what is the carpet area, built-up area, super built-up area, f.S.I and Setback

carpet area

The carpet area of a building is the functional area or livable area. It is the floor area, excluding the entrance hall, verandah, passages, kitchen, etc.

The area is the space in your home, which can be used for laying a carpet. Includes the thickness of the internal wall.

Technically, the distance between the inner walls is the carpet area.

As per RERA, the net usable floor area of an apartment excludes the area covered by the external walls, the area under services shafts, the balcony or verandah and any open terrace area. But includes the area covered by the internal partition walls of the apartment.

carpet area calculation

= Net usable area of the apartment – Inner wall area

Net usable area means bedroom, kitchen, toilet, etc.

In most cases, the carpet area in your flat would typically be 70% of its buildup area. So, if the buildup area of a property is 2500 sqft. its carpet area would typically be 1750 sqft.

built-up area

The built-up area in your flat or apartment is the carpet area plus the area that is covered by the inner walls and the balcony. In housing apartments in India, nearly 30% of a housing unit’s entire area is used in creating the inner wall and the balconies. This means if the developers tell you that the built-up area of the unit is 2000 sqft, you could assume that the net usable area or carpet area o the apartment will not exceed 1400 sqft.

built-up area calculation

Built-up area = Carpet area + wall area + excludes balcony and corridors

super built-up area

A housing society consists of various common areas, such as the corridor, lift lobby, elevator, etc, And the buyer has to pay a monthly maintenance charge for the upkeep of these areas. The maintenance is a proportional part of these spaces at the time of the purchase.

Before RERA made it mandatory for builders to sell flats based on the carpet area, the widely used super built-up area at the space measuring unit, to cash in on the less or clarity on space calculation.

super built-up area calculation

Super built-up area = Built-up area + Proportionate common area

or

Super built-up area = Carpet area ( 1+loading factor )

Super built-up area includes

• Built-up area of the flat
• Clubhouse
• Lift and Staircase
• Lobby
• Swimming pool
• Gymnasium

Any other common facilities for the resident

loading factor

It is the difference between the super built-up area and the carpet area of your flat. It is used to add constructed spaces, not exclusively allocated to you. It includes shared areas like lifts, lobbies, staircases, and amenities, as well as a part of your terrace and balcony.

The loading factor of 1.20 means that your builder has added 20% to your carpet area. If the residential project does not have many amenities, the loading factor will be small. In most cases, a loading factor of 1.30 is considered sufficient.

floor area

The floor area of a building is the total area of the floor in-between walls. It consists of areas of rooms, verandah, staircase, entrance hall, stores, toilets, sit-out, etc,

Floor Area = Total area of the floor between the walls = Plinth area – Area occupied by walls.

The area occupied by the walls maybe 10% to 15% of the plinth area.

plinth area

The plinth area is the built-up area covered area of a building, measured at the floor level of any storey. It is calculated by measuring the external dimensions of the building at the floor level. Open areas, balconies, etc, Projections are not included in the plinth area.

check the article for more Components of a building

floor space index (F.S.I)

The ratio of the total floor area of a building (Built-up area) to the total plot area. In some cities, F.S.I is known as floor area ratio F.A.R

F.S.I calculation

F.S.I = ( Floor space covered in all floors ) / (Area of the plot)

setback

The setback is essential for the building. Provide a minimum distance at which a building or other structure must be set back from a road, street or any other place which is deemed to need protection. The setback is very helpful for the land owner in future. The local government set the minimum setback distance for every type of building. Normal house average setback distance is 3m to 5m for the side setback, above 5m for the front setback.

the setback is also calculated by the height of the building band area of the building. Local governments create setbacks through ordinances and BUILDING CODES.

usually for reasons of public policy such as safety, privacy, and environmental protection. Setbacks prevent landowners from crowding the property of others, allow for the safe placement of pipelines, and help to preserve wetlands.

Setbacks may also allow for public utilities to access the buildings, and for access to utility meters. They help to pave the way for services, fire tender movement, vehicular or pedestrian movement etc.

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