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. … Any built in cupboards or units that occupy usable areas.

What should be included in NIA?

1. Perimeter skirting, moulding, or trunking.
2. Kitchens.
3. Any built in units or cupboards occupying useable areas (subject to height exclusion below)
4. Partition walls or similar dividing elements.
5. Open circulation areas and entrance halls, corridors and atria (but see 9 and 10 below)

What is included in gross internal floor area?

• Areas occupied by internal walls and partitions.
• Columns, piers chimney breasts, stairwells, lift-wells, other internal projections, vertical ducts, and the like.

What is excluded in NIA?

NIA will exclude: lift rooms, boiler rooms, tank rooms, fuel stores and plant rooms other than those of a trade process nature. stairwells, lift wells, those parts of entrance halls, atria, landings and balconies used in common or for the purpose of essential access.

What's the difference between NIA and Gia?

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.

What is wall to floor ratio?

Wall–floor ratio A major factor as external facades typically account for 15 to 25% of construction cost. Ratios of between 0.40 and 0.50 are good but a variation of 0.1 can change overall construction costs by 4 to 5%. … Floor-to-floor height has a marginal impact on overall cost.

How is Nia calculated?

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. … Partition walls and other dividing elements.

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.

Are balconies included in GEA?

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

Does floor area include stairs?

What is included in gross floor area? This consists of the lobbies, area for tenants and common area, mechanical equipment areas, staircase, basement, laundry, storage rooms, restrooms and atriums.

Article first time published on

What percentage of GEA is GIA?

From the areas shown in this example, you can calculate that the GIA is 91% of the GEA and the NIA is 96% of the GIA.

Does GIA include Atrium?

Areas occupied by internal walls and partitions. Columns, piers chimney breasts, stairwells, lift-wells, other internal projections, vertical ducts, and the like. Atria and entrance halls with clear height above, measured at base level only.

Are GIA and Gifa the same?

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.

How is NSA measured?

Nett Saleable Area (NSA) The GFA minus circulation (stairs, corridors & lifts) and services areas. Floor Area Ratio (FAR) Gross Floor Area (GFA) of all buildings within the site divided by the site area.

How do you find gross external 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.

How do you calculate net from 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.

How do I find the internal area of my house?

Measure the length of the house multiply by the width this will give you the square metridge of the area then multiply by 2. Example 7metres x 5metres = Total 35m2 (sq metres) x 2 = 70m2 Then do the same for loft if needed.

What is good floor area ratio?

FAR is a measure of how much square footage can be built on a given piece of land. In commercial areas, FAR should be at least 1.0. … Unfortunately, while an FAR of 1.0-2.0 is considered ideal for creating transportation choices, most towns allow less FAR than this in their town centers.

What is plot coverage in construction?

Plot coverage means the extent to which the plot is covered with a building or structure and this is expressed as percentage or the ratio of the built up area to plot area; Sample 1.

What is wall to floor area?

The wall-to-floor ratio of a building is calculated by dividing the external wall area by the gross. internal floor area. This indicates the proportion of external wall required to enclose a given. floor area.

Is IPMS 3 the same as NIA?

IPMS 3 is a basis of measurement for valuation, market analysis and the marketing of offices (for rental and capital valuation). … It replaces the net internal area (NIA) basis of measurement.

What is included in square footage of a house UK?

This includes unconverted lofts or basements, storage space and any part of a property that has a ceiling height of less than 1.5metres. If you have a room with eaves, the portion that is lower than 1.5metres will be omitted. Measuring a property’s sq ft only accounts for floor space – not volume.

Is a garage included in gross floor area?

The area contained within the external walls of the building measured at each floor level (including any floor below the level of the ground), together with the area of each balcony in the building. The basis for calculating GFA may vary between owner groups and sometimes the GFA excludes the parking garage.

Do you count voids in Gia?

The technical planning guidance states: This includes partitions, structural elements, cupboards, ducts, flights of stairs and voids above stairs. The Gross Internal Area should be measured and denoted in square metres (m2).

Is balcony included in plinth area?

The total area of the building including interior and exterior wall, measured at floor level of the basement or at any story including balconies, is defined as Plinth Area.

What are not included in floor area?

• Stairways and stairwells;
• Elevators, elevator equipment rooms, and elevator shafts;
• Ramps to a subterranean or semi-subterranean parking structure or ramps between floors of a parking structure provided the ramp does not accommodate parking;

Is car porch included in plinth area?

But while calculating the plinth area of a building other than a residential building, the plinth area of a car porch cannot be excluded.

What is external area?

External Areas means all the areas that are not Internal Areas including but not limited to pathways, walkways, steps and similar pedestrian traffic ways, walls, windows, facades, external Floors and similar external surfaces; Sample 1.

What does internal area mean?

Gross internal area (GIA) – The floor area contained within the building measured to the internal face of the external walls.

What does net floor area mean?

Net floor area: Commonly also referred to as “net area”, the net floor area is derived when the construction area, or the outer walls of a building, is deducted from the gross floor area. … Technical area: These are the technical rooms, air shafts, and server rooms of a building.

Is balcony part of floor area?

Floor Area of Building refers to the sum of the area of each floor of the building measured to the outer surface of the outer walls including the area of lobbies, cellars, elevator shafts and all communal spaces in multi-dwellings. Areas of balconies are excluded.