Item 7.01. Regulation FD Disclosure

On August 14, 2009, PS Business Parks, Inc. issued a press release announcing the closing of a previously-announced public offering of its common stock and contemporaneous sale of common stock to Public Storage. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K. The information in this Item 7.01 and in Exhibit 99.1 are being "furnished" in accordance with General Instruction B.2 of Form 8-K and 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 they 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.

(d) Exhibits

Exhibit 99.1: Press release dated August 14, 2009, announcing closing of previously-announced public offering of common stock and sale of common stock to Public Storage.