FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * NORVILLE E MITCHELL   2. Issuer Name and Ticker or Trading Symbol BOSTON PROPERTIES INC [BXP] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) EVP for Operations (Last) (First) (Middle) C/O BOSTON PROPERTIES, INC., 111 HUNTINGTON AVENUE 3. Date of Earliest Transaction (Month/Day/Year) 04/06/2006 (Street) BOSTON, MA 02199 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock, $.01 par value 04/06/2006   M   25,903 A $ 33.18 (1) (2) 44,705.1741 (5) D   Common Stock, $.01 par value 04/06/2006   M   64,758 A $ 32.22 (1) (3) 109,463.1741 D   Common Stock, $.01 par value 04/06/2006   M   24,871 A $ 29.38 (1) (4) 134,334.1741 D   Common Stock, $.01 par value 04/06/2006   S   115,532 D $ 93.15 18,802.1741 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Employee Stock Option (right to buy)

$ 33.18 (1) (2)

04/06/2006

M

25,903

(6)

03/24/2008

Common Stock

25,903 (1) (2)

$ 0

0

D

Employee Stock Option (right to buy)

$ 32.22 (1) (3)

04/06/2006

M

64,758

(7)

02/09/2009

Common Stock

64,758 (1) (3)

$ 0

0

D

Employee Stock Option (right to buy)

$ 29.38 (1) (4)

04/06/2006

M

24,871

(8)

01/24/2010

Common Stock

24,871 (1) (4)

$ 0

33,411

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
NORVILLE E MITCHELL C/O BOSTON PROPERTIES, INC. 111 HUNTINGTON AVENUE BOSTON, MA 02199			EVP for Operations

Signatures

/s/ Kelli A. DiLuglio, as Attorney-in-Fact		04/06/2006
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	In October 2005, the issuer paid a special dividend of $2.50 per share of common stock to all stockholders of record as of the close of business on September 30, 2005. In connection with this special dividend, the issuer's Board of Directors adjusted all options that were awarded, but not exercised, prior to the ex-dividend date for the special dividend to account for the effect of the special dividend. The number of shares subject to each such option was increased and the exercise price correspondingly decreased such that each option had the same fair value to the holder before and after giving effect to the payment of the special dividend.
(2)	Pursuant to the adjustment discussed in Footnote 1, the number of shares underlying the options increased by 903 from 25,000 to 25,903 and the per share exercise price was correspondingly decreased.
(3)	Pursuant to the adjustment discussed in Footnote 1, the number of shares underlying the options increased by 2,258 from 62,500 to 64,758 and the per share exercise price was correspondingly decreased.
(4)	Pursuant to the adjustment discussed in Footnote 1, the number of shares underlying the options increased by 2,032 from 56,250 to 58,282 and the per share exercise price was correspondingly decreased.
(5)	Includes 78.9526 shares that the Reporting Person acquired pursuant to the Boston Properties, Inc. 1999 Non-Qualified Employee Stock Purchase Plan in January 2006.
(6)	The options vested in three equal annual installments beginning on March 24, 1999.
(7)	The options vested in three equal annual installments beginning on February 9, 2000.
(8)	The options vested in three equal annual installments beginning on January 24, 2001.

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