Below are the statistics summary concerning GSA's owned and leased Historic Building inventory as of May 2008.
Size of GSA Historic Buildings (Government-Owned) Inventory 438 historic buildings listed, formally determined eligible, and likely to be determined eligible based on age and other criteria for inclusion in the National Register of Historic Places.
Historic buildings provide approximately one fourth (25%) of GSA's federally owned space
Occupiable: 34 million s.f.
Rentable: 47 million s.f.
Gross: 53 million s.f.
National Register of Historic Place (Government-Owned Inventory):
252 buildings listed in the National Register
64 National Historic Landmarks (highest category of importance in the National Register)
Leases in Historic Buildings:
GSA leases space in approximately 50 historic buildings
Non-federally owned historic buildings provide more than 2.7 million square feet leased by GSA