Net Floor Area

A term used in building codes to describe the actual occupied area of a floor, not including accessory unoccupied areas (stairs, elevator & HVAC shafts, mechanical rooms, etc.) or the thickness of walls. (International Building Code)

Applicable Standards:

GENERAL / GENERIC TERM

A term used in the International Organization for Standardization (ISO) standard to express the Interior Gross Area less the areas of all interior walls.