Net Internal Area (NIA) is the useable area within a building measured to the internal face of the perimeter walls at each floor level with certain specified areas excluded.. Gross Internal Area (GIA) is the area of a building measured to the internal face of the perimeter wall at each floor level.

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.

Additionally, what is GIA in property? In architectural, construction, and real estate, floor area, floor space, or floorspace is the area (measured as square feet or square metres) taken up by a building or part of it. Gross internal area (**GIA**) – The floor area contained within the building measured to the internal face of the external walls.

In this manner, how is GIA calculated?

**GIA** is the total area of buildings owned, occupied or maintained by the HEP, measured to the internal face of the perimeter walls at each floor level (i.e. the footprint of the building excluding the width of the outside walls). It includes areas occupied by internal walls and partitions.

What does Gifa mean?

Gross Internal Floor Area

### Does gross internal floor area include garage?

Gross Internal Floor Area is the area of a building measured to the internal face of the perimeter walls at each floor level, which includes: Areas occupied by internal walls and partitions. Columns, piers chimney breasts, stairwells, lift-wells, other internal projections, vertical ducts, and the like.

### How do you calculate the floor area of a building?

Floor area ratio (FAR) is the measurement of a building’s floor area in relation to the size of the lot/parcel that the building is located on. FAR is expressed as a decimal number, and is derived by dividing the total area of the building by the total area of the parcel (building area ÷ lot area).

### Are balconies included in Gia?

Gross internal area excludes: Open balconies. Open fire escapes. Open-sided covered ways.

### How do you measure Gea?

The main definitions used within the code are: Gross External Area (GEA). The area of building measured externally at each floor level. Gross Internal Area (GIA). The area of a building measured to the internal face of the perimeter walls at each floor level. Net Internal Area (NIA).

### How do you calculate gross external floor area?

You need to find the gross external floor area (GEFA) of your house – both upstairs and downstairs. GEFA is defined as the area of a dwelling measured externally at each floor level. The best way is to go outside and measure the length and width of your house and multiply those figures together.

### Does gross area include stairs?

The footprints of stairways, elevator shafts, and vertical duct shafts are to be counted as gross area on each floor through which they pass.

### What is usable area?

usable area. The actual occupiable area of a floor. Usable area can house furniture and personnel. A floor’s usable area is calculated by subtracting the floor’s service areas and vertical penetration areas from its internal gross area.

### What is net Saleable area?

Net Saleable Area (NSA) Usually used for residential property and is very similar to Gross Internal Area (GIA). It includes all floor area including internal walls, mezzanines, hallways, bathrooms but excludes common spaces, patios, balconies. Source.

### What IPMS 3?

IPMS 3 is the basis of measurement for valuation and the marketing of offices which replaced the ‘Net Internal Area’ (NIA) basis of measurement from 1 January 2016. IPMS 3 uses the term ‘useable floor area’ meaning space for the exclusive use of an occupier.

### How do you measure a building?

Look at the room (or outside of the building, if you’re taking exterior measurements) and make a rough outline of the dimensions, so you have a good visual starting point. Measure the longest wall first. Do this by running your tape measure along the baseboard from one corner to the other.

### What is the internal dominant face?

Internal Dominant Face. The inside finish surface comprising 50% or more of the surface area for each vertical section forming an internal perimeter. The Inside finished surface comprising 50% or more of the surface area for each Vertical Section forming an internal perimeter.

### How do you calculate gross area?

Calculate the area of each square or rectangle by multiplying the length by height. Add up the area of each square or rectangle to obtain the total gross area.

### What is the difference between lot area and floor area?

To put it simply, a floor area is the size of the indoors area (inside the building walls) and the lot area is the whole size of the lot, i.e. including the yard up to the boundaries of the lot. Note that the floor area also includes garage, built-in closets etc. so it’s not just the “living area”.