The one area a promoter can be held to is the carpet area, and RERA Karnataka is unusual in publishing it flat by flat. On just over half of its registrations the promoter files a table with one row for every unit: floor, flat number, type, carpet area, the balcony and terrace area that is the flat's alone, its share of the building's common areas, its share of the land and its parking. If your flat is in one of those projects, you can check its size against the promoter's own sworn filing before you sign anything. This guide shows where the table is, what each column means, and the one mistake in it you should know to look for.

Key takeaways

  • RERA Karnataka publishes a row for every flat on 4,687 of its 9,040 registrations, 760,060 rows in all, as updated on 19 October 2026.
  • The carpet area column is in square metres; multiply by 10.764 for square feet before comparing it with a brochure.
  • The median Bengaluru Urban 2BHK is filed at 69.7 square metres, about 750 square feet, and the median 3BHK at 101.4 square metres, about 1,091 square feet.
  • About 15 percent of 2BHK rows carry a figure like 725 in the square-metre column, which is almost certainly square feet; ask which unit your agreement uses.

Why this table matters more than the brochure

A brochure quotes a size, usually a super built-up area, which counts the walls, the balconies and a share of the lobby, lifts and clubhouse. The law fixes the price to something narrower. Under section 2(k) of the RERA Act, carpet area is the net usable floor area of the flat, excluding external walls, service shafts and the flat's exclusive balcony or terrace, and including internal partition walls. A promoter may describe the flat any way it likes in an advertisement, but the agreement for sale must state the carpet area, and that is the figure the filing lets you check. Why the three areas differ is set out in carpet area vs built-up vs super built-up.

The gap is not small. ANAROCK put the average size of a flat launched in Bengaluru at 1,660 square feet in 2024, up from 1,280 in 2019, and those figures follow the size quoted at sale. The carpet areas promoters file for the same city are much smaller:

Median filed carpet area by flat type, Bengaluru Urban(square metres)
1BHK37.2 sq m (400 sq ft)
2BHK69.7 sq m (750 sq ft)
2.5BHK86.2 sq m (928 sq ft)
3BHK101.4 sq m (1,091 sq ft)
4BHK173.2 sq m (1,864 sq ft)

Source: ReraGenie analysis of the per-flat tables on RERA Karnataka registrations in Bengaluru Urban, as updated on 19 October 2026; rows filed in square feet excluded

Finding your row, step by step

Reading your flat's row on RERA Karnataka
  1. 1

    Open the project

    Type rera.karnataka.gov.in yourself and search the registration number from the advertisement.

  2. 2

    Go to the units

    In the project details, find the table of units. A project with several towers files one table per tower.

  3. 3

    Find your flat

    Match the tower, the floor and the flat number exactly as the allotment letter or draft agreement writes them.

  4. 4

    Read the columns

    Carpet area, exclusive common area, association common area, undivided share and parking lots, in that order.

  5. 5

    Convert and compare

    Multiply square metres by 10.764 and compare with the agreement draft. Red flag: the draft states a larger carpet area than the filing.

  6. 6

    Ask in writing

    Any difference, or a figure in the wrong unit, goes to the promoter in an email before you pay more than the booking amount.

Source: ReraGenie, from the RERA Karnataka project page as served to the public

What each column means

Carpet area. The figure the law cares about, in square metres. This is what your price should be stated against.

Exclusive common area. Space that is yours alone but is not carpet: the balcony, the utility area, a private terrace. It is listed separately because the Act excludes it from carpet.

Association common area. The flat's share of the building's common spaces, such as corridors, lobbies, lift wells and the clubhouse. It is what turns a carpet area into the larger figure in a brochure, and it is owned in common, not by you alone.

Undivided share. The flat's share of the land under the project, often written as UDS. It matters most in a joint development, where the landowners and the developer each hold flats, and at the end of a building's life, when the land is what remains.

Parking lots. The number of parking spaces allotted to the flat. Across Karnataka, 90.5 percent of flat rows list at least one.

The mistake to look for: square feet in a square-metre column

The heading says square metres, and most promoters fill it that way. Some do not. Of 262,042 rows for 2BHK flats across the state, 40,278, or 15.4 percent, on 533 projects, carry a carpet area of 250 or more. As square metres that would be a large bungalow; as square feet it is an ordinary flat, so the figure is almost certainly square feet in the wrong column. It does not mean the flat is smaller or larger than promised. It means you cannot read the size from the filing alone, so ask the promoter which number and which unit the agreement will state.

Warning

If your row reads 725 for a 2BHK, do not convert it. Divide by 10.764 instead, compare the result with the draft agreement, and ask the promoter to confirm the unit in writing. A carpet area is only enforceable once it is written into the registered agreement.

If you are comparing towers, a free account keeps your Karnataka shortlist in one list you can open on any device while you check each one's rows.

An analogy: the itemised hotel bill

A hotel can quote one figure per night, or it can print the room rate, the taxes and the service charge on separate lines. The total may be the same; only the itemised bill lets you check each part. A brochure size is the one figure. The unit table is the itemised bill: the carpet you pay for, the balcony that is yours, the common share that is everyone's, and the land beneath, each on its own line.

Ananya and Karthik find row 1104

Names and numbers in this story are illustrative. The brochure for the 2BHK Ananya and Karthik liked said 1,180 square feet. Karthik found tower B, floor 11, flat 1104 in the unit table: carpet area 68.9 square metres, exclusive common area 8.2, association common area 25.1. In square feet that is 742 of carpet, 88 of balcony and 270 of common area, 1,100 in all, with the remainder presumably walls. Nothing was wrong: the brochure had added up the parts. But the draft agreement said 755 square feet of carpet, not 742, and they asked the promoter to correct it before signing. The corrected draft said 742.

What the table cannot tell you

The table is what the promoter filed, not a survey of the built flat. Whether the flat delivered matches it is a question for a tape measure at possession, and what you can claim if it falls short is in carpet area shortfall and your refund rights. Where the table sits among the other checks on the portal is in how to check a project on RERA Karnataka, and where it fits in the purchase as a whole is stage six of buying a flat in Karnataka. Older registrations, about half the register, use a page format with no per-flat table; for those, ask the promoter for the floor plan with dimensions.

What the free page shows

ReraGenie's free page for a RERA Karnataka project shows how many units the latest filing records as sold or booked out of the total, and lists every document the promoter uploaded, including the tower spreadsheet and the sectional drawings where they were filed. The per-flat table itself is on the project's page on the RERA Karnataka portal, which is where to find your row. Buyer reports, the project watch and alerts cover MahaRERA projects only for now. Find the project from the Karnataka project list and open its documents.

Printable checklist

  • My flat's row found by tower, floor and flat number.
  • Carpet area converted to square feet (multiply by 10.764).
  • Figure is plausible for the flat type; if it looks like square feet, confirmed in writing.
  • Draft agreement states the same carpet area as the filing.
  • Balcony, common area share, land share and parking noted.

This article is educational and not legal advice. For a dispute, consult a lawyer who practices before your state's RERA.

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