Boston Properties Announces Tax Treatment of Its 2005 Distributions

January 10, 2006

BOSTON, Jan. 10 /PRNewswire-FirstCall/ -- Boston Properties, Inc. (NYSE: BXP), a real estate investment trust, announced today the following tax treatment of its 2005 distributions.

                                                          2005      2005
                         Total      2005    2005 Total  Unrecap.  Nontaxable
    Record    Payable Distribution Taxable   Capital     Section Distribution
     Date      Date    per Share   Ordinary   Gain        1250    (Return of
                                   Dividend Distribution Gain(1)   Capital)
    Common Stock (CUSIP #101121101)
    Ticker Symbol:  BXP

    12/31/04  1/31/05  $0.65     $0.229948  $0.268477  $0.107365 $0.151575
     3/31/05  4/29/05   0.65      0.229694  $0.268182   0.107246  0.152124
     6/30/05  7/29/05   0.68      0.238221  $0.278139   0.111228  0.163640
     9/30/05  10/31/05  3.18      1.103170  $1.288017   0.515080  0.788813

    Totals          $5.16      $1.801033    $2.102815   $0.840919 $1.256152
                      100 %    34.903740 %  40.752229 %           24.344031 %

    (1) Unrecaptured Section 1250 Gain is a subset of, and included in, the
        2005 Total Capital Gain Distribution amount.

The distributions payable on January 30, 2006 to shareholders of record on December 30, 2005 are considered 2006 distributions for federal income tax purposes. Shareholders are encouraged to consult with their personal tax advisors as to their specific tax treatment of Boston Properties distributions.

Boston Properties is a fully integrated, self-administered, and self- managed real estate investment trust that develops, redevelops, acquires, manages, operates, and owns a property portfolio primarily comprised of Class- A office space and two hotels. The Company is one of the largest owners and developers of Class-A office properties in the United States, concentrated in five markets - Boston, Midtown Manhattan, Washington, D.C., San Francisco, and Princeton, N.J.

For more information about Boston Properties, please visit the Company's web site at www.bostonproperties.com

CONTACT:
Arthur Flashman, VP and Controller
Boston Properties
+1-617-236-3300

Marilynn Meek - General Info.
+1-212-827-3773
Financial Relations Board for Boston Properties