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Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

        We hereby consent to the incorporation by reference in the Registration Statement on Form S-3 (No. 333-59766, No. 333-36740, No. 333-60379, No. 333-85210, No. 333-132958, No. 333-137031, No. 333-137894, No. 333-141334 and No. 333-141705) and S-8 (No. 333-87384, No. 333-88711, No. 333-111736, No. 333-118096 and No. 333-118097) 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 this Form 10-K.

/s/  PRICEWATERHOUSECOOPERS LLP

PricewaterhouseCoopers LLP
Baltimore, MD
February 29, 2008

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Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM