Carpet area vs builtup area: Why is it important to know the difference

If you are planning to buy an apartment or have ever bought a flat or even browsed through property listings, you must have come across two terms: carpet area and super built-up area.


Developers use these terms interchangeably, but understanding the difference and the legalities can save your investment and avoid legal disputes later on. The gap between them can be surprisingly large and sometimes can translate into lakhs of rupees.
The carpet area is exactly what the name suggests. It is the actual usable floor space inside your home where you can lay a carpet. This includes bedrooms, living room, kitchen, bathrooms, and internal corridors. It does not include the thickness of walls, balconies, or any common spaces in the building, or the living space excluding any outdoor attachment.


Whereas, a super built-up area, on the other hand, is much broader and more developer-friendly. It is the total area of the property, including your carpet area, the thickness of walls, your balcony, and a proportionate share of all common areas in the building: lobbies, staircases, lifts, corridors, clubhouse, gymnasium, and sometimes even the security cabin. Before the RERA was introduced, developers used this inflated figure to quote prices, which meant sometimes buyers were paying for space they would never personally use.


Under Section 2(k) of the Act, carpet area has been given a precise legal definition. It is defined as "the net usable floor area of an apartment, excluding the area covered by the external walls, areas under services shafts, exclusive balcony or verandah area, and exclusive open terrace area, but includes the area covered by the internal partition walls of the apartment."
More importantly, RERA mandates that all registered developers must quote prices based on carpet area and not built-up or super built-up area.


In simple words it excludes common areas, external walls, balconies, verandahs, and terraces, service areas and places that are used for plumbing, wiring, and other utilities. It includes living room, bedrooms, kitchen, bathrooms and toilets, utility rooms etc.

Regardless of what a developer puts in a brochure, home buyers should always insist on stating the carpet area on the registered sale agreement. RERA has brought transparency to a market that was in favour of developers. By linking transactions to the carpet area, the law ensures that buyers know exactly what they are paying for.
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