UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

Current Report Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) April 13, 2005

PS BUSINESS PARKS, INC.
(Exact name of registrant as specified in its charter)

California
(State or Other Jurisdiction
       of Incorporation)
  1-10709
(Commission File Number)
 
  95-4300881
   (I.R.S. Employer
Identification Number)

701 Western Avenue, Glendale, California 91201-2397

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code: (818) 244-8080

N/A

(Former name or former address, if changed since last report)

  |_| Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

  |_| Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

  |_| Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

  |_| Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))


Item 7.01. Regulation FD Disclosure

  On April 12, 2005, the Company announced they will release first quarter 2005 earnings and host quarterly conference call. The information in this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, except as expressly set forth by specific reference in such a filing.

Item 9.01. Financial Statements and Exhibits

(c)       Exhibits

            The following exhibit relating to Item 7.01 shall be deemed to be furnished, and not filed:

            99.1    Press release dated April 12, 2005.


SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

PS BUSINESS PARKS, INC.

Date: April 13, 2005
By: /s/ Edward A. Stokx
Edward A. Stokx
Chief Financial Officer


News Release

PS Business Parks, Inc.
701 Western Avenue
Glendale, CA 91201-2349
www.psbusinessparks.com

For Release:     Immediately
Date:                 April 12, 2005
Contact:           Mr. Edward A. Stokx
                          (818)244-8080, Ext. 649

PS Business Parks, Inc. to Release First Quarter 2005 Earnings and Host Quarterly Conference Call

GLENDALE, California — PS Business Parks, Inc. (AMEX: PSB) announced today that it intends to release its first quarter 2005 earnings after the close of business on Tuesday, May 3, 2005.

A conference call is scheduled for Wednesday, May 4, 2005, at 10:00 A.M. (PDT) to discuss the first quarter results. The toll free number is 1-800-399-4409; the conference ID is 5524556. The call will also be available via a live webcast on the Company’s website. A replay of the conference call will be available through May 11, 2005 at 1-800-642-1687. A replay of the conference call webcast will also be available on the Company’s website.

Company Information

PSB is a self-advised and self-managed equity real estate investment trust that acquires, develops, owns and operates commercial properties, primarily flex, multi-tenant office and industrial space. The Company defines “flex” space as buildings that are configured with a combination of office and warehouse space and can be designed to fit a number of uses (including office, assembly, showroom, laboratory, light manufacturing and warehouse space). As of March 31, 2005, PSB wholly owned approximately 17.9 million net rentable square feet of commercial space with approximately 3,700 customers located in eight states, concentrated primarily in California (5.1 million sq. ft.), Texas (2.9 million sq. ft.), Florida (3.3 million sq. ft.), Oregon (1.9 million sq. ft.), Virginia (2.8 million sq. ft.) and Maryland (1.2 million sq. ft.).

Additional information about PS Business Parks, Inc. is available on the Internet. The Company's web site is www.psbusinessparks.com.