By S&S Co. Advocates & Solicitors · Published 9 June 2026 · Informational content, not legal advice. See our disclaimer
Carpet Area, Defined
Before RERA, developers commonly sold units on a 'super built-up area' basis that bundled in a proportionate share of common areas, staircases and external walls: a figure that made comparison across projects difficult and left buyers with limited insight into how much usable space they were actually paying for. RERA's definition of 'carpet area' under Section 2(k) fixed this by requiring sale on the basis of the net usable floor area within an apartment, excluding the area covered by external walls, areas under services shafts, and balconies or verandahs, but including internal partition walls.
What to Check at Booking
The carpet area figure disclosed at booking and reflected in the registered agreement for sale is the figure a developer is bound to deliver, subject only to a tolerance the agreement expressly permits. A buyer should confirm the agreement states the carpet area in the RERA-defined sense (not built-up or super built-up area relabelled), and should check whether any tolerance clause exists at all: if none does, the developer is bound to the disclosed figure without qualification.
What to Do at Possession
At possession, a buyer is entitled to have the actual carpet area verified (either independently or through the project's own architect certification) against the figure in the agreement. If there is a shortfall, RERA requires the developer to refund the proportionate amount with interest; if there is an excess beyond any agreed tolerance, the developer cannot charge extra for it without the buyer's consent. Disputes commonly arise over the correct rate to apply to a shortfall refund: the appropriate benchmark is the original per-square-foot rate the buyer actually paid, not the developer's current market rate for the project.
Common Points of Friction
A recurring dispute is a developer arguing an unstated 'industry standard' tolerance margin should excuse a shortfall even where the agreement itself contains no such clause: RERA authorities and tribunals have generally rejected that argument absent an express term. Buyers should also be alert to agreements that describe area in ambiguous terms, since a dispute over what was actually promised is harder to resolve than a dispute over whether a clearly promised figure was delivered.
Frequently Asked Questions
What is the difference between carpet area, built-up area and super built-up area?
Carpet area is the net usable floor area within the apartment; built-up area adds the area under walls; super built-up area further adds a proportionate share of common areas like lobbies and staircases. RERA requires sale on a carpet area basis.
Can a developer charge extra if the actual carpet area is more than what was disclosed?
Not without the buyer's consent: any excess area beyond an agreed tolerance generally cannot be unilaterally charged for by the developer.
What rate applies if I'm owed a refund for a carpet area shortfall?
The refund is generally computed at the same per-square-foot rate the buyer originally paid, not the developer's current market rate for the project.
References & Further Reading
This article references the following statutes, rules and judicial decisions. Case citations link to the fuller discussion in our Legal Updates archive, verified against primary sources at the time of writing.
- Real Estate (Regulation and Development) Act, 2016: Section 2(k) (definition of carpet area) and Section 14 (adherence to sanctioned plans and disclosed specifications).