Aug. 29, 2006 -- Corporate Office Properties Trust (COPT) announced today that the Company will redeem all of its 1,425,000 outstanding 9.875% Series F Cumulative Redeemable Preferred Shares (NYSE:OFCPrF), at a price of $25.00 per Series F Preferred Share. There will be no accrued and unpaid dividends on the date of redemption. The redemption date for the Series F Preferred Shares will be October 15, 2006. The Notice of Redemption and related materials have already been mailed to holders of record of the Series F Preferred Shares. Wells Fargo Shareowner Services is acting as the redemption agent. Requests for additional copies of the materials should be directed to Mary Ellen Fowler, Vice President, Finance and Investor Relations, at 443-285-5450.

QUANTUMONLINE.COM SECURITY DESCRIPTION:  Corporate Office Properties Trust, 9 7/8% Series F Cumulative Redeemable Preferred Shares, liquidation preference $25.00 per share, redeemable at the issuer's option on or after 10/15/2006 at $25 per share plus accrued and unpaid dividends, with no stated maturity, and with distributions of 9 7/8% ($2.46875) per annum paid quarterly on 1/15, 4/15, 7/15 & 10/15 to holders of record on the date fixed by the board, not more than 60 days or less than 10 days prior to the payment date. In regards to payment of dividends and upon liquidation, the preferred shares rank equally with other preferreds and senior to the common shares of the company. See the IPO prospectus for further information on the preferred stock by clicking on the ‘Link to IPO Prospectus’ provided below.

Stock Exchange	Cpn Rate Ann Amt	LiqPref CallPrice	Call Date Matur Date	Moodys/S&P Dated	Distribution Dates	15% Tax Rate
NYSE Chart	9.88% $2.46875	$25.00 $25.00	Called for 10/15/2006 None	NF NF 2/21/2006	1/15, 4/15, 7/15 & 10/15 Click for MW ExDiv Date Click for Yahoo ExDiv Date	No

Company's Online Information Links

HOME PAGE:     http://www.copt.com/
Company's Investor Relations Information	Go to Investor Relations Information
Company's Online News Releases	Go to News Releases
Online Company Profile	Go to Online Profile

Company's Online SEC EDGAR Filings

Company's SEC EDGAR Filings

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Company's Email Address Links

Inv Rel Email Address	ir@copt.com
General Email Address	info@copt.com
Email Contact Form on Website	Go to Email Form

Address and Phone Numbers

Address:   8815 Centre Park Drive, Suite 400, Columbia, MD 21045
Main Phone Number	410-730-9092
Fax Number	410-740-1174
Investor Relations   Mary Ellen Fowler	410-992-7324
Toll Free Phone Number	Unknown

CEO - Randall M. Griffin

CFO - Roger A. Waesche