SEC Filing

- ------------------------------------------------------------------------------- - ------------------------------------------------------------------------------- SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ---------------- FORM 10-K/A [X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 1998 [_] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 (NO FEE REQUIRED) For the transition period from to Commission file number 1-13087 BOSTON PROPERTIES, INC. (Exact name of Registrant as Specified in its Charter) 04-2473675 Delaware (IRS Employer Id. Number) (State or Other Jurisdiction of Incorporation or Organization) 8 Arlington Street 02116 Boston, Massachusetts (Zip Code) (Address of Principal Executive Offices) Registrant's telephone number, including area code: (617) 859-2600 Securities registered pursuant to Section 12(b) of the Act: Title of Each Class Name of Exchange on Which Common Stock, Par Value $.01 Registered Preferred Stock Purchase Rights New York Stock Exchange Securities registered pursuant to Section 12(g) of the Act: None Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes [X] No [_] Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of Registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. [X] As of March 26, 1999, the aggregate market value of the 60,956,365 Shares of Common Stock held by non-affiliates of the Registrant was $1,889,647,315 based upon the closing price of $31.00 on the New York Stock Exchange composite tape on such date. (For this computation, the Registrant has excluded the market value of all Shares of Common Stock reported as beneficially owned by executive officers and trustees of the Registrant; such exclusion shall not be deemed to constitute an admission that any such person is an affiliate of the Registrant.) As of March 26, 1999, there were 63,540,106 Shares of Common Stock outstanding. Certain information contained in the Company's Proxy Statement relating to its Annual Meeting of Stockholders to be held May 5, 1999 are incorporated by reference in Part III, Items 10, 11, 12 and 13. - ------------------------------------------------------------------------------- - -------------------------------------------------------------------------------

Boston Properties, Inc. (the "Company") hereby amends Part II, Item 8 and Part IV, Item 14 of its Form 10-K dated December 31, 1998 filed with the Securities and Exchange Commission on March 31, 1999 to amend (1) page F-2 to include an opinion on the financial statement schedule and (2) amend the financial statement schedule. This amended annual report on Form 10-K/A does not reflect any change in the Company's reported consolidated financial condition or results of operations. Item 8. Financial Statements and Supplementary Data See "Index to Financial Statements" on page F-1 of this Form 10-K/A. 1

PART IV ITEM 14. Exhibits, Financial Statement Schedule and Reports on Form 8-K (a) Financial Statements and Financial Statement Schedule See "Index to Financial Statements" on page F-1 on this Form 10-K/A. (b) Reports on Form 8-K A report on Form 8-K was filed on January 12, 1998 which included information regarding Item 5. The Form 8-K was filed in connection with the Company's press release regarding the potential acquisition of The Prudential Center. A report on Form 8-K was filed on January 26, 1998 which included information regarding Item 5. The Form 8-K was filed in connection with the Company's press release regarding the Company's fourth quarter 1997 earnings. A report on Form 8-K was filed on February 6, 1998 which included information regarding Item 2, 5 and 7. Included in Item 7 was pro forma information and exhibits. The Form 8-K was filed in connection with the Company's acquisition of Riverfront Plaza and the Mulligan/Griffin Portfolio. A report on Form 8-K was filed on June 9, 1998 which included information regarding Item 5. The Form 8-K was filed in connection with information presented to investors and analysts. A report on Form 8-K was filed on July 15, 1998 (as amended by Form 8-K/A filed on August 25, 1998) which included information regarding Item 2, 5 and 7. Included in Item 7 was pro forma information and exhibits. The Form 8-K was filed in connection with the Company's acquisition of the Carnegie Center portfolio. A report on Form 8-K was filed on July 17, 1998 (as amended by Form 8-K/A filed on August 25, 1998) which included information regarding Item 2, 5 and 7. Included in Item 7 was pro forma information and exhibits. The Form 8-K was filed in connection with the Company's acquisition of The Prudential Center. A report on Form 8-K was filed on July 27, 1998 (as amended by Form 8-K/A filed on August 25, 1998) which included information regarding Item 2, 5 and 7. Included in Item 7 was pro forma information and exhibits. The Form 8-K was filed in connection with the Company's acquisition of Metropolitan Square. A report on Form 8-K was filed on October 27, 1998 which included information regarding Item 5. The Form 8-K was filed in connection with the Company's press release regarding the Company's third quarter 1998 earnings and information presented to investors and analysts. A report on Form 8-K was filed on November 25, 1998 (as amended by Form 8- K/A filed on January 26, 1999) which included information regarding Item 2, 5 and 7. Included in Item 7 was pro forma information and exhibits. The Form 8-K was filed in connection with the Company's acquisition of Embarcadero Center. A report on Form 8-K was filed on January 27, 1999 which included information regarding Item 5. The Form 8-K was filed in connection with the Company's press release regarding the Company's fourth quarter 1998 earnings. 2

(c) Exhibits Exhibit No. Description ----------- ----------- 3.1 Form of Amended and Restated Certificate of Incorporation of the Company (2) 3.2 Form of Amended and Restated Bylaws of the Company (2) 4.1 Form of Shareholder Rights Agreement dated as of June , 1997 between the Company and BankBoston, N.A., as Rights Agent (2) 4.2 Form of Certificate of Designation for Series E Junior Participating Cumulative Preferred Stock, par value $.01 per share (2) 4.3 Form of Certificate of Designations for the Series A Preferred Stock. (9) 4.4 Form of Common Stock Certificate (2) 10.1 Second Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of June 29, 1998. (6) 10.2 Certificate of Designations for the Series One Preferred Units, dated June 30, 1998, constituting an amendment to the Second Amended and Restated Agreement of Limited Partnership of the Operating Partnership. (6) 10.3 Certificate of Designations for the Series Two Preferred Units, dated November 12, 1998, constituting an amendment to the Second Amendment and Restated Agreement of Limited Partnership of the Operating Partnership. (9) 10.4 Certificate of Designations for the Series Three Preferred Units, dated November 12, 1998, constituting an amendment to the Second Amended and Restated Agreement of Limited Partnership of the Operating Partnership. (9) 10.5 1997 Stock Option and Incentive Plan (2) 10.6 Form of Noncompetition Agreement between the Company and Mortimer B. Zuckerman (2) 10.7 Form of Employment and Noncompetition Agreement between the Company and Edward H. Linde. (2) 10.8 Form of Employment Agreement between the Company and certain executive officers (2) 10.9 Form of Indemnification Agreement between the Company and each of its directors and executive officers (2) 10.10 Omnibus Option Agreement by and among the Operating Partnership and the Grantors named therein dated as of April 9, 1997 (2) 10.11 Revolving Credit Agreement with BankBoston, N.A. (2) 10.12 Form of Registration Rights Agreement among the Company and the persons named therein (2) 10.13 Form of Lease Agreement dated as of June , 1997 between Edward H. Linde and Mortimer B. Zuckerman, as Trustees of Downtown Boston Properties Trust, and ZL Hotel LLC (2) 10.14 Form of Lease Agreement dated as of June , 1997 between Edward H. Linde and Mortimer B. Zuckerman, as Trustees of Two Cambridge Center Trust, and ZL Hotel LLC (2) 10.15 Option Agreement between Boston Properties Limited Partnership and Square 36 Properties Limited Partnership dated April 15, 1997 (2) 10.16 Form of Certificate of Incorporation of Boston Properties Management, Inc (2) 10.17 Form of By-laws of Boston Properties Management, Inc. (2) 10.18 Form of Limited Liability Agreement of ZL Hotel LLC (2) 10.19 Form of Option Agreement to Acquire the Property known as Sumner Square(2) 10.20 Loan Modification Agreement between Lexreal Associates and Mitsui Seimei America Corporation relating to loan secured by 599 Lexington Avenue (2) 10.21 Loan Modification and Extension Agreement by and between Southwest Market Limited Partnership, a District of Columbia limited partnership, Mortimer B. Zuckerman and Edward H. Linde and the Sumitomo Bank, Limited, for One Independence Square, dated as of September 26, 1994 (2) 3

Exhibit No. Description ----------- ----------- 10.22 Loan Modification and Extension Agreement by and among Southwest Market Limited Partnership, a District of Columbia limited partnership, Mortimer B. Zuckerman and Edward H. Linde and the Sumitomo Bank, Limited, for Two Independence Square, dated as of September 26, 1994 (2) 10.23 Construction Loan Agreement by and between the Sumitomo Bank, Limited and Southwest Market Limited Partnership, dated as of August 21, 1990 (2) 10.24 Construction Loan Agreement by and between the Sumitomo Bank, Limited and Southwest Market Limited Partnership for Two Independence Square, dated as of February 22, 1991 (2) 10.25 Consent and Loan Modification Agreement regarding One Independence Square between the Sumitomo Bank, Limited and Southwest Market Limited Partnership dated as of June, 1997 (2) 10.26 Consent and Loan Modification Agreement regarding Two Independence Square between the Sumitomo Bank, Limited and Southwest Market Limited Partnership dated as of June, 1997 (2) 10.27 Form of Amended and Restated Loan Agreement between Square 36 Office Joint Venture and the Sanwa Bank Limited dated as of June , 1997 (2) 10.28 Indemnification Agreement between the Operating Partnership and Mortimer B. Zuckerman and Edward H. Linde (2) 10.29 Compensation Agreement between the Company and Robert Selsam, dated as of August 10, 1995 relating to 90 Church Street (2) 10.30 Contribution Agreement dated September 2, 1997 by and among the Operating Partnership, the Company and Kenvic Associates (5) 10.31 Lock-Up and Registration Rights Agreement dated November 21, 1997 by and among the Operating Partnership, the Company and Kenvic Associates (1) 10.32 Agreement dated November 21, 1997 by and between the Operating Partnership, the Company and Kenvic Associates (1) 10.33 Note and Mortgage Modification and Spreader Agreement between John Hancock, as lender, and the Operating Partnership, as borrower (1) 10.34 Agreement between Bankers Trust Company, as seller, and the Operating Partnership, as borrower, dated September 11, 1997 (3) 10.35 Term loan agreement between Chase Manhattan Bank, as lender, and the Operating Partnership, as borrower, dated September 11, 1997 (4) 10.36 Swap Transaction Agreement between the Chase Manhattan Bank and the Company dated November 4, 1997 (3) 10.37 Interest Guarantee and Agreement between Chase Manhattan Bank, as lender, and the Operating Partnership, as borrower, dated September 11, 1997 (4) 10.38 Net Cash Flow Shortfall Guarantee and Agreement between Chase Manhattan Bank, as lender, and the Operating Partnership, as borrower, dated September 11, 1997 (4) 10.39 Hazardous Material Guaranty and Indemnification Agreement between Chase Manhattan Bank, as lender, and the Operating Partnership, as borrower, dated September 11, 1997 (4) 10.40 Amended and Restated Real Estate Purchase and Sale Contract between International Business Machines Corporation, as seller, and the Operating Partnership, as buyer, dated October 20, 1997 (4) 10.41 First Amendment to Revolving Credit Agreement dated July 29, 1997 by and among the Company, BankBoston, N.A., and the subsidiaries of the Company and lending institutions named therein (5) 10.42 Second Amendment to Revolving Credit Agreement dated July 30, 1997 by and among the Company, BankBoston, N.A., and the subsidiaries of the Company and lending institutions named therein (5) 4

Exhibit No. Description ----------- ----------- 10.43 Third Amendment to Revolving Credit Agreement dated September 11, 1997 by and among the Company, BankBoston, N.A., and the subsidiaries of the Company and lending institutions named therein (5) 10.44 Fourth Amendment to Revolving Credit Agreement dated October 31, 1997 by and among the Company, BankBoston, N.A., and the subsidiaries of the Company and lending institutions named therein (5) 10.45 Environmental Indemnity and Agreement made by the Operating Partnership in favor of John Hancock Mutual Life Insurance Company (1) 10.46 Indemnification Agreement made by the Operating Partnership in favor of John Hancock Mutual Life Insurance Company (1) 10.47 Consolidation, Extension and Modification Agreement dated as of May 11, 1988 by and between Kenvic Associates and John Hancock Mutual Life Insurance Company (1) 10.48 Modification Agreement dated as of May 30, 1990 by and between Kenvic Associates and John Hancock Mutual Life Insurance Company (1) 10.49 Note and Mortgage Notification Agreement, dated July 23, 1992 by and between Kenvic Associates and John Hancock Mutual Life Insurance Company (2) 10.50 Note and Mortgage Modification and Spreader Agreement dated as of December 29, 1995 by and between Kenvic Associates and John Hancock Mutual Life Insurance Company (1) 10.51 Contribution Agreement dated November 26, 1997 the Operating Partnership, Boston Properties LLC and the Contributors named therein. (1) 10.52 Promissory Note dated January , 1998 between the Operating Partnership and Metropolitan Life Insurance Company (1) 10.53 Deed of Trust, Security Agreement and Fixture Filing dated January , 1998 (1) 10.54 Unsecured Indemnity Agreement dated January , 1998 (1) 10.55 Contribution and Conveyance Agreement concerning the Carnegie Portfolio, dated June 30, 1998 by and among the Company, the Operating Partnership, and the parties named therein as Landis Parties. (6) 10.56 Contribution Agreement, dated June 30, 1998, by and among the Company, the Operating Partnership, and the parties named therein as Landis Parties. (6) 10.57 Registration Rights and Lock-Up Agreement, dated June 30, 1998 by and among the Company, the Operating Partnership and the parties named therein as Holders. (6) 10.58 Non-Competition Agreement, dated as of June 30, 1998, by and between Alan B. Landis and the Company. (6) 10.59 Agreement Regarding Directorship, dated as of June 30, 1998, by and between the Company and Alan B. Landis. (6) 10.60 Purchase and Sale Agreement, dated May 7, 1998, by and between Prudential and the Operating Partnership. (7) 10.61 Contribution Agreement, dated as of May 7, 1998, by and between Prudential and the Operating Partnership. (7) 10.62 Registration Rights Agreement, dated as of July 2, 1998, by and among the Registrant, Strategic Value Investors II, LLC and Prudential. (7) 10.63 Contribution Agreement dated June 5, 1998, by and among Boston Properties Limited Partnership, Boston Properties LLC, Square 224 Associates and the Oliver Carr Company. (8) 10.64 Registration Rights and Lock-up Agreement, dated as of July 9, 1998, by and between Boston Properties, Inc. and Square 224 Associates. (8) 10.65 Purchase and Sale Agreement, dated as of November 12, 1998, by and between Two Embarcadero Center West and BP OFR LLC. (9) 10.66 Contribution Agreement, dated as of November 12, 1998, by and among the Company, The Operating Partnership, Embarcadero Center Investors Partnership ("ECIP") and the partners in ECIP listed on Exhibit A thereto. (9) 5

Exhibit No. Description ----------- ----------- 10.67 Contribution Agreement, dated as of November 12, 1998, by and among the Company, the Operating Partnership, Three Embarcadero Center West ("Three ECW") and the partners in Three ECW listed on Exhibit A thereto. (9) 10.68 Three ECW Redemption Agreement, dated as of November 12, 1998, by and among Three ECW, the Operating Partnership, BP EC West LLC, Prudential, PIC Realty Corporation ("PIC") and Prudential Realty Securities II, Inc. ("PRS II").(9) 10.69 Three ECW Property Contribution Agreement, dated as of November 12, 1998, by and among Three ECW, Prudential, PIC, PRS II, the Operating Partnership, the Company and BP EC West LLC. (9) 10.70 Registration Rights and Lock-Up Agreement, dated November 12, 1998, by and among the Company, the Operating Partnership and the Holders named therein.(9) 10.71 Third Amended and Restated Partnership Agreement of One Embarcadero Center Venture, dated as of November 12, 1998, by and between Boston Properties LLC ("BPLLC"), as managing general partner, BP EC1 Holdings LLC ("BP EC1 LLC"), as non-managing general partner, and PIC, as non-managing general partner (9) 10.72 Third Amended and Restated Partnership Agreement of Embarcardero Center Associates, dated as of November 12, 1998, by and between BP LLC, as managing general partner, BP EC2 Holdings LLC ("BP EC2 LLC"), as non-managing general partner, and PIC, as non- managing general partner. (9) 10.73 Second Amended and Restated Partnership Agreement of Three Embarcadero Center Venture, dated as of November 12, 1998, by and between BPLLC, as managing general partner, BP EC3 Holdings LLC ("BP EC3 LLC"), as non-managing general partner, and Prudential, as non-managing general partner. (9) 10.74 Second Amended and Restated Partnership Agreement of Four Embarcadero Center Venture, dated as of November 12, 1998, by and between BPLLC, as managing general partner, BP EC4 Holdings LLC ("BP EC4 LLC"), as non-managing general partner, and Prudential, as non-managing general partner. (9) 10.75 Note Purchase Agreement, dated as of November 12, 1998, by and between Prudential Realty Securities, Inc. ("PRS") and One Embarcadero Center Venture. (9) 10.76 Note Purchase Agreement, dated as of November 12, 1998, by and between PRS and Embarcadero Center Associates. (9) 10.77 Note Purchase Agreement, dated November 12, 1998, by and between PRS and Three Embarcadero Center Venture. (9) 10.78 Note Purchase Agreement, dated November 12, 1998, by and between PRS and Four Embarcadero Center Venture. (9) 10.79 Redemption Agreement, dated as of November 12, 1998, by and among One Embarcadero Center Venture, BPLLC, BP EC1 LLC and PIC. (9) 10.80 Redemption Agreement, dated as of November 12, 1998, by and among Embarcadero Center Associates, BPLLC, BP EC2 LLC and PIC. (9) 10.81 Redemption Agreement, dated as of November 12, 1998, by and among Three Embarcadero Center Venture, BPLLC, BP EC3 LLC and Prudential. (9) 10.82 Redemption Agreement, dated as on November 12, 1998, by and among Four Embarcadero Center Venture, BPLLC, BP EC4 LLC and Prudential. (9) 10.83 Option and Put Agreement, dated as of November 12, 1998, by and between One Embarcadero Center Venture and Prudential. (9) 10.84 Option and Put Agreement, dated as of November 12, 1998, by and between Embarcadero Center Associates and Prudential. (9) 10.85 Option and Put Agreement, dated as of November 12, 1998, by and between Three Embarcadero Center Venture and Prudential. (9) 6

Exhibit No. Description ----------- ----------- 10.86 Option and Put Agreement, dated as of November 12, 1998, by and between Four Embarcadero Center Venture and Prudential. (9) 10.87 Stock Purchase Agreement, dated as of September 28, 1998, by and between the Company and Prudential. (9) 21.1 Schedule of Subsidiaries of the Company (1) 23.1 Consent of PricewaterhouseCoopers LLP, Independent Accountants 27.1 Financial Data Schedule - -------- (1) Incorporated herein by reference to the Company's Registration Statement on Form S-11 (No. 333-41449) (2) Incorporated herein by reference to the Company's Registration Statement on Form S-11 (No. 333-25279) (3) Incorporated herein by reference to the Company's Current Report on Form 8- K filed on November 25, 1997 (4) Incorporated herein by reference to the Company's Current Report on Form 8- K/A filed on November 14, 1997 (5) Incorporated herein by reference to the Company's Current Report on Form 8- K filed on November 26, 1997 (6) Incorporated herein by reference to the Company's Current Report on Form 8-K filed on July 15, 1998. (7) Incorporated herein by reference to the Company's Current Report on Form 8- K filed on July 17, 1998. (8) Incorporated herein by reference to the Company's Current Report on Form 8- K filed on July 27, 1998. (9) Incorporated herein by reference to the Company's Current Report on Form 8- K filed on November 25, 1998. 7

SIGNATURES Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant, Boston Properties, Inc., has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. BOSTON PROPERTIES, INC. By: /s/ David G. Gaw ---------------------------------- David G. Gaw Chief Financial Officer Date March 31, 1999 Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By: /s/ Mortimer B. Zuckerman March 31, 1998 ---------------------------------- Mortimer B. Zuckerman Chairman of the Board of Directors By: /s/ Edward H. Linde ---------------------------------- Edward H. Linde President and Chief Executive Officer By: /s/ David G. Gaw ---------------------------------- David G. Gaw Chief Financial Officer By: /s/ Alan J. Patricof ---------------------------------- Alan J. Patricof Director By: /s/ Ivan G. Seidenberg ---------------------------------- Ivan G. Seidenberg By: /s/ Martin Turchin ---------------------------------- Martin Turchin Director By: /s/ Alan B. Landis ---------------------------------- Alan B. Landis Director By: /s/ Richard E. Salomon ---------------------------------- Richard E. Salomon Director 8

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP INDEX TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS FINANCIAL STATEMENTS Page ---- Report of Independent Accountants....................................... F-2 Consolidated Balance Sheet of Boston Properties, Inc. (the "Company") as of December 31, 1998 and December 31, 1997......................... F-3 Consolidated Statement of Operations of the Company for the year ended December 31, 1998 and for the period from June 23, 1997 (inception of operations) to December 31, 1997and Combined Statements of Operations for the Predecessor Group for the period from January 1, 1997 to June 22, 1997 and the year ended December 31, 1996..................................................... F-4 Consolidated Statement of Changes in Stockholders' Equity of the Company For the year ended December 31, 1998 and for the period June 23, 1997 (inception of operations) to December 31, 1997 and the Combined Statement of Changes in Owners' Equity (Deficit) of the Predecessor Group for the period January 1, 1997 to June 22, 1997 and the year ended December 31, 1996..................................................... F-5 Consolidated Statement of Cash Flows of the Company for the year ended December 31, 1998 and for the period June 23, 1997 (inception of operations) to December 31, 1997and Combined Statement of Cash Flows of the Predecessor Group for the period January 1, 1997 to June 22, 1997 and the year ended December 31, 1996.................... F-6 Notes to Consolidated and Combined Financial Statements................. F-7 Financial Statement Schedule--Schedule III.............................. F-22 All other schedules for which provision is made in the applicable accounting regulations of the Securities and Exchange Commission are not required under the related instructions or are inapplicable, and therefore have been omitted. F-1

REPORT OF INDEPENDENT ACCOUNTANTS To the Board of Directors and Stockholders of Boston Properties, Inc. In our opinion, the accompanying consolidated financial statements and the financial statement schedule listed in the accompanying index present fairly, in all material respects, (i) the financial position of Boston Properties, Inc. (the "Company") at December 31, 1998 and 1997, the results of operations and cash flows for the year ended December 31, 1998, and for the period from June 23, 1997 to December 31, 1997, and (ii) as described in Note 1, the combined statements of operations and cash flows, for the period from January 1, 1997 to June 22, 1997 and for the year ended December 31, 1996 of the Boston Properties Predecessor Group, in conformity with generally accepted accounting principles. These financial statements and financial statement schedule are the responsibility of the Company's management; our responsibility is to express an opinion on these financial statements and financial statement schedule based on our audits. We conducted our audits of these statements in accordance with generally accepted auditing standards which require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for the opinion expressed above. /s/ PricewaterhouseCoopers LLP Boston, Massachusetts January 24, 1999, except for Note 16, for which the date is February 10, 1999 F-2

BOSTON PROPERTIES, INC. CONSOLIDATED BALANCE SHEETS December 31, December 31, 1998 1997 ------------ ------------ (in thousands, except share amounts) ASSETS Real estate: Less: accumulated depreciation........................ $4,917,193 $1,796,500 Total real estate................................... (357,384) (294,218) ---------- ---------- 4,559,809 1,502,282 Cash and cash equivalents............................... 12,166 17,560 Notes receivable........................................ 420,143 -- Escrows................................................. 19,014 14,178 Tenant and other receivables, net....................... 40,830 24,458 Accrued rental income, net.............................. 64,251 55,190 Deferred charges, net................................... 46,029 35,485 Prepaid expenses and other assets....................... 26,058 20,225 Investments in joint ventures........................... 46,787 3,143 ---------- ---------- Total assets........................................ $5,235,087 $1,672,521 ========== ========== LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities: Mortgage notes payable................................ $2,653,581 $1,099,253 Notes payable......................................... 420,143 -- Unsecured line of credit.............................. 15,000 233,000 Accounts payable and accrued expenses................. 33,638 23,822 Dividends payable..................................... 40,494 22,539 Accrued interest payable.............................. 7,307 6,581 Other liabilities..................................... 37,209 11,642 ---------- ---------- Total liabilities................................... 3,207,372 1,396,837 ---------- ---------- Commitments and contingencies........................... -- -- ---------- ---------- Minority interests...................................... 1,079,234 100,636 ---------- ---------- Stockholders' equity: Preferred stock, $.01 par value, 50,000,000 shares authorized, none issued or outstanding................................ -- -- Excess stock, $.01 par value, 150,000,000 shares authorized, none issued or outstanding................................ -- -- Common stock, $.01 par value, 250,000,000 shares authorized, 63,527,819 and 38,694,041 issued and outstanding in 1998 and 1997, respectively.......................... 635 387 Additional paid-in capital............................ 955,711 172,347 Dividends in excess of earnings....................... (7,865) 2,314 ---------- ---------- Total stockholders' equity.......................... 948,481 175,048 ---------- ---------- Total liabilities and stockholders' equity........ $5,235,087 $1,672,521 ========== ========== The accompanying notes are an integral part of these financial statements. F-3

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP CONSOLIDATED AND COMBINED STATEMENTS OF OPERATIONS (in thousands, except per share data) The Company The Predecessor Group -------------------------- ---------------------------- Period from June 23, 1997 Period from Year ended to January 1, 1997 Year ended December 31, December 31, to December 31, 1998 1997 June 22, 1997 1996 ------------ ------------- --------------- ------------ Revenue Rental: Base rent............ $419,756 $126,401 $ 80,122 $169,420 Recoveries from tenants............. 48,718 12,564 10,283 22,607 Parking and other.... 19,103 676 3,397 2,979 -------- -------- -------- -------- Total rental revenue........... 487,577 139,641 93,802 195,006 Hotel................. -- -- 31,185 65,678 Development and management services.. 12,411 3,813 3,685 5,719 Interest and other.... 13,859 2,189 1,146 3,530 -------- -------- -------- -------- Total revenue...... 513,847 145,643 129,818 269,933 -------- -------- -------- -------- Expenses Rental: Operating............ 80,894 19,591 13,650 29,823 Real estate taxes.... 69,596 20,502 13,382 28,372 Hotel: Operating............ -- -- 20,938 43,634 Real estate taxes.... -- -- 1,514 3,100 General and administrative....... 22,504 6,689 5,116 10,754 Interest.............. 124,860 38,264 53,324 109,394 Depreciation and amortization......... 75,418 21,719 17,054 36,199 -------- -------- -------- -------- Total expenses..... 373,272 106,765 124,978 261,276 -------- -------- -------- -------- Income before minority interests.............. 140,575 38,878 4,840 8,657 Minority interests...... (41,982) (11,652) (235) (384) -------- -------- -------- -------- Income before extraordinary items.... 98,593 27,226 4,605 8,273 Extraordinary gain (loss) from early debt extinguishments, net... (5,481) 7,925 -- (994) -------- -------- -------- -------- Net income.............. $ 93,112 $ 35,151 $ 4,605 $ 7,279 ======== ======== ======== ======== Basic earnings per share: Income before extraordinary items.. $ 1.62 $ 0.70 -- -- Extraordinary gain (loss), net.......... (0.09) 0.21 -- -- -------- -------- Net income............ $ 1.53 $ 0.91 -- -- ======== ======== Weighted average number of common shares outstanding... 60,776 38,694 -- -- Diluted earnings per share: Income before extraordinary items.. $ 1.61 $ 0.70 -- -- Extraordinary gain (loss), net.......... (0.09) 0.20 -- -- -------- -------- Net income............ $ 1.52 $ 0.90 -- -- ======== ======== Weighted average number of common shares outstanding... 61,308 39,108 -- -- The accompanying notes are an integral part of these financial statements. F-4

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP CONSOLIDATED AND COMBINED STATEMENTS OF STOCKHOLDERS" AND OWNER' EQUITY (DEFICIT) (in thousands) Common Stock ------------- Additional Dividends Paid-in in excess of Owners' Equity Shares Amount Capital Earnings (Deficit) Total ------ ------ ---------- ------------ -------------- --------- The Predecessor Group: Balance, January 1, 1996................. $(506,653) $(506,653) Contributions....... 33,279 33,279 Net income for the year............... 7,279 7,279 Distributions and conversion of equity to note payable-- affiliate.......... (110,537) (110,537) --------- --------- Balance, December 31, 1996................. (576,632) (576,632) Contributions....... 9,330 9,330 Net income for period January 1, 1997 through June 22, 1997........... 4,605 4,605 Distributions....... (32,125) (32,125) --------- --------- Balance, June 22, 1997................. (594,822) (594,822) The Company: Reclassification adjustment........... ($594,822) 594,822 -- Sale of Common Stock net of Offering costs................ 38,694 $387 838,822 839,209 Stock issued in connection with property acquisition.......... 16 16 Allocation of minority interest in Operating Partnership.......... (71,669) (71,669) Net income, June 23, 1997 to December 31, 1997................. $ 35,151 35,151 Dividends declared.... (32,837) (32,837) ------ ---- ---------- ---------- --------- --------- Stockholders' Equity, December 31, 1997.... 38,694 387 172,347 2,314 -- 175,048 Sale of Common Stock net of Offering costs................ 23,000 230 764,760 764,990 Unregistered Common Shares issued........ 1,823 18 58,819 58,837 Conversion of operating partnership units to common stock................ 10 -- 250 250 Allocation of minority interest............. (40,490) (40,490) Net income for the year................. 93,112 93,112 Dividends declared.... (103,291) (103,291) Stock options exercised............ 1 -- 25 25 ------ ---- ---------- ---------- --------- --------- Stockholders' Equity, December 31, 1998.... 63,528 $635 $ 955,711 $ (7,865) $ -- $ 948,481 ====== ==== ========== ========== ========= ========= The accompanying notes are an integral part of these financial statements. F-5

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP CONSOLIDATED AND COMBINED STATEMENTS OF OPERATIONS The Company The Predecessor Group ----------------------------------- --------------------------------- Period from Period from June 23, 1997 January 1, 1997 Year ended to to Year ended December 31, 1998 December 31, 1997 June 22, 1997 December 31, 1996 ----------------- ----------------- --------------- ----------------- Cash flows from operating activities: Net income............. $ 93,112 $ 35,151 $ 4,605 $ 7,279 Adjustments to reconcile net income to net cash provided by operating activities: Depreciation and amortization......... 75,418 21,719 17,054 36,199 Non-cash portion of interest expense..... 247 547 1,497 644 Extraordinary loss (gain) on early debt extinguishments...... 7,743 (11,216) -- -- Minority interests.... 38,760 7,659 -- -- Change in assets and liabilities: Escrows............... (4,836) 11,429 (136) 2,242 Tenant and other receivables, net..... (16,372) (5,295) (7,114) 2,313 Accrued rental income............... (9,061) (5,694) (291) 475 Prepaid expenses and other issues......... (5,833) (14,330) (1,494) 2,777 Accounts payable and accrued expenses..... 9,816 5,611 5,220 (572) Accrued interest payable.............. 726 (5,107) 2,021 579 Other liabilities..... 25,567 5,672 3,728 3,971 ----------- --------- -------- --------- Total adjustments.... 122,175 10,995 20,485 48,628 ----------- --------- -------- --------- Net cash provided by operating activities.......... 215,287 46,146 25,090 55,907 ----------- --------- -------- --------- Cash flows from investing activities: Acquisitions to real estate and equipment.. (1,697,449) (526,890) (27,721) (30,238) Tenant leasing costs... (17,979) (2,793) (2,550) (4,077) Investments in joint ventures.............. (43,644) (570) (2,573) -- Notes receivable....... (420,143) -- -- -- Cash from contributed assets................ -- 10,510 -- -- ----------- --------- -------- --------- Net cash used in investing activities.......... (2,179,215) (519,743) (32,844) (34,315) ----------- --------- -------- --------- Cash flows from financing activities: Net proceeds from sales of common stock....... 819,103 839,209 -- -- Owners' contributions.. -- -- 9,330 33,279 Owners' distributions.. -- -- (32,125) (105,619) Borrowings on unsecured line of credit........ 322,000 233,000 -- -- Repayment of unsecured line of credit........ (540,000) -- -- -- Repayments of mortgage notes................. (159,714) (712,338) (3,799) (93,695) Proceeds from mortgage notes................. 1,226,717 220,000 -- 117,269 Proceeds from notes payable............... 420,143 -- -- 11,933 Accounts receivable-- affiliate............. -- -- (804) -- Accounts payable-- affiliate............. -- (19,983) 19,983 -- Proceeds from (repayments of) notes payable--affiliate.... -- (38,833) 16,716 -- Dividends and distributions......... (127,307) (17,026) -- -- Deferred financing and other costs........... (2,408) (12,872) (35) (1,628) ----------- --------- -------- --------- Net cash provided by financing activities.......... 1,958,534 491,157 9,266 (38,461) ----------- --------- -------- --------- Net increase (decrease) in cash................ (5,394) 17,560 1,512 (16,869) Cash and cash equivalents, beginning of period.............. 17,560 -- 8,998 25,867 ----------- --------- -------- --------- Cash and cash equivalents, end of period................. $ 12,166 $ 17,560 $ 10,510 $ 8,998 =========== ========= ======== ========= Supplemental disclosures: Cash paid for interest.............. $ 46,422 $ 36,783 $ 50,917 $ 107,700 =========== ========= ======== ========= Interest capitalized... $ 6,933 $ 1,168 $ 1,111 $ 366 =========== ========= ======== ========= Non-cash activities: Operating activity: Non-cash portion of interest expense..... $ 247 $ 547 $ 1,497 644 =========== ========= ======== ========= Investing and Financing activities: Mortgage notes payable assumed in connection with acquisitions.... $ 496,926 -- -- -- =========== Issuance of minority interest in connection with acquisition.......... $ 941,318 -- -- -- =========== Common stock issued in connection with acquisition.......... $ 5,000 -- -- -- =========== Dividends and distributions declared but not paid................. $ 40,494 $22,539 -- -- =========== ========= Conversion of owners' equity to notes payable--affiliate... -- -- -- $ 4,918 ========= The accompanying notes are an integral part of these financial statements. F-6

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--continued (dollars in thousands, except per share amounts) 1. Organization and Basis of Presentation Organization Boston Properties, Inc. (the "Company") is one of the largest owners and developers of office properties in the United States, with a significant presence in Greater Boston, Greater Washington, D.C., Greater San Francisco, Midtown Manhattan, Princeton/East Brunswick, New Jersey, Baltimore, Maryland, and Richmond, Virginia. The Company is a fully integrated self-administered and self-managed real estate investment trust ("REIT"). The Company was formed to succeed to the real estate development, redevelopment, acquisition, management, operating and leasing businesses association with the predecessor company founded by Mortimer B. Zuckerman and Edward H. Linde in 1970. The term "Predecessor Group" or "Predecessor" as used herein refers to the entities that owned interests in one or more properties that were contributed to the Company in connection with the Company's initial public offering in June 1997 (the "Initial Offering"). The term "Company" as used herein includes Boston Properties, Inc. and its subsidiaries on a consolidated basis (including Boston Properties Limited Partnership (the "Operating Partnership")). On June 23, 1997, the Company commenced operations after completing an initial public offering of 36,110,000 common shares at a price per share of $25.00 (including 4,710,000 shares issued as a result of the exercise of an over-allotment option by the underwriters). The proceeds to the Company, net of underwriters' discount and offering costs, were approximately $839.2 million. Upon the completion of such offering, the Company succeeded to substantially all of the interests of the Predecessor in (i) a portfolio of office, industrial and hotel properties and (ii) the acquisition, property management, leasing, development and construction businesses of the Predecessor Group. The acquisition, property management, leasing, development and construction businesses are being carried out by the Operating Partnership and the Company's majority-owned affiliate, Boston Properties Management, Inc. On January 26, 1998, the Company completed a second offering of 23,000,000 common shares at a price of $35.125 per share (including 3,000,000 shares issued as a result of the exercise of an over-allotment option by the underwriters). The proceeds to the Company, net of underwriters' discount and offering costs were approximately $765.0 million. Properties At December 31, 1998, the Company owned a portfolio of 121 commercial real estate properties (82 properties at December 31, 1997) (the "Properties") aggregating approximately 31.6 million square feet (including ten properties currently under development). The Properties consist of 108 office properties, including 76 Class A office properties and 32 Research and Development properties; nine industrial properties; three hotels; and one parking garage. In addition, the Company owns 21 parcels of land totaling 300.1 acres (which will support approximately 6.8 million square feet of development) and structured parking for 11,427 vehicles containing approximately 5.8 million square feet. The Company considers Class A office properties to be centrally located buildings that are professionally managed and maintained, attract high- quality tenants and command upper-tier rental rates, and that are modern structures or have been modernized to compete with newer buildings. The Company considers Research and Development properties to support office, research and development and other technical uses. Basis of Presentation The consolidated financial statements of the Company include all the accounts of the Company, Boston Properties Limited Partnership, and its subsidiaries. The financial statements reflect the properties acquired at F-7

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--continued (dollars in thousands, except per share amounts) their historical accounting basis to the extent of the acquisition of interests from the Predecessor Group's owners who continued as investors. The remaining interests acquired for cash from those owners of the Predecessor Group, who decided to sell their interests, have been accounted for as a purchase and the excess of the purchase price over the related historical cost basis was allocated to real estate. The combined financial statements of the Predecessor Group include interests in properties and the third party commercial real estate development, project management and property management business. The accompanying combined financial statements for the Predecessor Group have been presented on a combined basis due to the common ownership and management of the entities included in the Predecessor Group; therefore, its combined financial statements are presented for comparative purposes. All significant intercompany balances and transactions have been eliminated. Investments in joint ventures where the Company does not have a controlling interest are accounted for under the equity method. Under the equity method of accounting the net equity investment of the Company in the joint ventures is reflected on the consolidated balance sheets. 2. Significant Accounting Policies Real Estate Real estate is stated at depreciated cost. The Company periodically reviews its properties to determine if its carrying costs will be recovered from future operating cash flows. Upon determination that an impairment has occurred, those assets shall be reduced to fair value. No such impairment losses have been recognized to date. The cost of buildings and improvements includes the purchase price of property, legal fees and acquisition costs. The cost of buildings under development includes the capitalization of interest, property taxes and other costs incurred during the period of development. Expenditures for repairs and maintenance are charged to operations as incurred. Significant betterments are capitalized. When assets are sold or retired, their costs and related accumulated depreciation are removed from the accounts with the resulting gains or losses reflected in net income or loss for the period. Depreciation is computed on the straight-line basis over the estimated useful lives of the assets as follows: Land improvements..................... 25 to 40 years Buildings............................. 10 to 40 years Tenant improvements................... Shorter of useful life or terms of related lease Furniture, fixtures, and equipment.... 5 to 7 years Cash and Cash Equivalents Cash and cash equivalents consist of cash on hand and investments with maturities of three months or less from the date of purchase. The Company's cash and cash equivalents are held at major commercial banks. The Company has not experienced any losses to date on its invested cash. Escrows Escrows include amounts established pursuant to various agreements for security deposits, property taxes, insurance and other costs. F-8

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--continued (dollars in thousands, except per share amounts) Deferred Charges Deferred charges include leasing costs and financing fees. Fees and costs incurred in the successful negotiation of leases, including brokerage, legal and other costs have been deferred and are being amortized on a straight-line basis over the terms of the respective leases. Fees and costs incurred to obtain long-term financing have been deferred and are being amortized over the terms of the respective loans on a basis which approximates the effective interest method and are included in interest expense. Fully amortized deferred charges are removed from the books upon the expiration of the lease or maturity of the debt. Minority Interests Minority Interests at December 31, 1998 represent minority interests in partially owned properties and minority holders' share in the Operating Partnership. Offering Costs Underwriting commissions and offering costs incurred in connection with the initial public offering and follow-on offering have been reflected as a reduction of additional paid-in capital. Dividends Earnings and profits, which will determine the taxability of dividends to shareholders, will differ from income reported for financial reporting purposes due to the differences for federal income tax purposes primarily in the estimated useful lives used to compute depreciation. Dividends declared represented approximately 85% and 59% ordinary income for federal income tax purposes for the year ended December 31, 1998 and the period from June 23, 1997 to December 31, 1997, respectively. Revenue Recognition Base rental revenue is reported on a straight-line basis over the terms of the respective leases. The impact of the straight-line rent adjustment increased revenues by $18,510 and $5,985 and decreased revenues by $475 for the years ended December 31, 1998, 1997 and 1996, respectively. Property operating cost reimbursements due from tenants for common area maintenance, real estate taxes and other recoverable costs are recognized in the period the expenses are incurred. Accrued rental income represents rental income earned in excess of rent payments received pursuant to the terms of the individual lease agreements, net of an allowance for doubtful accounts. Development fees are recognized ratably over the period of development. Management fees are recognized as revenue as they are earned. Interest Expense Interest expense on fixed rate debt with predetermined periodic rate increases is computed using the effective interest method over the terms of the respective loans. Earnings Per Share Basic earnings per share ("EPS") is computed by dividing net income by the weighted average number of common shares outstanding during the year. Diluted EPS reflects the potential dilution that could occur from common shares issuable through stock-based compensation including stock options and conversion of the minority interest in the Operating Partnership. F-9

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--continued (dollars in thousands, except per share amounts) Reclassifications Certain prior year balances have been reclassified in order to conform to current year presentation. Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Fair Value of Financial Instruments The carrying values of cash and cash equivalents, escrows, receivables, accounts payable, accrued expenses and other assets and liabilities are reasonable estimates of their fair values because of the short maturities of these instruments. Mortgage notes payable have aggregate carrying values which approximate their estimated fair values based upon the remaining maturities for certain debt and interest rates for debt with similar terms and remaining maturities. The fair values of these financial instruments were not materially different from their carrying or contract values. Income Taxes The Company has elected to be taxed as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the "Code"), commencing with its taxable year ended December 31, 1997. As a result, the Company generally will not be subject to federal corporate income tax on its taxable income that is distributed to its shareholders. A REIT is subject to a number of organizational and operational requirements, including a requirement that it currently distribute at least 95% of its annual taxable income. Accordingly, no provision has been made for federal income taxes in the accompanying consolidated financial statements. To assist the Company in maintaining its status as a REIT, the Company leases its two in-service hotel properties, pursuant to a lease with a participation in the gross receipts of such hotel properties, to a lessee ("ZL Hotel LLC") in which Messrs. Zuckerman and Linde, the Chairman of the Board and Chief Executive Officer ("CEO"), respectively, are the sole member-managers. Marriott International, Inc. manages these hotel properties under the Marriott name pursuant to a management agreement with the lessee. The Company has made similar arrangements with respect to a hotel property under development. The net difference between the tax basis and the reported amounts of the Company's assets and liabilities is approximately $987,789 and $149,000 as of December 31, 1998 and 1997, respectively. The Predecessor Group was not a legal entity subject to income taxes. No federal or state income taxes were applicable to the entities that managed and owned the properties; accordingly, no provision has been made for federal income taxes in the accompanying combined financial statements. Certain entities included in the Company's consolidated financial statements and the Predecessor Group's combined financial statements are subject to District of Columbia franchise taxes. Franchise taxes are recorded as rental- operating expenses in the accompanying combined financial statements. F-10

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--continued (dollars in thousands, except per share amounts) Concentrations of Credit Risk Management of the Company performs ongoing credit evaluations of the tenants and may require tenants to provide some form of credit support such as corporate guarantees and/or other financial guarantees. Although the Company's properties are geographically diverse and the tenants operate in a variety of industries, to the extent the Company has a significant concentration of rental revenues from any single tenant, the inability of that tenant to make its lease payments could have an adverse effect on the Company. Segment Reporting In 1998, the Company adopted Statement of Financial Accounting Standards 131 ("FAS 131"), "Disclosures about Segments of an Enterprise and Related Information." FAS 131 supersedes Statement of Financial Accounting Standards No. 14, "Financial Reporting for Segments of a Business Enterprise", replacing the "industry segment' approach with a "management" approach. The management approach designates the internal organization used by management for making operating decisions and assessing performance as the source of the Company's segments. FAS 131 also requires disclosures about product and services, geographic areas, and major customers. The adoption of FAS 131 did not affect results of operations or financial position of the Company. 3. Real Estate Real estate consisted of the following at December 31,: 1998 1997 ---------- ---------- Land................................................. $ 926,862 $ 403,022 Buildings and improvements........................... 3,628,212 1,223,892 Tenant improvements.................................. 134,973 118,374 Furniture, fixtures and equipment.................... 35,710 33,638 Developments in progress............................. 191,436 17,574 ---------- ---------- Total.............................................. 4,917,193 1,796,500 Less: accumulated depreciation....................... (357,384) (294,218) ---------- ---------- $4,559,809 $1,502,282 ---------- ---------- 4. Deferred Charges Deferred charges consisted of the following at December 31,: 1998 1997 -------- -------- Leasing costs............................................ $ 58,803 $ 46,769 Financing costs.......................................... 28,128 29,271 -------- -------- 86,931 76,040 Less: accumulated amortization........................... (40,902) (40,555) -------- -------- $ 46,029 $ 35,485 -------- -------- 5. Investments in Joint Ventures The investments in joint ventures represent (i) a 25% interest in a joint venture which is developing two office buildings in Reston, VA, (ii) a 25% interest in a joint venture which is developing one office building in Reston, VA and (iii) a 50% interest in a joint venture which is developing an office building in Washington, F-11

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--continued (dollars in thousands, except per share amounts) DC. The Company also serves as development manager for these joint ventures. Under the equity method of accounting the net equity investment is reflected on the consolidated balance sheets. The combined summarized balance sheets of the joint ventures are as follows: 1998 1997 -------- ------- Balance Sheets: Land..................................................... $ 43,550 $ 8,167 Developments in progress................................. 128,867 16,748 Other assets............................................. 10,032 1,192 -------- ------- Total Assets........................................... $182,449 $26,107 -------- ------- Construction loans payable............................... $ 55,638 $ 6,969 Other liabilities........................................ 20,595 7,042 Partners' equity......................................... 106,216 12,096 -------- ------- Total Liabilities and Partners' Equity................. $182,449 $26,107 -------- ------- Company's Share of Equity.................................. $ 46,787 $ 3,143 -------- ------- 6. Mortgage Notes Payable Mortgage notes payable comprise various loans at December 31, 1998 and 1997, each collateralized by a building and related land included in real estate assets. The mortgage notes payable are generally due in monthly installments and mature at various dates through February 1, 2010. Interest rates on fixed rate mortgage notes payable aggregating approximately $2,623,847 and $1,082,000 at December 31, 1998 and 1997, respectively, range from 6.40% to 8.59% (averaging 7.05% and 7.55% at December 31, 1998 and 1997, respectively). Variable rate mortgage notes payable were approximately $11,417 and $11,600 at December 31, 1998 and 1997, respectively, with rates ranging from 1.0% above the London Interbank Offered Rate ("LIBOR") (5.06% and 5.90% at December 31, 1998 and 1997, respectively) to 1.5% above the LIBOR rate. The interest rates related to the mortgage notes payable for three properties aggregating approximately $209,987 at December 31, 1998 and for two properties aggregating $198,781 at December 31, 1997 are subject to periodic scheduled rate increases. Interest expense for these mortgage notes payable is computed using the effective interest method. Additionally, mortgage notes payable at December 31, 1998 on three properties in the amount of $320,484 and a mortgage note payable on one property at December 31, 1997 totaling $185,618 have been accounted for at their fair value. The impact of using these methods decreased interest expense $2,656 and increased interest expense $547 and $1,347 for the years ended December 31, 1998, 1997 and 1996 respectively. The cumulative liability related to these adjustments is $18,317 and $6,430 at December 31, 1998 and 1997, respectively, and is included in mortgage notes payable. Combined aggregate principal payments of mortgage notes payable at December 31, 1998 are as follows: 1999................................ $ 26,940 2000................................ 233,075 2001................................ 146,059 2002................................ 385,394 2003................................ 206,853 Certain mortgage indebtedness aggregating approximately $707.1 million was repaid in conjunction with the initial public offering. These repayments, along with (i) the payment of certain related repayment penalties, F-12

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--continued (dollars in thousands, except per share amounts) (ii) the write-off of the related previously capitalized deferred financing costs and (iii) the extinguishment of the excess of the mortgage not payable balance over the principal payment necessitated by an increasing rate loan being accounted for using the effective interest method, generated a gain of approximately $7.9 million (net of minority interest share of approximately $3.3 million), which has been reflected as an extraordinary gain during the period from June 23, 1997 through December 31, 1997 in the financial statements. During 1998, the Company incurred an extraordinary loss primarily related to fees incurred in connection with the repayment of certain mortgages payable in connection with the Embarcadero Center acquisition. 7. Unsecured Line of Credit As of December 31, 1998, the Company has an agreement for a $500,000 unsecured revolving credit facility (the "Unsecured Line of Credit") maturing in June 2000. Outstanding balances under the Unsecured Line of Credit currently bear interest at a floating rate based on an increase over LIBOR from 90 to 120 basis points, depending upon the Company's applicable leverage ratio, or the lender's prime rate. The Unsecured Line of Credit requires monthly payments of interest only. The outstanding balance of the Unsecured Line of Credit was $15,000 and $233,000 at December 31, 1998 and 1997, respectively. The weighted average balance outstanding was approximately $68,293 and $117,000 during the year ended December 31, 1998 and the period from June 23, 1997 through December 31, 1997, respectively. The weighted average interest rate on amounts outstanding was approximately 6.64% and 6.82% during the year ended December 31, 1998 and the period from June 23, 1997 through December 31, 1997. The applicable interest rate under the Unsecured Line of Credit at December 31, 1998 was 6.73%. The Company's ability to borrow under the Unsecured Line of Credit is subject to the Company's ongoing compliance with a number of financial and other covenants, including, but not limited to, maintaining a certain ratio of secured indebtedness to total asset value, as defined. 8. Leasing Activity Future minimum lease payments (excluding operating expense reimbursements) as of December 31, 1998, under non-cancelable operating leases, which expire on various dates through 2029, are as follows: Years ending December 31, ------------------------- 1999............................... $ 547,576 2000............................... 511,158 2001............................... 471,238 2002............................... 411,966 2003............................... 334,378 Thereafter......................... 1,234,584 The geographic concentration of the future minimum lease payments to be received is detailed as follows: Location -------- Greater Boston.................... $ 584,318 Greater Washington D.C............ 1,273,401 Midtown Manhattan................. 913,636 Greater San Francisco............. 631,611 New Jersey and Pennsylvania....... 107,934 F-13

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--continued (dollars in thousands, except per share amounts) No one tenant represented more than 10% of the Company's total rental income for the year ended December 31, 1998. One tenant represented 13.3% of the Company's total rental income for the year ended December 31, 1997. 9. Segment Reporting The Company has determined that its segments are those that are based on the Company's method of internal reporting, which classifies its operations by both geographic area and property type. The Company's segments by geographic area are: Greater Boston, Greater Washington D.C., midtown Manhattan, Greater San Francisco, and New Jersey and Pennsylvania. Segments by property type include: Class A Office, R&D, Industrial, Hotel, and Garage. Asset information by segment is not reported, since the Company does not use this measure to assess performance; therefore, the depreciation and amortization expenses are not allocated among segments. Interest income, management and development services, interest expense, and general and administrative expenses are not included in net operating, as the internal reporting addresses these on a corporate level. Information by Geographic Area and Property Type: For the year ended December 31, 1998: Greater Greater New Jersey Greater Washington, Midtown San and Grand Boston D.C. Manhattan Francisco Pennsylvania Totals -------- ----------- --------- --------- ------------ -------- Rental Revenues: Class A Office........ $ 94,284 $ 169,882 $ 129,644 $ 18,914 $17,407 $430,131 R&D................... 5,955 17,121 -- 1,502 -- 24,578 Industrial............ 1,611 1,431 -- 1,349 789 5,180 Hotels................ 25,944 -- -- -- -- 25,944 Garage................ 1,744 -- -- -- -- 1,744 -------- --------- --------- -------- ------- -------- Total............... 129,538 188,434 129,644 21,765 18,196 487,577 -------- --------- --------- -------- ------- -------- % of Grand Totals....... 26.57% 38.65% 26.59% 4.46% 3.73% 100.00% -------- --------- --------- -------- ------- -------- Rental Expenses: Class A Office........ 36,591 45,156 44,787 7,099 5,663 139,296 R&D 1,808 3,644 -- 395 -- 5,847 Industrial............ 525 316 -- 305 107 1,253 Hotels................ 3,562 -- -- -- -- 3,562 Garage................ 532 -- -- -- -- 532 -------- --------- --------- -------- ------- -------- Total............... 43,018 49,116 44,787 7,799 5,770 150,490 -------- --------- --------- -------- ------- -------- % of Grand Totals....... 28.59% 32.64% 29.76% 5.18% 3.83% 100.00% -------- --------- --------- -------- ------- -------- Net Operating Income.... $86,520 $139,318 $84,857 $13,966 $12,426 $337,087 ======== ========= ========= ======== ======= ======== % of Grand Totals....... 25.67% 41.33% 25.17% 4.14% 3.69% 100.00% ======== ========= ========= ======== ======= ======== F-14

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--continued (dollars in thousands, except per share amounts) For the year ended December 31, 1997 (includes operations of the Company and the Predecessor): Greater Greater New Jersey Greater Washington, Midtown San and Grand Boston D.C. Manhattan Francisco Pennsylvania Totals ------- ----------- --------- --------- ------------ -------- Rental Revenues: Class A Office........ $42,082 $87,688 $67,350 -- -- $197,120 R&D................... 5,420 7,848 -- $1,314 -- 14,582 Industrial............ 1,685 1,450 -- 1,082 $829 5,046 Hotels................ 14,611 -- -- -- -- 14,611 Garage................ 2,084 -- -- -- -- 2,084 Hotel Revenues.......... 31,185 -- -- -- -- 31,185 ------- ------- ------- ------ ---- -------- Total................. 97,067 96,986 67,350 2,396 829 264,628 ------- ------- ------- ------ ---- -------- % of Grand Totals....... 36.68% 36.65% 25.45% 0.91% 0.31% 100.00% ------- ------- ------- ------ ---- -------- Operating Expenses: Class A Office........ 13,445 23,659 23,341 -- -- 60,445 R&D................... 1,398 1,415 -- 452 -- 3,265 Industrial............ 531 324 -- 183 105 1,143 Hotels................ 1,737 -- -- -- -- 1,737 Garage................ 535 -- -- -- -- 535 Hotel Expenses.......... 22,452 -- -- -- -- 22,452 ------- ------- ------- ------ ---- -------- Total................. 40,098 25,398 23,341 635 105 89,577 ------- ------- ------- ------ ---- -------- % of Grand Totals....... 44.76% 28.35% 26.06% 0.71% 0.12% 100% ------- ------- ------- ------ ---- -------- Net Operating Income.... $56,969 $71,588 $44,009 $1,761 $724 $175,051 ======= ======= ======= ====== ==== ======== % of Grand Totals....... 32.54% 40.90% 25.14% 1.01% 0.41% 100.00% ======= ======= ======= ====== ==== ======== The following is a reconciliation of net operating income to income before minority interests: 1998 1997(/1/) -------- --------- Net operating income....................................... $337,087 $175,051 Add: Development and management services...................... 12,411 7,498 Interest income.......................................... 13,859 3,335 Less: General and administrative............................... (22,504) (11,805) Interest expense......................................... (124,860) (91,588) Depreciation and amortization............................ (75,418) (38,773) -------- -------- Income before minority interests........................... $140,575 $43,718 ======== ======== - -------- (1) Includes operations of the Company and the Predecessor. 10. Employee Benefit Plan Effective January 1, 1985, the Predecessor Group adopted a 401(k) Savings Plan (the "Plan") for its employees. Under the Plan, as amended, employees, as defined, are eligible to participate in the Plan after they F-15

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--continued (dollars in thousands, except per share amounts) have completed three months of service. In addition, participants may elect to make an after-tax contribution of up to 10% of their wages. Upon formation, the Company adopted the Plan and the terms of the Plan. The Plan provides that matching employer contributions are to be determined at the discretion of the Company. The Company matches 200% of the first 2% of pay (utilizing pay that is not in excess of $100). The cost to the Company and the Predecessor of this matching contribution for the year ended December 31, 1998, 1997 and 1996 was $583, $403 and $359, respectively. Participants are immediately vested in their pre-tax and after-tax contributions. Participants vest in the Company's and the Predecessor Group's matching contributions and earnings thereon over a five-year period. 11. Stock Option and Incentive Plan The Company has established a stock option and incentive plan for the purpose of attracting and retaining qualified directors, officers and employees and rewarding them for superior performance in achieving the Company's business goals and enhancing stockholder value. In conjunction with the Initial Offering, the Company granted options with respect to 2,290,000 common shares to directors, officers and employees. All of such options were issued at an exercise price of $25.00 per share. The term of each of option is 10 years from the date of grant. In general, one-third of each of the options granted to officers and the chairman of the board (the "Chairman") are exercisable on each of the third, fourth and fifth anniversary of the date of grant, respectively. One-third of the options granted to employees who are not officers will be exercisable on each of the first, second and third anniversary of the date of grant, respectively. Other than the options granted to the Chairman, one-half of the options granted to non-employee directors will be exercisable on each of the first and second anniversary of the date of grant, respectively. The Company sponsors a share-based incentive compensation. The Company applies Accounting Principles Bulletin Opinion No. 25 ("APB 25") and related Interpretations in accounting for its plan. Statement of Financial Accounting Standards No.123 ("SFAS 123") was issued by the Financial Accounting Standards Board in 1995 and, if fully adopted, changes the methods for recognition of cost on plans similar to that of the Company. Adoption of FAS 123 is optional; however, pro forma disclosure as if the Company adopted the cost recognition requirements under FAS 123 are presented below. The Company did not record any expense under APB 25. A summary of the status of the Company's stock options as of December 31, 1998 and 1997 and changes during the years ended December 31, 1998 and 1997 are presented below: Weighted Average Shares Exercise Price --------- ---------------- Outstanding at June 23, 1997..................... 2,290,000 $25.00 Granted.......................................... -- -- Exercised........................................ -- -- Cancelled........................................ (5,900) $25.00 --------- ------ Outstanding at December 31, 1997................. 2,284,100 $25.00 Granted.......................................... 3,621,663 $34.13 Exercised........................................ (1,034) $25.00 Cancelled........................................ (66,779) $31.61 --------- ------ Outstanding at December 31, 1998................. 5,837,950 $30.58 ========= ====== F-16

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--continued (dollars in thousands, except per share amounts) As of December 31, 1998, there were 9,127,602 shares authorized under the plan. The weighted average fair value of options granted during the year was $5.49 and $3.81 for the years ended December 31, 1998 and 1997, respectively. The fair value of each share option granted is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted- average assumptions for grants in 1998 and 1997: 1998 1997 ---- ---- Dividend yield........................................... 4.80% 6.26% Expected life of option.................................. 6 years 6 years Risk-free interest rate.................................. 5.58% 6.32% Expected stock price volatility.......................... 20% 20% The following table summarizes information about stock options outstanding at December 31, 1998: Options Outstanding Options Exercisable ------------------------------------------- -------------------------- Number Weighted Average Weighted Number Weighted Range of Outstanding Remaining Average Exercisable Average Exercise Prices at 12/31/98 Contractual Life Exercise Price at 12/31/98 Exercise Price --------------- ----------- ---------------- -------------- ----------- -------------- $25.00-- $34.75 5,837,950 9.66 $30.58 495,261 $25.00 The compensation cost under SFAS 123 for the stock performance-based plan would have been $6,847 and $999 in 1998 and 1997, respectively. Had compensation cost for the Company's 1997 grants for stock-based compensation plans been determined consistent with FAS 123, the Company's net income, and net income per common share for 1998 would approximate the pro forma amounts below: 1998 1997 ------- ------- Net income............................................... $86,265 $34,152 Net income per common share--basic....................... $ 1.42 $ 0.88 Net income per common share--diluted..................... $ 1.41 $ 0.87 The effects of applying FAS 123 in this pro forma disclosure are not indicative of future amounts. FAS 123 does not apply to future anticipated awards. 12. Commitments and Contingencies Legal Matters The Company is subject to various legal proceedings and claims that arise in the ordinary course of business. These matters are generally covered by insurance. Management believes that the final outcome of such matters will not have a material adverse effect on the financial position, results of operations or liquidity of the Company. Environmental Matters Some of the Properties are located in urban and industrial areas where fill or current or historical industrial uses of the areas have caused site contamination. With respect to all of the Properties, independent environmental consultants have been retained in the past to conduct or update Phase I environmental assessments (which generally do not involve invasive techniques such as soil or ground water sampling) and F-17

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--continued (dollars in thousands, except per share amounts) asbestos surveys on all of the Properties. These environmental assessments have not revealed any environmental conditions that the Company believes will have a material adverse effect on its business, assets or results of operations, and the Company is not aware of any other environmental condition with respect to any of the Properties which the Company believes would have such a material adverse effect. With respect to a property in Massachusetts, the Company received a Notice of Potential Responsibility from the state regulatory authority on January 9, 1997, related to groundwater contamination. In addition, the Company received a Notice of Downgradient Property Status Submittal from each of two third parties concerning alleged contamination at two downgradient properties. On January 15, 1997, the Company notified the state regulatory authority that the Company would cooperate with and monitor the tenant at the property (which investigated the matter and undertook remedial actions). That investigation identified the presence of hazardous substances in and near a catch basin along the property line. The tenant completed an Immediate Response Action at the site in April 1998. The Company expects the tenant will likewise take any additional necessary response actions. The lease with the tenant contains a provision pursuant to which the tenant indemnifies the Company against such liability. On January 15, 1992, another property in Massachusetts was listed by the state regulatory authority as an unclassified Confirmed Disposal Site in connection with groundwater contamination. The Company has engaged a specially licensed environmental consultant to perform the necessary investigation and assessment and to prepare submittals to the state regulatory authority. On August 1, 1997, such consultant submitted to the state regulatory authority a Phase I--Limited Site Investigation Report and Downgradient Property Status Opinion. This Opinion concluded that the property qualifies for Downgradient Property Status under the state regulatory program, which eliminates certain deadlines for conducting response actions at a site and may qualify the Company for liability relief under recent statutory amendments. Although the Company believes that the current or former owners of the upgradient source properties may ultimately be responsible for some or all of the costs of such response actions, the Company will take any necessary further response actions. An investigation at an additional property in Massachusetts identified groundwater contamination. The Company engaged a specially licensed environmental consultant to perform the necessary investigation and assessment and to prepare submittals to the state regulatory authority. On March 11, 1998, the consultant submitted to the state regulatory authority a Release Notification and Downgradient Property Status Opinion. This Opinion concluded that the property qualifies for Downgradient Property Status under the state regulatory program, which eliminates certain deadlines for conducting response actions at a site and may qualify the Company for liability relief under recent statutory amendments. Although the Company believes that the current or former owners of the upgradient source properties may ultimately be responsible for some or all of the costs of such response actions, the Company will take any necessary further response actions. The Company expects that any resolution of the environmental matters relating the above will not have a material impact on the financial position, results of operations or liquidity of the Company. Development The Company has entered into contracts for the construction and renovation of properties currently under development. Commitments under these arrangements totaled approximately $94,300 and $106,100 at December 31, 1998 and 1997, respectively. F-18

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--continued (dollars in thousands, except per share amounts) Sale of Property The Operating Partnership agreement provides that, until June 23, 2007, the Operating Partnership may not sell or otherwise transfer four designated properties in a taxable transaction without the prior written consent of the Chairman and the CEO. In connection with the acquisition or contribution of 31 other Properties, the Company entered into similar agreements for the benefit of the selling or contributing parties which specifically state the Company will not sell or otherwise transfer the Properties in a taxable transaction until a period ranging from June 2002 to November 2008. The Operating Partnership is not required to obtain the consent from a party protected thereby if such party does not continue to hold at least a specified percentage of such party's original Operating Partnership units. 13. Earnings Per Share Earnings per share is computed as follows: For the year ended December 31, 1998 ----------------------------------- Income Shares Per Share (Numerator) (Denominator) Amount ----------- ------------ --------- Basic Earnings: Income available to common shareholders... $93,112 60,776 $1.53 Effect of Dilutive Securities: Stock Options............................. 532 (.01) ------- ------ ----- Diluted Earnings: Income available to common shareholders... $93,112 61,308 $1.52 ======= ====== ===== For the period from June 23, 1997 to December 31, 1997 ------------------------------------------- Income Shares Per Share (Numerator) (Denominator) Amount ------------- -------------- ---------- Basic Earnings: Income available to common shareholders.................. $ 35,151 38,694 $ .91 Effect of Dilutive Securities: Stock Options.................. 414 (.01) ------------- ------------ ---------- Diluted Earnings: Income available to common shareholders.................. $ 35,151 39,108 $ .90 ============= ============ ========== 14. Selected Interim Financial Information (unaudited) 1998 ------------------------------------------------------- Quarter Ended Quarter Ended Quarter Ended Quarter Ended March 31, June 30, September 30, December 31, ------------- ------------- ------------- ------------- Revenues................ $95,603 $108,041 $140,177 $170,026 Income before minority interests.............. 26,228 34,430 36,087 43,830 Income before extraordinary item..... 19,631 26,357 25,341 27,271 Per share income before extraordinary item..... .36 .42 .40 .43 Net income.............. 19,631 29,921 25,341 18,226 Basic earnings per share.................. .36 .48 .40 .29 F-19

BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES PREDECESSOR GROUP NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--continued (dollars in thousands, except per share amounts) 15. Pro Forma Financial Information The following Pro Forma Condensed Statements of Income for the years ended December 31, 1998 and 1997 are presented as if the Initial Offering, the related formation transactions and the material property acquisitions subsequent to the Initial Offering had occurred on January 1, 1997. The pro forma information is based upon historical information and does not purport to present what actual results would have been had such transactions, in fact, occurred at January 1, 1997, or to project results for any future period. Pro Forma Condensed Statements of Income: Years ended December 31, ------------------------ 1998 1997 ------------ ------------ (Unaudited) Revenues...................................... $ 704,012 $ 638,548 Expenses...................................... $ 535,825 $ 522,700 Net income before extraordinary items......... $ 105,864 $ 61,323 Basic earnings per share (before extra- ordinary items............................... $ 1.67 $ .97 Diluted earnings per share (before extra- ordinary items).............................. $ 1.65 $ .96 16. Subsequent Events On January 21, 1999, the Company entered into a binding agreement to acquire the leasehold interest in the remaining two development sites in New York City's Times Square for approximately $312.25 million. The sites will support more than 2 million square feet of development. On February 10, 1999, the Company closed on phase two of its acquisition of Embarcadero Center. As a result, the Company owns 100% of the six buildings comprising the Embarcadero Center. The total purchase price (including both phases one and two) of approximately $1.2 billion was funded through the assumption or incurrence of $730.0 million of mortgage financing, the issuance of Preferred Units having an aggregate value of approximately $286.4 million, cash of $100.0 million from the proceeds from the sale of the Company's Series A Convertible Redeemable Preferred Stock, and a draw down of approximately $97.3 million on the Company's Unsecured Line of Credit. In connection with the acquisition of Embarcadero Center, the proceeds from the notes receivable of $420.1 million were used to discharge the notes payable. F-20

BOSTON PROPERTIES, INC. SCHEDULE 3--REAL ESTATE AND ACCUMULATED DEPRECIATION December 31, 1998 (dollars in thousands) Costs Capitalized Development Subsequent and to Land and Building and Construction Property Name Type Location Encumbrances Land Building Acquisition Improvements Improvements in Progress Total ------------- ------ ---------------- ------------ ------- -------- ----------- ------------ ------------ ------------ ------- 280 Park Avenue.......... Office New York, NY 220,000 125,288 201,115 11,690 125,288 212,805 -- 338,093 599 Lexington Avenue.......... Office New York, NY 225,000 81,040 100,507 71,487 81,040 171,994 -- 253,034 Riverfront Plaza........... Office Richmond, VA 119,992 18,000 156,733 587 18,000 157,320 -- 175,320 875 Third Avenue.......... Office New York, NY 153,807 74,880 139,151 844 74,880 139,995 -- 214,875 Democracy Center.......... Office Bethesda, MD -- 12,550 50,015 20,278 13,695 69,148 -- 82,843 100 East Pratt Street.......... Office Baltimore, MD 94,371 27,562 109,662 1,032 27,562 110,694 -- 138,256 Two Independence Square.......... Office Washington, DC 120,252 14,053 59,883 9,016 15,039 67,913 -- 82,952 Capital Gallery......... Office Washington, DC 59,103 4,725 29,560 12,417 4,730 41,972 -- 46,702 One Independence Square.......... Office Washington, DC 76,611 9,356 33,701 17,475 9,634 50,898 -- 60,532 2300 N Street... Office Washington, DC 66,000 16,509 22,415 12,820 16,509 35,235 -- 51,744 NIMA Building... Office Reston, VA 22,291 10,567 67,431 2 10,567 67,433 -- 78,000 Reston Corporate Center.......... Office Reston, VA 25,727 9,135 41,398 184 9,135 41,582 -- 50,717 Lockheed Martin Building........ Office Reston, VA 27,249 10,210 58,884 0 10,210 58,884 -- 69,094 500 E Street.... Office Washington, DC -- 109 22,420 11,027 1,569 31,987 -- 33,556 One Cambridge Center.......... Office Cambridge, MA -- 134 25,110 3,462 134 28,572 -- 28,706 University Place........... Office Cambridge, MA -- -- 37,091 -- -- 37,091 -- 37,091 Newport Office Park............ Office Quincy, MA 6,499 3,500 18,208 2 3,500 18,210 -- 21,710 Lexington Office Park............ Office Lexington, MA -- 998 1,426 10,368 1,072 11,720 -- 12,792 191 Spring Street.......... Office Lexington, MA 23,430 4,213 27,166 16,453 2,850 44,982 -- 47,832 Ten Cambridge Center.......... Office Cambridge, MA 40,000 1,299 12,943 4,428 1,868 16,802 -- 18,670 10 and 20 Burlington Mall Road............ Office Burlington, MA 16,613 930 6,928 8,371 939 15,290 -- 16,229 Waltham Office Center.......... Office Waltham, MA -- 422 2,719 3,214 425 5,930 -- 6,355 Montvale Center.......... Office Gaithersburg, MD 7,792 1,574 9,786 3,881 2,399 12,842 -- 15,241 91 Hartwell Avenue.......... Office Lexington, MA 11,322 784 6,464 2,410 784 8,874 -- 9,658 Three Cambridge Center.......... Office Cambridge, MA -- 174 12,200 803 174 13,003 -- 13,177 201 Spring Street.......... Office Lexington, MA -- 2,695 11,712 2,632 2,695 14,344 -- 17,039 Bedford Business Park............ Office Bedford, MA 22,667 534 3,403 12,936 534 16,339 -- 16,873 Eleven Cambridge Center.......... Office Cambridge, MA -- 121 5,535 504 121 6,039 -- 6,160 33 Hayden Avenue.......... Office Lexington, MA -- 266 3,234 76 266 3,310 -- 3,576 Decoverly Two... Office Rockville, MD -- 1,994 8,814 46 1,994 8,860 -- 10,854 Decoverly Three........... Office Rockville, MD -- 2,220 9,044 0 2,220 9,044 -- 11,264 170 Tracer Lane............ Office Waltham, MA -- 398 4,601 1,288 418 5,869 -- 6,287 32 Hartwell Avenue.......... Office Lexington, MA -- 168 1,943 2,724 168 4,667 -- 4,835 Accumulated Year (s) Built/ Depreciable Property Name Depreciation Renovated Lives (Years) ------------- ------------ --------------- ------------- 280 Park Avenue.......... 7,113 1968/95-96 (1) 599 Lexington Avenue.......... 69,706 1986 (1) Riverfront Plaza........... 3,679 1990 (1) 875 Third Avenue.......... 3,768 1982 (1) Democracy Center.......... 23,628 1985-88/94-96 (1) 100 East Pratt Street.......... 3,474 1975/1991 (1) Two Independence Square.......... 12,990 1992 (1) Capital Gallery......... 17,246 1981 (1) One Independence Square.......... 13,277 1991 (1) 2300 N Street... 10,932 1986 (1) NIMA Building... 1,545 1987/1988 (1) Reston Corporate Center.......... 948 1984 (1) Lockheed Martin Building........ 1,349 1987/1988 (1) 500 E Street.... 13,038 1987 (1) One Cambridge Center.......... 9,940 1987 (1) University Place........... 479 1985 (1) Newport Office Park............ 683 1988 (1) Lexington Office Park............ 4,541 1982 (1) 191 Spring Street.......... 11,905 1971/1995 (1) Ten Cambridge Center.......... 6,324 1990 (1) 10 and 20 Burlington Mall Road............ 5,567 1984-1989/95-96 (1) Waltham Office Center.......... 3,044 1968-1970/87-88 (1) Montvale Center.......... 3,465 1987 (1) 91 Hartwell Avenue.......... 3,029 1985 (1) Three Cambridge Center.......... 3,887 1987 (1) 201 Spring Street.......... 414 1997 (1) Bedford Business Park............ 7,166 1980 (1) Eleven Cambridge Center.......... 2,430 1984 (1) 33 Hayden Avenue.......... 1,531 1979 (1) Decoverly Two... 202 1987 (1) Decoverly Three........... -- 1989 (1) 170 Tracer Lane............ 2,804 1980 (1) 32 Hartwell Avenue.......... 2,845 1968-1979/1987 (1) F-21

BOSTON PROPERTIES, INC. SCHEDULE 3--REAL ESTATE AND ACCUMULATED DEPRECIATION December 31, 1998 (dollars in thousands) Costs Capitalized Development Subsequent and to Land and Building and Construction Property Name Type Location Encumbrances Land Building Acquisition Improvements Improvements in Progress ------------- ------ ----------------- ------------ ------- -------- ----------- ------------ ------------ ------------ 195 West Street.......... Office Waltham, MA -- 1,611 6,652 621 1,611 7,273 -- 92-100 Hayden Avenue.......... Office Lexington, MA 9,065 594 6,748 880 595 7,627 -- 204 Second Avenue.......... Office Waltham, MA -- 37 2,402 632 37 3,034 -- 8 Arlington Street.......... Office Boston, MA -- 90 1,988 61 90 2,049 -- Carnegie Center/Tower One............. Office New Jersey 63,693 70,146 216,061 43 70,146 216,104 -- Candler Building........ Office Baltimore, MD -- 12,500 48,734 4 12,500 48,738 -- Metropolitan Square.......... Office Washington, DC 107,386 35,000 151,709 424 35,000 152,133 -- Prudential Center.......... Office Boston, MA 298,686 131,850 443,180 9,083 131,850 449,584 2,679 Reservoir Place........... Office Waltham, MA 77,006 18,207 88,018 3 18,207 88,021 -- Embarcadero Center.......... Office San Francisco, CA 729,637 211,297 996,442 -- 211,297 996,422 -- 910 Clopper Road............ Office Gaithersburg, MD -- 2,000 15,448 -- 2,000 15,448 -- Fullerton Square.......... Office Springfield, VA -- 3,045 11,522 -- 3,045 11,522 -- 7450 Boston Boulevard, Building Three.. Office Springfield, VA -- 1,165 4,681 27 1,165 4,708 -- Hilltop Business Center.......... Office San Francisco, CA 4,417 53 492 356 53 848 -- 7435 Boston Boulevard, Building One.... Office Springfield, VA -- 392 3,822 1,973 486 5,701 -- 7601 Boston Boulevard, Building Eight.. Office Springfield, VA -- 200 878 3,505 378 4,205 -- 8000 Grainger Court, Building Five............ Office Springfield, VA -- 366 4,282 966 453 5,161 -- 7700 Boston Boulevard, Building Twelve.......... Office Springfield, VA -- 1,105 1,042 8,046 1,105 9,088 -- 7500 Boston Boulevard, Building Six.... Office Springfield, VA -- 138 3,749 244 273 3,858 -- 7501 Boston Boulevard, Building Seven.. Office Springfield, VA -- 665 878 8,407 665 9,285 -- 7600 Boston Boulevard, Building Nine... Office Springfield, VA -- 127 2,839 1,540 189 4,317 -- Fourteen Cambridge Center.......... Office Cambridge, MA -- 110 4,483 569 110 5,052 -- 164 Lexington Road............ Office Billerica, MA -- 592 1,370 131 592 1,501 -- 930 Clopper Road............ Office Gaithersburg, MD -- 1,200 6,506 -- 1,200 6,506 -- Sugarland Building Two.... Office Herndon, VA -- 834 3,216 1,463 834 4,679 -- 7374 Boston Boulevard, Building Four... Office Springfield, VA -- 241 1,605 423 303 1,966 -- Sugarland Building One.... Office Herndon, VA -- 735 2,739 2,577 735 5,316 -- 8000 Corporate Court, Building Eleven.......... Office Springfield, VA -- 136 3,071 109 214 3,096 6 7451 Boston Boulevard, Building Two.... Office Springfield, VA -- 249 1,542 1,430 535 2,686 -- 17 Hartwell Avenue.......... Office Lexington, MA -- 26 150 596 26 746 -- Accumulated Year(s) Built/ Depreciable Property Name Total Depreciation Renovated Lives (Years) ------------- --------- ------------ -------------- ------------- 195 West Street.......... 8,884 1,692 1990 (1) 92-100 Hayden Avenue.......... 8,222 2,946 1985 (1) 204 Second Avenue.......... 3,071 1,431 1981/1993 (1) 8 Arlington Street.......... 2,139 2,032 1860-1920/1989 (1) Carnegie Center/Tower One............. 286,250 2,700 1983-1998 (1) Candler Building........ 61,238 545 1911/1990 (1) Metropolitan Square.......... 187,133 1,813 1982/1986 (1) Prudential Center.......... 584,113 5,537 1965/1993 (1) Reservoir Place........... 106,228 379 1955/1987 (1) Embarcadero Center.......... 1,207,719 3,436 1924/1989 (1) 910 Clopper Road............ 17,448 354 1982 (1) Fullerton Square.......... 14,567 264 1987 (1) 7450 Boston Boulevard, Building Three.. 5,873 63 1987 (1) Hilltop Business Center.......... 901 1,305 early 1970's (1) 7435 Boston Boulevard, Building One.... 6,187 2,075 1982 (1) 7601 Boston Boulevard, Building Eight.. 4,583 1,491 1986 (1) 8000 Grainger Court, Building Five............ 5,614 1,735 1984 (1) 7700 Boston Boulevard, Building Twelve.......... 10,193 273 1997 (1) 7500 Boston Boulevard, Building Six.... 4,131 1,383 1985 (1) 7501 Boston Boulevard, Building Seven.. 9,950 319 1997 (1) 7600 Boston Boulevard, Building Nine... 4,506 1,572 1987 (1) Fourteen Cambridge Center.......... 5,162 1,814 1983 (1) 164 Lexington Road............ 2,093 115 1982 (1) 930 Clopper Road............ 7,706 149 1989 (1) Sugarland Building Two.... 5,513 162 1986/1997 (1) 7374 Boston Boulevard, Building Four... 2,269 768 1984 (1) Sugarland Building One.... 6,051 321 1985/1997 (1) 8000 Corporate Court, Building Eleven.......... 3,316 825 1989 (1) 7451 Boston Boulevard, Building Two.... 3,221 1,717 1982 (1) 17 Hartwell Avenue.......... 772 463 1968 (1) F-22

BOSTON PROPERTIES,INC. SCHEDULE 3--REAL ESTATE AND ACCUMULATED DEPRECIATION December 31, 1998 (dollars in thousands) Costs Capitalized Development Subsequent and to Land and Building and Construction Property Name Type Location Encumbrances Land Building Acquisition Improvements Improvements in Progress ------------- ----------- ----------------- ------------ ----- -------- ----------- ------------ ------------ ------------ 7375 Boston Boulevard, Building Ten.... Office Springfield, VA -- 23 2,685 627 47 3,288 -- 2391 West Winton Avenue.......... Industrial Hayward, CA -- 182 1,217 606 182 1,823 -- 40-46 Harvard Street.......... Industrial Westwood, MA -- 351 1,782 1,327 351 3,109 -- 38 Cabot Boulevard....... Industrial Bucks County, PA -- 329 1,238 2,037 329 3,275 -- 6201 Columbia Park Road, Building Two.... Industrial Landover, MD -- 505 2,746 1,146 960 3,437 -- 2000 South Club Drive, Building Three........... Industrial Landover, MD -- 465 2,125 729 859 2,460 -- 25-33 Dartmouth Street.......... Industrial Westwood, MA -- 273 1,596 495 273 2,091 -- 1950 Stanford Court, Building One............. Industrial Landover, MD -- 269 1,554 196 350 1,669 -- 560 Forbes Boulevard....... Industrial San Francisco, CA -- 48 435 262 48 697 -- 430 Rozzi Place........... Industrial San Francisco, CA -- 24 217 119 24 336 -- Long Wharf Marriott........ Hotel Boston, MA -- 1,752 31,904 8,535 1,752 40,439 -- Cambridge Center Marriott........ Hotel Cambridge, MA -- 478 37,918 4,018 478 41,936 -- Cambridge Center North Garage.... Garage Cambridge, MA -- 1,163 11,633 8 1,163 11,641 -- 1301 New York Ave............. Development Washington, DC 24,965 9,250 18,750 4,155 9,250 18,750 4,155 Cambridge Master Plan............ Development Cambridge, MA -- -- -- 3,542 1,117 4 2,421 Virginia Master Plan............ Development Springfield, VA -- -- -- 1,520 655 175 690 Maryland Master Plan............ Development Landover, MD -- -- -- 506 464 -- 42 Cambridge Center Eight........... Development Cambridge, MA -- -- -- 15,937 1,046 -- 14,891 181 Spring Street.......... Development Lexington, MA -- -- -- 9,000 1,685 -- 7,315 Residence Inn by Marriott........ Development Cambridge, MA -- -- -- 22,243 816 -- 21,427 Andover Tech Center.......... Development Andover, MA -- -- -- 5,299 4,300 -- 999 200 West Street.......... Development Waltham, MA -- -- -- 26,278 13,119 -- 13,159 Decoverly Four.. Development Rockville, MD -- -- -- 1,749 1,650 -- 99 Decoverly Five.. Development Rockville, MD -- -- -- 1,706 1,665 -- 41 Decoverly Six... Development Rockville, MD -- -- -- 2,028 1,979 -- 49 Decoverly Seven........... Development Rockville, MD -- -- -- 5,067 4,521 -- 546 12050 Sunset Hills Road...... Development Reston, VA -- -- -- 5,415 4,714 -- 701 12280 Sunrise Valley Drive.... Development Reston, VA -- -- -- 3,824 3,593 -- 231 Arboretum....... Development Reston, VA -- -- -- 10,369 2,850 -- 7,519 Tower Oaks...... Development Rockville, MD -- -- -- 26,403 24,652 -- 1,751 Washingtonian North........... Development Gaithersburg, MD -- -- -- 16,834 11,770 -- 5,064 Broad Run Business Park... Development Loudon County, VA -- -- -- 5,641 5,457 -- 184 Accumulated Year(s)Built/ Depreciable Property Name Total Depreciation Renovated Lives (Years) ------------- ------ ------------ ------------- ------------- 7375 Boston Boulevard, Building Ten.... 3,335 1,039 1988 (1) 2391 West Winton Avenue.......... 2,005 972 1974 (1) 40-46 Harvard Street.......... 3,460 2,724 1967/1996 (1) 38 Cabot Boulevard....... 3,604 2,410 1972/1984 (1) 6201 Columbia Park Road, Building Two.... 4,397 981 1986 (1) 2000 South Club Drive, Building Three........... 3,319 848 1988 (1) 25-33 Dartmouth Street.......... 2,364 1,343 1966/1996 (1) 1950 Stanford Court, Building One............. 2,019 537 1986 (1) 560 Forbes Boulevard....... 745 874 early 1970's (1) 430 Rozzi Place........... 360 69 early 1970's (1) Long Wharf Marriott........ 42,191 16,685 1982 (1) Cambridge Center Marriott........ 42,414 12,240 1986 (1) Cambridge Center North Garage.... 12,804 2,638 1990 (1) 1301 New York Ave............. 32,155 -- 1983/1998 N/A Cambridge Master Plan............ 3,542 2 Various N/A Virginia Master Plan............ 1,520 175 Various N/A Maryland Master Plan............ 506 -- Various N/A Cambridge Center Eight........... 15,937 -- Various N/A 181 Spring Street.......... 9,000 -- Various N/A Residence Inn by Marriott........ 22,243 -- 1999 (1) Andover Tech Center.......... 5,299 -- Various N/A 200 West Street.......... 26,278 -- Various N/A Decoverly Four.. 1,749 -- Various N/A Decoverly Five.. 1,706 -- Various N/A Decoverly Six... 2,028 -- Various N/A Decoverly Seven........... 5,067 -- Various N/A 12050 Sunset Hills Road...... 5,415 -- Various N/A 12280 Sunrise Valley Drive.... 3,824 -- Various N/A Arboretum....... 10,369 -- Various N/A Tower Oaks...... 26,403 -- Various N/A Washingtonian North........... 16,834 -- Various N/A Broad Run Business Park... 5,641 -- Various N/A F-23

BOSTON PROPERTIES, INC. SCHEDULE 3--REAL ESTATE AND ACCUMULATED DEPRECIATION December 31, 1998 (dollars in thousands) Costs Development Capitalized and Subsequent to Land and Building and Construction Property Name Type Location Encumbrances Land Building Acquisition Improvements Improvements in Progress ------------- ----------- ----------- ------------ -------- ---------- ------------- ------------ ------------ ------------ New Dominion Tech Park....... Development Herndon, VA -- -- -- 7,830 7,396 -- 434 $2,653,581 $946,231 $3,453,231 $482,021 $1,045,628 $3,751,452 $84,403 ========== ======== ========== ======== ========== ========== ======= Accumulated Year (s) Built/ Depreciable Property Name Total Depreciation Renovated Lives (Years) ------------- ---------- ------------ --------------- ------------- New Dominion Tech Park....... 7,830 -- Various N/A $4,881,483 $336,165 ========== ============ - ----- (1) Depreciation of the buildings and improvements are calculated over lives ranging from the life of the lease to 40 years. (2) The aggregate cost and accumulated depreciation for tax purposes was approximately $4,000,000 and $411,000, respectively. F-24

BOSTON PROPERTIES, INC. REAL ESTATE AND ACCUMULATED DEPRECIATION December 31, 1998 (dollars in thousands) A summary of activity for real estate and accumulated depreciation is as follows: 1998 1997 1996 ---------- ---------- ---------- Real Estate: Balance at the beginning of the year..... $1,754,780 $1,001,537 $ 979,493 Additions to and improvements of real estate................................ 3,129,121 754,185 28,110 Write-off of fully depreciated assets.. (2,418) (942) (6,066) ---------- ---------- ---------- Balance at the end of the year........... $4,881,483 $1,754,780 $1,001,537 ========== ========== ========== Accumulated Depreciation: Balance at the beginning of the year..... $ 266,987 $ 238,469 $ 215,303 Depreciation expense................... 71,596 29,460 29,232 Write-off of fully depreciated assets.. (2,418) (942) (6,066) ---------- ---------- ---------- Balance at the end of the year........... $ 336,165 $ 266,987 $ 238,469 ========== ========== ========== F-25

Exhibit 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We consent to the incorporation by reference in the registration statements of Boston Properties, Inc. on Forms S-3 (File Numbers 333-60219, 333-61799, 333- 68379, 333-69375 and 333-70765) and on Forms S-8 (File Numbers 333-52845 and 333-70321) of our report dated January 24, 1999, except for Note 16, for which the date is February 10, 1999, on our audits of the consolidated financial statements of Boston Properties, Inc. as of December 31, 1998 and 1997, and for the year ended December 31, 1998 and the period from June 23, 1997 to December 31, 1997 and our audits of the combined financial statements of the Boston Properties Predecessor Group for the period from January 1, 1997 to June 22, 1997 and for the year ended December 31, 1996, which is included in the Annual Report on Form 10-K filed on March 31, 1999 and on Form 10-K/A filed on April 5, 1999. April 5, 1999

5 1,000 YEAR DEC-31-1998 JAN-01-1998 DEC-31-1998 12,166 0 40,830 0 0 0 4,917,193 75,418 5,235,087 0 0 0 0 635 947,846 5,235,087 487,577 513,847 0 0 0 0 124,860 0 0 98,593 0 (5,481) 0 93,112 1.53 1.52