Carpet Area in Your Documents vs What the Brochure Says

You've shortlisted two 2BHK flats. Flat A is quoted at ₹85 lakh for "1,250 sq ft" in the brochure. Flat B is ₹82 lakh for "1,100 sq ft." On the surface, Flat A looks like better value per square foot. Then you open the draft sale agreement for Flat A and see a number you didn't expect: 920 sq ft. Not 1,250. The brochure number was never the area you're actually buying — it was super built-up area, padded with a share of the lobby, stairwell, lift shaft, and clubhouse. The 920 sq ft in the agreement is the carpet area: the space inside your own walls that you can actually put a carpet on.

This gap between the marketing number and the legal number is one of the most common sources of buyer confusion in Indian real estate, and it directly affects your real cost per square foot. If you don't reconcile the two, you can end up paying more for less — and not realise it until you're standing in an empty flat with a tape measure.

This article walks you through exactly how to read carpet area across your documents, cross-check it against the brochure's bigger number, and compute the true ₹/sq-ft you're paying so you can compare projects like-for-like.

Carpet Area, Built-up Area, and Super Built-up Area — De-jargonized

Three area terms show up across Indian real estate paperwork, and builders have historically used them inconsistently:

• Carpet area — the net usable floor area inside the walls of your unit, excluding the thickness of internal and external walls. This is the space you can actually walk on and furnish. Balconies and open terraces were traditionally excluded, though under RERA's definition, some flats now separately disclose balcony/terrace area rather than folding it silently into "carpet."
• Built-up area — carpet area plus the area occupied by your unit's own walls (internal and external) and sometimes an attached balcony. It's larger than carpet, but still specific to your unit.
• Super built-up area (sometimes called "saleable area") — built-up area plus a proportionate share of common areas: lobbies, staircases, lift shafts, corridors, sometimes the clubhouse and garden. This is the number that inflates a brochure's headline figure, because it isn't standardised — one builder's loading factor might be 25%, another's 40%, for what is functionally the same flat.

Under the Real Estate (Regulation and Development) Act, 2016 (RERA), developers are required to quote and sell on carpet area, not super built-up area. This was a deliberate reform: before RERA, "super built-up" was the default marketing unit, and buyers had no easy way to know how much of what they paid for was actually livable space versus a share of the building's common infrastructure. Despite the law, older brochures, resale listings, and even some ongoing project marketing materials continue to headline the bigger super built-up number because it looks more attractive — the RERA-mandated carpet-area figure typically only shows up in the fine print of the agreement and the state RERA filing.

Loading factor is the shorthand for the gap between carpet and super built-up: a "30% loading" project means the super built-up area is roughly 1.3x the carpet area. Because loading factors vary by builder, by project amenities, and sometimes by wing within the same project, you cannot assume a consistent ratio. A flat with a large clubhouse and multiple lift lobbies will often carry a higher loading than a simpler, no-frills block — even if both have identical carpet area.

Where Carpet Area Actually Appears in Your Paperwork

To reconcile the numbers, you need to look at three places, in this order:

1. The brochure / marketing collateral. This usually states super built-up area (sometimes labelled "saleable area") as the primary number, often in bold, next to the price. Carpet area may or may not appear here at all, or may be buried in a footnote.
2. The state RERA project filing. Every registered project has a public RERA listing on the relevant state's RERA portal, which discloses the carpet area of each unit type as declared by the promoter at registration. This is a regulatory disclosure, not marketing copy, so it should match what ends up in your agreement — cross-check it before you sign anything.
3. The Agreement for Sale (and eventually the sale deed). The legally binding document must state carpet area per the RERA Act, 2016. This is the number that has actual legal weight if there's ever a shortfall dispute. If the built-up or super built-up area is mentioned at all in the agreement, it should be clearly labelled as such and not conflated with carpet area.

If these three numbers don't line up — say, the RERA filing says 950 sq ft carpet but your draft agreement says 900 — that's a discrepancy worth raising with the developer and, ideally, your own lawyer before you pay anything beyond a token amount. Public filings and agreements are facts you can check yourself; DrawMagic's role in this process is to help you organise and cross-reference these facts, not to certify or guarantee any builder's numbers.

Step-by-Step: Reconciling Carpet Area Across Your Documents

1. Pull the brochure's stated area and price. Note whether it says "carpet," "built-up," or "super built-up" — brochures often don't label it clearly, which is itself a signal to dig further.
2. Look up the project on the state RERA portal. Search by project name or registration number; the disclosure will list carpet area per unit/type as filed by the promoter.
3. Request or review the draft Agreement for Sale. Confirm the carpet area figure matches the RERA filing. Ask the builder in writing (email, not just verbal) to explain any mismatch.
4. Convert the brochure's super built-up price into a carpet-area rate. Take the total price and divide it by the carpet area (not the super built-up area) to get your true ₹/sq-ft.
5. Repeat for every project you're comparing. Only compare projects on carpet-area ₹/sq-ft — never compare one project's super built-up rate against another's carpet rate.
6. Flag balconies/terraces separately. If the agreement lists balcony or terrace area apart from carpet area, don't casually add it back in when comparing livable space unless you're comparing like-for-like across both projects.
7. Keep every version of the number on file. Save the brochure, the RERA filing screenshot (with date), and the agreement draft — you'll want an as-of-date paper trail if a dispute arises later.

You can run this reconciliation manually with a calculator, or use DrawMagic's carpet-area calculator to convert a super built-up quote into a carpet-area rate in seconds and see the comparison side by side.

Comparison Table: Reading the Three Area Terms

Geographic and Regulatory Notes

• RERA (Real Estate (Regulation and Development) Act, 2016) is a central law implemented through state-level Real Estate Regulatory Authorities, so the portal you check (Maharashtra's MahaRERA, Karnataka's RERA, UP-RERA, and so on) depends on where the project is located — always use the RERA portal for the state the property is in.
• Stamp duty and registration charges are calculated on the agreement value (or the state-notified circular rate/ready reckoner rate, whichever is higher) — not directly on carpet area — but area disputes most often surface later, at possession, when the actual measured carpet area is handed over and can differ slightly from what was originally filed.
• If you're also weighing overall affordability before committing to a project, DrawMagic's buyer overview is a useful starting point to see how documentation review fits into the broader buying process.

Real-World Scenario: The "Cheaper" Flat That Wasn't

Consider a buyer comparing two 2BHK options in the same micro-market. Flat A: ₹85 lakh, brochure states "1,250 sq ft" (super built-up), loading factor 36%, so carpet area works out to roughly 920 sq ft. That's about ₹9,240 per carpet sq ft. Flat B: ₹82 lakh, brochure states "1,100 sq ft" (super built-up), loading factor 22%, carpet area roughly 900 sq ft. That's about ₹9,110 per carpet sq ft. On the brochure numbers alone, Flat A looked bigger for a similar price. On carpet-area terms, Flat A is actually barely different in size and, once you account for the price difference, doesn't come out meaningfully cheaper per square foot of usable space — the buyer needs the same rigor for either option before choosing.

Section 7: Worked Example — Converting Super Built-up to Carpet-Area Rate

Say a brochure quotes: Price ₹90,00,000 for 1,300 sq ft (super built-up), with a stated loading factor of 33%.

1. Carpet area ≈ 1,300 ÷ 1.33 ≈ 977 sq ft.
2. Super built-up rate = ₹90,00,000 ÷ 1,300 = ₹6,923/sq ft (this is the "attractive" number in the brochure).
3. True carpet-area rate = ₹90,00,000 ÷ 977 ≈ ₹9,212/sq ft (this is what you're actually paying for usable space).

Running this same conversion for every shortlisted project — using DrawMagic's carpet-area calculator rather than doing mental math under time pressure at a site visit — turns an apples-to-oranges brochure comparison into an apples-to-apples one.

Pro Tips

1. Always ask the builder to state carpet area in writing, and ask specifically what loading factor was used to arrive at the super built-up figure.
2. Cross-check the RERA filing before you pay any token/booking amount — it's a free, public disclosure and takes minutes.
3. If balcony or terrace area is quoted separately, ask whether it is included or excluded from the carpet-area figure in the agreement.
4. For resale flats (not covered by a builder's RERA filing), ask the seller for the original booking documents and the sale deed's stated area, since resale listings often still use loose super built-up language.
5. Keep a simple spreadsheet of every shortlisted project's carpet area, price, and computed carpet-area rate — it removes the emotional pull of a big headline number.

Common Mistakes to Avoid

1. Comparing one project's super built-up rate to another's carpet-area rate — always normalise both to carpet area first.
2. Assuming loading factor is roughly the same across projects; it commonly ranges from 20% to 40%+ depending on amenities and building design.
3. Treating the brochure's area figure as final — only the RERA filing and the Agreement for Sale carry legal and regulatory weight.
4. Skipping the RERA portal check because the project "looks established" — even large developers occasionally have filing mismatches worth clarifying.
5. Not keeping a dated record of the numbers you were shown, which makes it harder to raise a discrepancy later.

How This Fits Into Your Broader Diligence

Carpet-area reconciliation is one piece of a larger documentation-literacy habit. DrawMagic's evolving buyer-intelligence companion is being built to help first-time buyers organise exactly this kind of cross-checking — area figures, locality context, and public-record facts — in one place, alongside a private voice-AI you can talk through your specific flat comparison with. It's shipping and evolving, so the earlier you join, the sooner you get access as new capabilities roll out.

To understand how DrawMagic approaches this kind of public-record information responsibly — surfacing facts and sources rather than issuing verdicts — see our responsible AI approach. And if you're not sure where in your buying journey documentation review like this belongs, our buyer overview lays out the bigger picture.

DrawMagic is an information and software platform. It does not act as a broker, financial or legal advisor, or certifier of any builder or project. Always confirm area figures with the RERA portal, the developer in writing, and your own lawyer before making any payment beyond a refundable token.

Key Takeaways

• RERA (2016) mandates that developers sell on carpet area, the actual usable floor space within your unit's walls — not the larger super built-up figure often used in brochures.
• Super built-up area adds a loading factor (commonly 25-40%) for shared spaces like lobbies, lifts, and staircases; this loading is not standardised across builders.
• Always reconcile three sources: the brochure, the state RERA portal filing, and the Agreement for Sale — the agreement's carpet-area figure is the legally binding one.
• Compute price per carpet-area square foot, not per super built-up square foot, when comparing two or more projects.
• A brochure that "looks bigger" on super built-up area can be nearly identical, or even costlier, on a true carpet-area basis.
• Stamp duty is calculated on agreement value or circular rate, not directly on carpet area, but area shortfalls typically surface as disputes at possession.
• Save dated copies of the brochure, RERA filing, and agreement draft to have a paper trail if figures don't match.
• Use DrawMagic's carpet-area calculator to quickly convert any super built-up quote into a true carpet-area rate.
• DrawMagic is an information platform, not a broker or legal advisor — always confirm final figures with the developer in writing and your own lawyer.

FAQ

Q: Is super built-up area illegal to advertise now? A: RERA requires sale to be transacted on carpet area, but it hasn't fully eliminated super built-up language from general marketing collateral. Always check the RERA filing and agreement for the carpet-area figure that actually governs the sale.

Q: Does carpet area include my balcony? A: It depends on how the specific project's documents define it — some agreements list balcony/terrace area separately from carpet area. Ask the builder to clarify this explicitly in writing for your unit.

Q: What if the carpet area at possession is smaller than what was agreed? A: This is exactly the kind of discrepancy your dated documentation trail (RERA filing + agreement) is meant to support — raise it with the developer and consult a lawyer about your options under the agreement and RERA rules.

Ready to organise this diligence in one place? Join the waitlist for DrawMagic's buyer-intelligence companion and use the carpet-area calculator on your next shortlist today.