Net Floor Area Definition

Gross floor area gfa in real estate is the total floor area inside the building envelope including the external walls and excluding the roof.

Net floor area definition. The floor area within the inside perimeter of the exterior walls of the building under consideration exclusive of vent shafts and courts without deduction for corridors stairways closets the. The total enclosed floor area designed for the exclusive use of an occupant including any basements mezzanines or upper floors. Net leasable area in a building or project floor space that may be rented to tenants. The actual occupied area not including unoccupied accessory areas.

Definitions of gfa including which areas are to be counted towards it and which areas aren t vary around the world. It generally excludes common areas and space devoted to the heating cooling and other equipment of a building. The net floor area nfa of the private units in a residential condo building is typically 60 of the gross floor area gfa. The floor area ratio is the relationship between the total amount of usable floor area that a building has or has been permitted to have and the total area of the lot on which the building stands.

Adding to this confusion is the practice among some developers to use gross leasable area gla and gfa interchangeably or to use. The gross floor area shall not include shafts with no openings or interior courts. Net floor area is the sum of the horizontal areas of the several rooms measured from the interior faces of the walls of each room. Net floor area does not include parking garages basements for storage or utilities common elements and common hallways.

Much of the confusion lies in the area of definitions for gross net lettable usable saleable carpet and other areas. Net floor area shall be the sum of total leaseable area for nonresidential uses. The floor area of a building or portion thereof not provided with surrounding exterior walls shall be the usable area under the horizontal projection of the roof or floor above. For each occupant it is generally measured from the centerline of partitions that separate adjacent occupants from the measure line on the exterior surface of exterior enclosures from the lease line at common areas and includes the full thickness of all other.

For accurate benchmarking purposes nfa must be calculated using a consistent methodology. David faulkner of colliers international is amazed at the number of ways that exist regionally to measure gross floor area gfa which at its most basic level is the total floor area as measured round the building perimeter.