Ownership Submission
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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(Print or Type Responses)
1. Name and Address of Reporting Person *
KILROY JOHN B SR
   2. Issuer Name and Ticker or Trading Symbol
KILROY REALTY CORP [NYSE: KRC] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
12200 WEST OLYMPIC BOULEVARD, SUITE 200		 3. Date of Earliest Transaction (Month/Day/Year)
03/29/2005
(Street)

LOS ANGELES, CA 90064		 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, par value $0.01 per share 03/29/2005   P   364,200 (1) A (2) 364,200 I By Kilroy Industries
Common stock, par value $0.01 per share               2,938 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
Common Limited Partnership Units of Kilroy Realty, L.P. (3) 03/29/2005   P   600,052 (1)   01/31/1999   (4) Common Stock 600,052 (2) 605,533 (5) I By Kilroy Industries, Kilroy Technologies LLC and Kilroy Airport Imperial Co.
Common Limited Partnership Units of Kilroy Realty, L.P. (3)             04/15/1999   (4) Common Stock 247,602   247,602 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
KILROY JOHN B SR
12200 WEST OLYMPIC BOULEVARD
SUITE 200
LOS ANGELES, CA 90064		   X      

Signatures

 /s/ Tyler H. Rose, as attorney-in-fact for John B. Kilroy, Sr.   03/29/2005
**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) Transfer represents the increase in the beneficial ownership interest in the referenced security as a result of an increase in Mr. Kilroy's interest in Kilroy Industries, the record owner of the referenced securities.
(2) The reported securities are held by Kilroy Industries. On March 29, 2005, the reporting person purchased the entire outstanding interest in Kilroy Industries that he did not already own. The amount of the purchase price attributable to the reported securities is indeterminate.
(3) Common Limited Partnership Units of Kilroy Realty, L.P. may be redeemed, at the option of Kilroy Realty Corporation, for shares of Kilroy Realty Corporation common stock on a one-for-one basis.
(4) There is no expiration date related to the redemption of Common Limited Partnership Units of Kilroy Realty, L.P. for shares of Kilroy Realty Corporation Common Stock.
(5) Includes (a) 4,348 Common Limited Partnership Units owned by Kilroy Technologies LLC (for which Mr. Kilroy disclaims beneficial ownership except to the extent of his interest in Kilroy Technologies LLC), (b) 1,133 Common Limited Partnership Units owned by Kilroy Airport Imperial Co. (for which Mr. Kilroy disclaims beneficial ownership except to the extent of his interest in Kilroy Airport Imperial Co.), and (c) 600,052 Common Limited Partnership Units owned by Kilroy Industries.

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