Say two listings in Kondapur both advertise a 2 BHK of 1,200 sq ft. One is quoting carpet area. The other is quoting super built-up area. They are not the same size, and a buyer who visits both will feel it the moment they walk into the second one. Whoever listed that flat without saying which figure it was has just lost the buyer's trust, even if every number was technically true.
This is one of the oldest sources of friction in Indian real estate, and the fix costs nothing. Say which area you mean, every time.
The three figures, in plain words
Carpet area is the floor you can actually use inside the flat. Think of it as the area you could cover with carpet, wall to wall, room by room. RERA, the national law that regulates real estate projects, defines it as the net usable floor area of the flat: it counts the internal walls between rooms, but leaves out the external walls and the balconies and open terraces that belong to the flat.
Built-up area is carpet area plus the space taken up by the walls, and usually the flat's own balconies. It is the footprint of the flat as a whole.
Super built-up area is built-up area plus a share of the building's common spaces: the lobby, staircases, lift shafts, corridors, and in some projects the clubhouse and other shared facilities. It is sometimes called saleable area.
The gap between carpet and super built-up is called loading. Say a flat has 1,000 sq ft of carpet area and is sold as 1,400 sq ft super built-up. The extra 400 sq ft is loading: space you pay for but share with every other flat in the building. How much loading a project carries varies a great deal from builder to builder, which is exactly why a bare number misleads.
What RERA changed, and what it did not
For projects registered under RERA, the builder has to state the carpet area, and the sale is expected to be priced on it. That was a big improvement for buyers of new flats.
But the old habit did not vanish. Resale sellers in older buildings may only remember the super built-up figure from their original agreement. Many buyers still think in super built-up terms because that is how their parents bought. So on any given day, the figures floating around a single locality are a mix of all three.
The details of what must be disclosed, and how, are set state by state and change from time to time. For a specific project, check your state RERA authority's website, where registered projects list their declared carpet areas.
Where the confusion costs you
It costs you on price per sq ft. If you quote ₹9,000 per sq ft on super built-up and the listing next door quotes ₹11,500 per sq ft on carpet, the buyer thinks yours is the bargain. They may be the same price in real terms, or yours may be dearer. Either way, the comparison was meaningless and the buyer will eventually work that out.
It costs you at the visit. A buyer who expected 1,200 sq ft of usable space and walks into something far smaller does not blame the building. They blame the person who wrote the listing.
It costs you with the family. Buyers send listings to parents, spouses and in-laws. The one relative who knows the difference will ask which figure it is, and if you have not said, your listing starts to look careless.
How to state area on every listing
These rules take a minute per listing and remove the problem entirely:
- Never write a bare number. Write "1,050 sq ft carpet", not "1,050 sq ft".
- If you know two figures, show both: "1,050 sq ft carpet, 1,380 sq ft super built-up".
- When you quote a rate per sq ft, say which area it is based on.
- Use the same basis across all your listings, so buyers can compare them.
- List balconies and terraces separately, since carpet area leaves them out.
- If you are unsure, say where the figure came from: "super built-up, as per the original sale agreement".
That last one matters. If a resale owner does not know the carpet area, do not guess. Ask for the sale deed or the original agreement, or measure the flat. A guess that turns out wrong is worse than an honest "super built-up as per agreement".
Machines need the label too
Search engines and AI assistants read your area figures and try to compare them, just as buyers do. If your page publishes "1,200" with no label, a tool answering "2 BHK above 1,000 sq ft carpet in Kondapur" has no way to know whether yours qualifies. Area should be published as a number, a unit and a kind, together. That is part of what a well-built listing page does behind the scenes, and it is shown on our how your site gets found page.
The same label belongs on your floor plans. A plan with room dimensions lets a buyer check the carpet figure for themselves, which is one reason floor plans are the image serious buyers study.
Your job this week
Open every live listing and look at the area line. Add the kind to every figure that lacks one. For any listing where you are not sure, message the owner today and ask for the page of the agreement that states the area. Then check your rate-per-sq-ft claims and make sure each one says its basis.
It is also worth adding the project's RERA number wherever there is one, since buyers can use it to look up the declared carpet area themselves. Our piece on putting the RERA number on every listing explains why.
