COPT Defense Properties Quarterly report pursuant to Section 13 or 15(d)

Organization (Details)

Organization (Details) ft² in Thousands	Jun. 30, 2017 a ft² Property MW
Partially operational properties
Investments in real estate
Number of real estate properties	2
Properties under or approved for redevelopment
Investments in real estate
Number of real estate properties	2
Area of real estate property (in square feet or acres) \| ft²	61
Operating office properties
Investments in real estate
Number of real estate properties	165
Area of real estate property (in square feet or acres) \| ft²	17,300
Operating office properties \| Single-tenant data centers
Investments in real estate
Number of real estate properties	14
Office properties under, or contractually committed for, construction or approved for redevelopment
Investments in real estate
Number of real estate properties	10
Area of real estate property (in square feet or acres) \| ft²	1,400
Office properties under, or contractually committed for, construction or approved for redevelopment \| Partially operational properties
Investments in real estate
Number of real estate properties	3
Office properties under, or contractually committed for, construction or approved for redevelopment \| Properties completed Held-for-future lease
Investments in real estate
Number of real estate properties	2
Land controlled for future development
Investments in real estate
Area of real estate property (in square feet or acres) \| a	987
Developable square feet \| ft²	12,500
Other Land
Investments in real estate
Area of real estate property (in square feet or acres) \| a	194
Operating wholesale data centers
Investments in real estate
Critical load (in megawatts) \| MW	19.25
GI-COPT \| Operating office properties \| Single-tenant data centers
Investments in real estate
Number of real estate properties	6