Builder Changed Layout, Amenities or Carpet Area After Booking? Action Plan

Reviewed on: 2026-06-12.

Rohit booked a 1,050 sq ft carpet area flat in a two-tower project in Thane in 2023. In 2025 the builder circulated a “revised plan”. A third tower now stands on the landscaped garden, the children's play area has moved next to the substation, and his own flat has shrunk to 988 sq ft because a utility shaft ate into the bedroom. The sales office calls it a “minor modification”. The law calls it something else.

Section 14 of the Real Estate (Regulation and Development) Act, 2016 is the spine of this dispute. A promoter must build the project as per the sanctioned plans disclosed at booking. He cannot change your flat without your written consent. He cannot change the layout or common areas of the project without the previous written consent of at least two-thirds of the allottees. A circular announcing the change is not consent. Silence is not consent.

The section splits changes into three buckets. Knowing which bucket your change falls in decides your argument.

• Changes inside your flat or building plan. These need your individual written consent. The only exception is a minor alteration forced by architectural or structural reasons, certified by an authorised architect or engineer, with a declaration and intimation to you.
• Changes to the project layout or common areas. Removing an amenity, adding a tower, shifting open space or parking. These need previous written consent of at least two-thirds of all allottees, not counting flats the promoter still holds.
• No change at all. The promoter cannot rely on a blanket clause in the agreement saying he may alter plans at his discretion. RERA overrides such clauses, and authorities have repeatedly refused to enforce them.

So the first question is never “is the change reasonable”. It is “where is the consent”. Ask the builder, in writing, for the two-thirds consent and the revised sanction. If he cannot produce both, the change is contestable.

Carpet area has a precise definition under Section 2(k) of RERA: the net usable floor area inside your walls. Builders must sell on carpet area, not super built-up. The model agreement for sale in most states, including Maharashtra, tolerates a variation of up to 3 per cent. Beyond that, you are entitled to a proportionate refund.

Take Rohit's numbers. Agreement rate Rs 6,800 per sq ft of carpet area. Promised 1,050 sq ft, delivered 988 sq ft. The shortfall is 62 sq ft, which is 5.9 per cent, well past the 3 per cent tolerance. The refund claim is 62 x 6,800 = Rs 4,21,600, plus interest at the rate prescribed in your state rules, usually SBI's highest MCLR plus 2 per cent. Under the Maharashtra model agreement the refund is due within 45 days of the final carpet area being confirmed. Put this exact calculation in your complaint. Authorities respond well to a number they can order.

Get the delivered area measured by an independent architect before relying on the builder's figure. A signed measured floor plan anchors the whole claim.

Your case is the gap between two sets of documents.

• What was promised: brochure, booking form, allotment letter, agreement for sale, and the plans uploaded on the state RERA portal at registration.
• What is being delivered: the revised plan circular, the builder's emails or WhatsApp messages, possession-stage photographs, and the architect's measurement.

Download the project page from your state RERA portal today. Every registered project carries its sanctioned plans, amenity list and unit details on public record, and any amendment shows there with its date. A change on the ground that never appears as an approved amendment on the portal is strong evidence by itself.

Send one written objection to the builder first, by email and registered post, giving 15 days. If nothing moves, file online.

• On MahaRERA, register on the complaint portal, file Form A against the project's registration number, and pay the Rs 5,000 fee. Claims for compensation go to the Adjudicating Officer in Form B.
• On UP RERA (up-rera.in), the online complaint fee is Rs 1,000 per complaint. Attach the comparison file as a single PDF.
• Other states follow the same pattern through their own portals. Find yours through the project page you downloaded.

Ask for specific relief: a direction to build as per the registered plan, refund of Rs X for the carpet shortfall with interest, and compensation for any amenity removed without two-thirds consent. If the changes are so fundamental that you no longer want the flat, Section 18 lets you exit with a full refund plus interest. That route is covered in our guide on a builder refusing a cancellation refund.

Do not sign a clean possession letter while the dispute is open. Take possession, if you must, expressly under protest with a covering letter.

The builder is a private party, so RTI does not reach him. The municipal corporation or development authority that sanctioned the plan is a public authority, and its file often settles the dispute. File through your state portal or offline, see how to file RTI online. Ask for:

1. Certified copy of the latest sanctioned building plan and layout plan
   for [Project Name], Survey No. [X], [address], as approved by your
   office, along with the date of sanction.
2. Certified copies of all revised sanctions or amendments approved for
   the said project after [date of your booking].
3. Copy of the allottee consent, if any, submitted by the promoter in
   support of any revised sanction.

The PIO has 30 days to reply. If the reply is blocked or vague, use the first appeal route.

• Comparing super built-up figures with carpet area figures. Always convert to carpet area before claiming a shortfall.
• Treating the builder's “revised plan” circular as final. It is an admission, not an authorisation.
• Accepting a credit note or upgrade voucher instead of the refund the model agreement entitles you to.
• Filing in both RERA and the consumer commission for the same relief. Pick one main forum.

If the missing amenity is specifically the clubhouse, see the dedicated guide on a clubhouse promised but never completed. If the builder has also rewritten your instalment plan, read builder changes payment schedule after booking. Parking shifted too? See car parking location changed after allotment.

For project layout and common areas, yes, two-thirds written consent binds the minority. For changes inside your own flat, no. Your individual consent is required and no majority can supply it.

No. The exception covers only minor alterations, and the builder must give you the architect's recommendation and a declaration. Demand both documents. A bedroom shrinking by 62 sq ft is rarely “minor”.

Generally no. RERA authorities treat clauses that contradict Section 14 as unenforceable. Quote the section in your complaint and ask the authority to disregard the clause.

The rate fixed by your state RERA rules, in most states SBI's highest marginal cost of lending rate plus 2 per cent, from the date you paid for the missing area.

Yes. Taking possession does not waive a carpet shortfall or an unauthorised plan change, especially if you objected in writing. File within the limitation your state rules prescribe, and sooner is always safer.

It helps, but pair it with the RERA-registered plans. The registered record is what the authority enforces.

Download the layout and carpet area dispute checklist (PDF).