Getting Less Carpet Area Than Promised

If you have been promised a certain carpet area in your society's redevelopment and worry the new flat may turn out smaller, the safest position is simple: only the RERA carpet-area figure written into your registered agreement is binding, and Section 14 of RERA puts narrow, written limits on when a developer may depart from the sanctioned plans at all. Most carpet shortfalls are not sudden thefts of space — they grow quietly out of vague wording, confusion between carpet area and larger "saleable" numbers, and members signing before the promised area is fixed on paper.

This page is written to be used, not only read. It gives you the two different definitions of "carpet area" that operate side by side in a Mumbai redevelopment and why they are not interchangeable, a measurement method you can hand to a surveyor in writing, who is qualified to certify it, the arithmetic that turns a shortfall into a rupee figure, a table of forums with the exact provision and the deadline to diarise for each, and what your committee must minute, and when.

What "carpet area" actually means under RERA

Under the Real Estate (Regulation and Development) Act, 2016 — usually called RERA, the law that regulates builders and flat sales in Maharashtra through MahaRERA — carpet area is the net usable floor space inside your flat: the area you could actually spread a carpet over. It is measured wall to wall within the flat and includes the thickness of the internal partition walls between your own rooms, but it excludes the external walls, the areas under service shafts, and any exclusive balcony, verandah or open-terrace space. Since RERA came into force, a flat must be described and sold on this carpet figure — not on the older, larger numbers builders once used.

Those older numbers still cause most of the confusion. Built-up area adds wall thickness and balconies on top of carpet. Super built-up or saleable area goes further, adding your flat's share of common spaces such as the lift, lobby, staircase and society office. The percentage a developer adds on top of carpet to reach these bigger figures is called the loading factor. A flat with 500 sq ft carpet and 30% loading might be marketed as 650 sq ft "saleable" — the very same home, a bigger-sounding number. In redevelopment, trouble starts when a member remembers the larger figure and receives the smaller, correct carpet figure, or when the offer never made clear which figure it was quoting in the first place. If any of these terms feel slippery, the plain-English FAQ & glossary sets each one out with an example.

The two different "carpet areas" in a Mumbai redevelopment

This is the most useful thing on this page, and almost no member is ever told it. In a Greater Mumbai redevelopment two different definitions of "carpet area" operate at the same time, and they measure the same flat differently. Neither is wrong. They do different jobs. The loss happens when a number worked out under one definition is written into a document governed by the other.

Source: Real Estate (Regulation and Development) Act, 2016, s.2(k). DCPR 2034 Regulation 2(22): "Carpet area" would have the same meaning as defined in Real Estate (Regulation and Development) Act, 2016. The scheme definition is repeated in Regulation 33(5) and Regulation 33(7) of the sanctioned DCPR 2034: "net usable floor area within a tenement excluding that covered by the walls or any other areas specifically exempted from floor space index computation as per then prevailing Regulation but including the areas of balcony if allowed free of FSI as per then Regulation."

What to do about it, in one line. Make the PAAA state both figures separately, and say which is which: "existing carpet area as certified for the purposes of Regulation 33(7): X sq m" and "carpet area of the new flat as defined in Section 2(k) of the Real Estate (Regulation and Development) Act, 2016: Y sq m". Once both are on the face of the registered document, nobody can swap one for the other later. The same trap works in reverse when you measure: a surveyor who uses the old building-measurement convention and deducts your internal partitions will report a figure below your RERA carpet and make you think there is a shortfall where there is none — so the instruction to the surveyor must name Section 2(k) expressly.

Common ways a carpet-area shortfall creeps in

Very few shortfalls are dramatic. More often the space leaks away quietly between the first spoken promise and the final registered agreement. These are the patterns members most often report:

• Vague wording. The offer or memorandum of understanding says "area" or "flat size" without the word "carpet", leaving room to later argue it meant a larger figure.
• Carpet quoted against a larger base. A generous-sounding number turns out to be built-up, super built-up or saleable area, and the true carpet is much smaller once loading is stripped out.
• A loading factor that shifts. The loading percentage is left undisclosed, or it grows between the offer and the agreement, shrinking the carpet you actually receive.
• Offer and agreement disagree. The glossy offer letter shows one figure; the registered agreement quietly records a smaller one. The registered document is what binds — so the smaller figure wins.
• Plans without dimensions. The floor plan attached to the agreement carries no measurements, or the room sizes do not add up to the promised total.
• A "tolerance" clause. A clause lets the developer vary the area by a margin — say a few per cent — with no compensation, so a shortfall becomes "permitted".
• Balconies and shafts counted in. Balconies, dry balconies, flower beds, ducts or shaft areas are folded in to make the carpet look bigger than the usable floor really is.
• Verbal extras never written down. A promise of extra "incentive" area or a free enclosed balcony is made in a meeting but never enters the registered agreement.
• Show flat larger than reality. A sample or model flat is built roomier than the units members will actually be given.
• The delivered flat simply measures less. On a joint measurement after construction, the built flat is smaller than the agreement promised.

Warning signs and how to protect your society

Each warning sign has a straightforward protective step. Agree these as a society before signing anything, so no single member is left to argue about space alone.

How to protect every member — practical steps

1. Fix the number in writing, everywhere. The offer, the memorandum of understanding, the Development Agreement (the master contract between the society and the developer, often shortened to DA) and each member's Permanent Alternate Accommodation Agreement (the PAAA — the individual flat agreement that records exactly what each member will receive) must all state the same RERA carpet area, in square feet and square metres, in both figures and words.
2. Register the agreements. Under Section 17 of the Registration Act, 1908, the DA and PAAA must be compulsorily registered, and the Government's directive under Section 79A of the Maharashtra Co-operative Societies Act, 1960 (dated 4 July 2019) also requires DA and PAAA registration. A registered document carrying your carpet figure is your strongest proof. If your society has not yet begun, registering your society for guided support helps you get this right from day one.
3. Attach a dimensioned plan. Insist a signed floor plan with room measurements is annexed to the PAAA, so "500 sq ft carpet" is backed by dimensions that genuinely add up.
4. Check the developer's MahaRERA page. The project must be registered under Section 3 of RERA, and the carpet area the developer declares to MahaRERA should match the figure in your agreement.
5. Deal with tolerance clauses. Remove or tightly cap any clause that lets the area vary, and require compensation for any reduction rather than accepting it as "permitted".
6. Measure it properly, and on notice. Appoint your own architect or licensed surveyor by committee resolution, give the developer at least seven clear days' written notice to attend a joint measurement, and measure strictly to the Section 2(k) definition. Take an early reading on the bare RCC slab if you can get in — that is a warning signal, not your claim — and take the reading that counts on the finished flat as handed over, because that is the floor you actually receive. Keep a continuous video. The full method and the certificate wording are set out below.
7. Run the numbers independently. Use the Additional Area Calculator to check the extra carpet a project can genuinely offer, and the Offer Comparison tool to line up competing bids on a true carpet basis.
8. Get expert eyes on the draft. An independent tender and agreement review can catch loose "area" wording, missing dimensions and one-sided tolerance clauses before anyone signs — the same traps set out in our guide to common agreement mistakes.

How to measure the flat — the method, and who must certify it

A measurement only helps if it was taken the right way, by the right person, with the developer on notice. Give your surveyor this method in writing, so that the brief itself is on record.

The method, step by step

1. Start from the sanctioned plan, not the brochure. Obtain the approved floor plan for your own flat number and mark on it every wall you will measure.
2. Measure to the inside face of the external walls. The thickness of the external wall is outside your carpet area.
3. Do not deduct the internal partition walls. Under RERA s.2(k) they are inside your carpet area. This one instruction is where most understated measurements go wrong, and it is the single most valuable line in the brief.
4. Deduct only three things — the area under any service shaft or duct passing through the flat, the exclusive balcony or verandah, and the exclusive open terrace. Nothing else comes out.
5. Add nothing. No lobby, no staircase, no share of common area, no loading of any kind.
6. Record room by room. Every length and breadth to the nearest 10 mm, the measured thickness of every partition, and a diagonal for any room that is not a true rectangle. Total the clear room areas, then add back the measured plan area of the partitions, and state the result in sq m to two decimals and in sq ft.
7. Two readings, two purposes. A reading on the bare RCC slab before plaster and tiling warns you early that the structure does not match the plan. The reading that decides your claim is the flat as handed over, finished — that is the floor you receive. Record the plaster and tile thickness at the same visit, so the developer cannot later blame the difference on finishes.
8. Film it. Continuous video with the tape and the room in the same frame, and the flat number visible at the start of each flat.
9. Both sides sign every page of the measurement sheet. If the developer's representative refuses, record the refusal on the sheet with the person's name and the time.

Who should certify it

• An architect registered with the Council of Architecture under the Architects Act, 1972, whose registration number appears on the certificate; or
• a Licensed Surveyor or Engineer licensed by the Municipal Commissioner. DCPR 2034 Regulation 2(79) defines "Licensed Surveyor / Engineer / Structural Engineer / Supervisor" as a qualified professional of that description "licensed by the Commissioner". The licence number goes on the certificate.
• Not the project's own architect on record. The professional who signs the developer's plans cannot also be the society's independent check. The society appoints, instructs and pays its own, by committee resolution, and keeps the engagement letter and the fee bill in its books.

The certificate must be on the professional's letterhead and should state: the flat number; the date and time of measurement; the definition applied, with Section 2(k) quoted in full; the instrument used; the room-wise dimensions; every deduction made and the reason for it; the total in sq m and in sq ft; who was present; and the signature with the registration or licence number. A certificate giving only a total is worth very little. One that shows every dimension is very hard to argue with.

Putting a rupee figure on the shortfall

"We got less" is a complaint. "We got 40 sq ft less, worth Rs 9,60,000 a flat at the developer's own rate" is a claim. Do the arithmetic before you write to anybody.

Which rate to use — in this order

1. The extra-area rate in your own agreement. Most PAAAs and Development Agreements carry a clause letting a member buy additional carpet at a stated rate per sq ft. That is the developer's own price for one square foot of carpet in that very building, in a document they signed. It is the hardest rate for them to dispute.
2. The rate at which the developer sold free-sale flats in the same building. Obtain certified copies of two or three registered sale agreements from the Sub-Registrar of Assurances where they were registered. Each shows the consideration and the carpet area, so the rate per sq ft is on the face of the document.
3. The Annual Statement of Rates (the ready reckoner) for your locality, published by the Department of Registration and Stamps. This is the conservative floor and it is publicly verifiable, so it is what you use when the first two are out of reach.

Your own numbers, in three lines. Shortfall in sq ft = agreement carpet − certified measured carpet. Rupee value = shortfall × your rate per sq ft. Compensable amount = (shortfall − tolerance percentage × agreement carpet) × rate. Put all three lines in the demand letter and in the committee minutes, with the source of the rate named.

Redevelopment has one feature an ordinary flat purchase does not, and it changes what you should ask for. A buyer who paid a price per square foot claims a refund of the price of the missing area. A redevelopment member paid no price — the consideration was the old flat surrendered — so there is nothing to refund. The claim is therefore for compensation quantified at a rate, or, very often more achievable, for the developer to make good in kind by allotting the missing carpet out of the free-sale component. Ask for both, in the alternative, in the same letter.

If the area is reduced or you receive less than promised

RERA gives members real protection here, but it is narrower and sharper than the usual summary suggests, and knowing the exact shape of it is what wins the argument. Under Section 14(1) the developer must develop the project in accordance with the sanctioned plans, layout plans and specifications approved by the competent authority. Under Section 14(2)(i) no alteration or addition may be made to the sanctioned plans and specifications of your own flat without your previous consent — subject to a proviso allowing minor alterations you have consented to, and minor changes necessary for architectural or structural reasons that are duly recommended and verified by an authorised architect or engineer, after proper declaration and intimation to you. Under Section 14(2)(ii), any other alteration to the buildings or the common areas needs the previous written consent of at least two-thirds of the allottees other than the promoter.

The proviso is where the case is actually fought, so prepare for it. A developer facing a shortfall claim will very often say the change was minor and structurally necessary. That defence has three moving parts and it fails if any one of them is missing. Demand all three in writing, by name and date: the written recommendation of the authorised architect or engineer; that professional's verification; and the declaration and intimation given to you before the change was made. If the developer cannot produce an intimation that reached you before the work was done, the proviso does not protect them, and you are back on Section 14(1) and Section 14(2)(i).

Section 14(3) then gives you a clock, and it is the clock most societies miss. Any structural defect, defect in workmanship or quality, or failure in any other obligation of the promoter under the agreement for sale, brought to the promoter's notice within five years of possession, must be rectified within thirty days, free of charge. A carpet area smaller than the registered agreement promised is a failure of an obligation under that agreement. So the first formal move after a certified measurement is a written notice to the promoter under Section 14(3), sent by registered post with acknowledgment due — it starts the thirty-day clock and it dates your claim.

Where to go, what to file, and by when

Three procedural points that decide these matters.

• Authority or Adjudicating Officer — choose the right one. Directions to comply, and orders for interest and refund, come from the Authority on a Section 31 complaint. Compensation under Sections 12, 14, 18 and 19 is adjudged by the Adjudicating Officer under Section 71. A claim for the rupee value of missing carpet, filed only before the Authority, can be sent to the right door months later.
• Run one forum for one relief. Section 79 of RERA bars civil courts from entertaining these matters. Where a consumer complaint is already pending, the proviso to Section 71(1) allows the allottee, with the permission of the consumer forum, to withdraw it and apply instead to the Adjudicating Officer. Running two forums for the same relief invites both to decline.
• A promoter's appeal is expensive, and that matters to you. Under the proviso to Section 43(5), a promoter appealing to the Appellate Tribunal cannot have the appeal entertained without first depositing at least thirty per cent of the penalty, or the total amount payable to the allottee including interest and compensation. Knowing that changes the settlement conversation the day after you win.

Do not let time run out. RERA does not prescribe a limitation period for a Section 31 complaint. That is not a licence to wait. Article 113 of the Limitation Act, 1963 gives three years from the date the right to sue accrues as the residuary period, so the sensible working rule is to file well inside three years of taking possession. In the consumer commission the two-year limit in Section 69(1) is express, and condonation under Section 69(2) needs sufficient cause recorded in writing — not something to plan around.

Where a developer set out from the very beginning to promise space it never intended to deliver, that can amount to cheating under Section 318 of the Bharatiya Nyaya Sanhita, 2023 (the law that replaced the older Indian Penal Code); where money or property handed over in trust is later misused, Section 316 covers criminal breach of trust. These are serious criminal provisions that turn on proof of dishonest intent, so they are a last resort rather than a first step — but members should know the protection exists.

The documents to obtain, and exactly where each one comes from

If you have to use RTI, know the clock. The Public Information Officer must reply within thirty days under Section 7(1) of the Right to Information Act, 2005. Where the record concerns a third party — and a developer's sanctioned plan usually does — the Section 11 third-party procedure applies and the reply may take up to forty days. If nothing comes, a first appeal lies to the First Appellate Authority within thirty days under Section 19(1), and a second appeal to the State Information Commission within ninety days under Section 19(3). Diarise all four dates on the day you file.

Never sign an unqualified possession receipt while a measurement is pending. If possession must be taken, write on the receipt and on your retained copy: "Possession taken without prejudice to the member's and the society's claim in respect of carpet area; joint measurement pending." Hand over the endorsed copy and keep the acknowledgment. An unqualified receipt is the first document a developer will produce to say you accepted the flat as built.

What the society must minute, and when

A claim brought by the society is far stronger than forty members complaining separately — but only if the paperwork behind it exists and is properly dated. Work to this sequence, and minute every step.

Two practical warnings. First, a resolution passed after the complaint is filed is worth far less than one passed before it — the authority to proceed should predate the filing, and the date in the minute book should show that. Second, keep the measuring professional's engagement letter, bill and payment in the society's own books: a certificate from someone the developer paid is not an independent certificate, and it will be attacked on exactly that ground.