EXHIBIT 12.2

Corporate Office Properties, L.P.

Ratio of Earnings to Fixed Charges

(Dollars in thousands)

		Years Ended December 31,
Earnings:		2015				2014				2013				2012				2011
Income (loss) from continuing operations before equity in income (loss) of unconsolidated entities and income taxes		$	120,812			$	34,590			$	36,704			$	8,894			$	(85,574	)
Gain on sales of real estate, excluding discontinued operations		68,047				10,671				9,016				21				2,732
Fixed charges (from below)		96,867				99,243				99,676				111,825				122,397
Amortization of capitalized interest		2,591				2,374				1,977				1,798				1,610
Distributed income (loss) of equity investees		361				225				1,857				—				(31		)
Subtract:
Capitalized interest (from below)		(7,151		)		(6,065		)		(8,785		)		(13,903		)		(17,400		)
Preferred distributions of other consolidated entities		(16		)		(16		)		(16		)		—				—
Total earnings		$	281,511			$	141,022			$	140,429			$	108,635			$	23,734
Fixed charges:
Interest expense on continuing operations		$	89,074			$	92,393			$	82,010			$	86,401			$	90,037
Interest expense on discontinued operations		—				—				8,221				10,397				14,264
Capitalized interest (internal and external)		7,151				6,065				8,785				13,903				17,400
Amortization of debt issuance costs-capitalized		8				186				144				649				183
Interest included in rental expense		618				583				500				475				513
Preferred distributions of other consolidated entities		16				16				16				—				—
Total fixed charges		$	96,867			$	99,243			$	99,676			$	111,825			$	122,397
Ratio of earnings to fixed charges		2.91				1.42				1.41				0.97				0.19
														$	3,190			$	98,663

For purposes of calculating the above ratios, earnings were computed by adding fixed charges (excluding capitalized interest), gain on sales of real estate (excluding discontinued operations) amortization of capitalized interest and distributed income (loss) of equity investees to income (loss) from continuing operations before noncontrolling interests, equity in income (loss) of unconsolidated entities and income taxes. Fixed charges consist of interest costs and capitalized amortization of debt issuance costs.