Net Internal Floor Area Vs Gross Floor Area

Areas are the foundation of a development appraisal and using the wrong area can cause significant changes in the profitability of a scheme.

Net internal floor area vs gross floor area. Gross internal area is the total area of the building measured only to the internal face of the external walls. Understanding commercial lease floor areas gross vs net leasable area. The net internal area nia of a building is the usable area measured to the internal finish of the perimeter or party walls ignoring skirting boards at each floor level. Net internal area covers all of those areas that can be used for a particular purpose.

Floor areas in property development can often cause a fair bit of confusion when do you use gross internal area when does the net apply and what about gross external area. Net internal area nia. Housing authority shows internal floor area in case of prh estates while for tps hos and psps estates it shows saleable and gross floor area. The efficiency saleable floor area is usually 75 85 of gross floor area higher value for the blocks with bigger apartments and for low rise blocks since the common area of a blocks with a given.

22nd mar 2018 reference. It is very important when describing the area of a building to be clear about which measure is being used for example in planning applications building regulation applications property sales lease negotiations rating valuations and so on. Gross internal floor area gifa or gross internal area gia created. 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.

Net internal area nia or usable floor area ufa the nia is the gia less the floor areas taken up by lobbies enclosed machinery rooms on the roof stairs and escalators mechanical and electrical services lifts columns toilet areas other than in domestic. Broadly speaking the whole enclosed area of a building within the external walls taking each floor into account and excluding the thickness of the external walls. Gross internal area gia the floor area contained within the building measured to the internal face of the external walls. In general terms this is the total area enclosed by the external walls of a building measured to the internal face of those walls and taking into account every floor in the building.