Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of Corporate Office Properties Trust of our report dated February 29, 2008 relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in Corporate Office Properties Trust’s Annual Report on Form 10-K for the year ended December 31, 2007.

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Baltimore, Maryland

May 22, 2008