COPT Defense Properties Annual report pursuant to Section 13 and 15(d)

Organization (Details)

Organization (Details) - Dec. 31, 2019 ft² in Millions	ft²	property	MW	a
Operating properties
Investments in real estate
Number of real estate properties		170
Area of real estate property (in sqft or acres) \| ft²	19.2
Operating properties \| Office Properties
Investments in real estate
Number of real estate properties		148
Area of real estate property (in sqft or acres) \| ft²	15.4
Operating properties \| Single-tenant data centers
Investments in real estate
Number of real estate properties		22
Area of real estate property (in sqft or acres) \| ft²	3.7
Operating Wholesale Data Center
Investments in real estate
Critical load (in megawatts) \| MW			19.25
Properties under development or redevelopment
Investments in real estate
Number of real estate properties		14
Area of real estate property (in sqft or acres) \| ft²	2.5
Properties under development or redevelopment \| Office Properties
Investments in real estate
Number of real estate properties		10
Properties under development or redevelopment \| Single-tenant data centers
Investments in real estate
Number of real estate properties		4
Properties under development or redevelopment \| Partially operational properties
Investments in real estate
Number of real estate properties		1
Land controlled for future development
Investments in real estate
Area of real estate property (in sqft or acres)	11.3			900
Other land
Investments in real estate
Area of real estate property (in sqft or acres) \| a				43
Unconsolidated Real Estate Joint Ventures
Investments in real estate
Number of real estate properties		15
Unconsolidated Real Estate Joint Ventures \| Operating properties \| Single-tenant data centers
Investments in real estate
Number of real estate properties		15