Definitions for "Gross floor area"
the sum of the area of all of a building's floors existing within its exterior walls. A municipal zoning ordinance may define gross floor area as extending to the outer surface of the exterior walls; in commercial leasing, however, gross floor area is measured to the inside finish of these walls.
A total of all the floor area above grade measured from the outside walls.
The area within the perimeter of the outside walls of a building taking into account the number of stories contained in the structure. Space used for interior features, such as stairwells and elevator shafts, is included in the gross floor area.