Yes, and this is one of the cleaner claims a homebuyer can bring, because it is arithmetic rather than argument. Your agreement states a carpet area and a rate. The flat has less. The difference multiplied by the rate is the refund, and interest and compensation sit on top. What you need before you write to anyone is an independent measurement, the sanctioned plan, and the clause in your agreement that deals with variation in area.
How do I prove the flat is smaller?
You prove it with a measurement done to the Section 2(k) definition, not with a tape and a feeling. Engage a licensed architect or surveyor, have them measure the net usable floor area including internal partition walls and excluding external walls, shafts, balconies and terraces, and have them sign a report with a plan. Then place that report next to two documents. The first is the schedule to your agreement for sale, which states the carpet area you bought. The second is the sanctioned plan, which Section 19(1) entitles you to obtain from the promoter and which Section 14(1) obliges him to build to.
Two traps catch buyers here. The first is comparing carpet area with super built-up area. Older brochures sold on super built-up figures that loaded common areas onto your number, and a flat that is 1,150 square feet carpet may well have been marketed as 1,500 square feet. That is not a shortfall. The Karnataka rules require a promoter of an ongoing project to disclose the size of the apartment on carpet area even if it was earlier sold on super area or built-up area, so read which figure your agreement actually uses. The second trap is balconies. They are excluded from carpet area under Section 2(k), so a builder who counted the balcony inside the carpet figure in the agreement has overstated it, and that is your point, not his.
What does the law actually give me?
Three provisions of RERA and one clause of the standard agreement do the work. Section 14(2)(i) provides that once the sanctioned plans and specifications of your apartment have been disclosed to you, the promoter shall not make any additions or alterations in them without your previous consent, and the Explanation to the proviso says minor alterations exclude any structural change including a change to the area. Section 18(3) provides that a promoter who fails to discharge any other obligation under the Act, the rules or the agreement for sale is liable to pay compensation to the allottee. Section 12 adds a separate claim where you paid an advance relying on an incorrect statement in the advertisement, prospectus or model flat. Section 61 exposes the promoter to a penalty of up to five per cent of the estimated project cost for contravening the Act.
The model agreement for sale prescribed under the central Agreement for Sale Rules, 2016, which the state rules adopt, contains a clause requiring the promoter to confirm the final carpet area after the occupancy certificate is granted, to recalculate the price, and where there is a reduction to refund the excess money within forty-five days with annual interest at the rate prescribed in the rules from the date the excess was paid. The same clause caps any increase the promoter can charge you for at three per cent of the carpet area. Find the equivalent clause in your own agreement, because a builder who drafted around the model will still be held to Section 14 and Section 18(3).
K-RERA or the consumer commission?
Both are open. Section 88 of RERA says the Act is in addition to and not in derogation of any other law, and Section 100 of the Consumer Protection Act, 2019 says the same in reverse. The Supreme Court in Imperia Structures Ltd v Anil Patni (2 November 2020) held that the remedy under the consumer law is an additional remedy and that this position did not change with the enactment of RERA. What you cannot do is claim the same refund in both places at once, so pick one.
| Forum | Provision | What it gives | When it fits |
|---|---|---|---|
| K-RERA, complaint under Section 31 | Section 14, Section 18(3), Section 61 | Direction to refund the excess with prescribed interest, penalty on the promoter | Project is registered, the shortfall is clear on measurement |
| Adjudicating officer under Section 71 of RERA | Compensation under Sections 12, 14, 18 and 19, factors in Section 72 | Compensation beyond the refund, to be decided within sixty days of the application | You have loss to prove beyond the price difference |
| District or State Consumer Commission | Section 2(11) deficiency, Section 2(47)(i)(a) false representation of quantity, Section 39 | Refund with interest, compensation including for mental agony, costs | You want one forum for area, delay and defects together, or the project was never registered |
The consumer forum is fixed by the value of the consideration you paid for the flat under Section 34(1), not by the size of the shortfall, so a Rs 96 lakh flat with a Rs 4.8 lakh shortfall is still a State Commission matter on the current pecuniary bands. The builder as service provider answer explains why the commercial purpose objection, not the builder's status, is where these complaints get tested.
How long do I have?
Under Section 69(1) of the Consumer Protection Act, two years from the date the cause of action arose. For a carpet-area shortfall that is ordinarily the date you discovered it, which is the handover or the measurement, and you should write to the builder within days of the report so that the date is on the record. The RERA provisions I have read do not state a limitation period for a Section 31 complaint, but do not treat that as licence to wait, because a possession letter signed without protest and years of silence read badly before any forum. If the builder's handover papers contain a no-claim declaration, sign with the words accepted without prejudice to the claim for carpet-area shortfall, and email the same day. Our note on builder delay and homebuyer remedies covers the interest rate mechanics and how K-RERA orders are enforced.
- The registered agreement for sale with the schedule stating carpet area and the rate per square foot
- The measurement report by a licensed architect or surveyor, with the plan and the Section 2(k) exclusions marked
- The sanctioned plan for your floor, obtained from the promoter under Section 19(1) or from the sanctioning authority
- Every payment receipt, to fix the date from which interest runs on the excess
- The brochure or advertisement if it stated an area, for the Section 12 claim
- Your written demand to the promoter and his reply, which fixes the cause of action date
What I tell buyers is to measure before they take the keys, or on the first day they have them. A measurement done a year later invites the answer that you altered the flat, and a claim raised after you have lived in it for two years invites the limitation objection. The report costs a fraction of what one square foot in Bengaluru costs, and it settles the case before it starts.