Carpet Area vs Built-Up and Super Built-Up Area: How to Compare Flat Prices

Two flats. Two glossy brochures. One is quoted at ₹7,000 per sq ft and the other at ₹7,400.

The first looks cheaper until you ask a better question: price per square foot of what?

A rate applied to 1,800 sq ft of saleable area cannot be compared directly with a rate applied to 1,300 sq ft of carpet area. The labels may describe different baskets of space. One may include a share of the lobby, stairs and lift well; another may separate a balcony; a third may use a project-specific built-up calculation.

For a buyer, the useful comparison starts with the space legally described as carpet area, then reconciles every additional square foot and every rupee in writing.

Legal sources checked on 5 September 2026. The numerical examples are hypothetical, and the relevant state rules and agreement govern an actual purchase.

Carpet area has a statutory meaning

Section 2(k) of the Real Estate (Regulation and Development) Act, 2016 defines carpet area as the net usable floor area of an apartment, with a specific set of inclusions and exclusions.

The part buyers most often miss is this: internal partition walls are included.

The statutory RERA carpet area excludes:

• the area covered by external walls;
• areas under service shafts;
• an exclusive balcony or verandah area; and
• an exclusive open terrace area.

It includes the area covered by the apartment’s internal partition walls. So a casual instruction to measure only the clear floor that can physically take a carpet does not reproduce the statutory calculation.

An exclusive balcony, verandah or open terrace may still be allotted for your use and priced under the agreement. Its exclusion from carpet area does not make it communal or free. It means that the area should remain separately identifiable instead of being silently folded into the statutory carpet figure.

Built-up area needs its own written definition

“Built-up area” is widely used in plans, valuations and sale conversations, but you should not convert it from carpet area using a universal percentage.

In ordinary project usage, it may combine carpet area with some wall area and exclusive-use spaces. Which walls, how shared walls are apportioned, whether balconies are included and how measurements are taken can vary with the document and local practice. A statement such as “built-up is always carpet plus 20 per cent” is therefore a shortcut, not a reliable reconciliation.

Ask the promoter or seller for a component table instead:

The table forces a simple discipline: every larger total must be explainable as components, not merely as a percentage printed beside a floor plan.

Super built-up or saleable area is a larger basket

“Super built-up area” and “saleable area” are often used for an apartment area plus an allocated share of common areas. Yet the label alone does not tell you which common areas were counted, which allocation method was used or whether exclusive balcony and terrace areas sit inside the total.

Telangana shows why sweeping national claims do not work. Its Real Estate Rules, 2017 define saleable area as carpet area plus exclusive verandah, balcony or terrace area, proportionate common areas, and any other agreed area for which proportionate cost is collected. Rule 4(3) also requires an ongoing project’s apartment size to be disclosed on carpet area even where it had earlier been sold on another basis. The annexed model agreement records carpet and saleable areas, and provides for a price break-up.

That combination matters. Carpet-area disclosure and a separately explained saleable-area price can appear in the same regulatory framework. It would be wrong to tell a buyer that the mere appearance of “saleable area” proves an illegal quote. The real questions are whether the statutory carpet area is disclosed, whether the larger area is defined, and whether the agreement explains the price and inclusions.

Loading has two possible denominators

Loading is shorthand for the gap between carpet area and a larger quoted area. It is useful only after the speaker tells you what is being divided by what.

Suppose a flat has:

• saleable area: 1,800 sq ft
• RERA carpet area: 1,200 sq ft
• difference: 600 sq ft

If the calculation is difference divided by carpet area, loading is 600 ÷ 1,200 = 50%.

If it is difference divided by saleable area, the gap is 600 ÷ 1,800 = 33.3%.

Both percentages describe the same two area figures. They sound very different because their denominators differ. When an advertisement says “only 33% loading”, ask for the formula and both underlying areas. Better still, compare the carpet-to-saleable efficiency directly: 1,200 ÷ 1,800 = 66.7%.

Efficiency is not a quality score by itself. A project may have generous shared facilities that you value. The calculation simply tells you how much private statutory carpet area sits behind the marketed total.

A lower advertised rate can cost more per carpet square foot

Consider this hypothetical comparison. It is arithmetic for evaluating quotations, not market data or a valuation of any real project.

Flat A carries the lower advertised rate. But its base price is ₹20,000 higher, and every carpet square foot costs about ₹823 more than in Flat B.

The calculation is:

Comparable base price ÷ RERA carpet area = effective base price per carpet square foot.

This works only if the numerators are comparable. Do not compare one quote that includes parking, a floor-rise charge or clubhouse contribution with another that excludes them. Ask for matching base-price inclusions first, then place taxes, registration costs, maintenance deposits and other charges in separate rows.

Guidance or circle value serves a different purpose from a negotiated commercial rate. If you need that distinction, read our guide to circle rate, market value and stamp duty.

The plan and agreement should tell the same area story

A clean comparison is more than spreadsheet arithmetic. It connects the area statement to the records for the exact apartment.

Start with the project’s RERA record, where applicable, and the unit’s proposed agreement. Obtain the sanctioned floor plan and the area computation sheet prepared for that flat type. Our building plan and layout approval guide explains why a marketing layout is not a substitute for the sanctioned plan.

Then reconcile these identifiers across the quotation, allotment or agreement, plan and RERA material:

1. project name and registered phase;
2. tower or block;
3. flat type and number;
4. floor;
5. RERA carpet area;
6. exclusive balcony, verandah or terrace area;
7. the defined saleable or super built-up components; and
8. the rate, price base and itemised charges.

Do not assume that every flat sharing a type code has the same configuration. A corner stack, refuge-floor relationship, terrace, mirrored plan or later sanctioned revision may change the relevant details. Ask the promoter to confirm in writing which drawing and area sheet govern your unit.

For a completed building, add the final area confirmation and the occupancy certificate to the reconciliation. An occupancy certificate addresses permission to occupy the covered building or portion; it does not replace the unit-level price and area records. See the distinction in our occupancy and completion certificate guide.

Common areas are rights as well as arithmetic

A share of a lobby or staircase is not a room inside your apartment. But common areas still matter to ownership, use, maintenance and cost.

In DLF Limited v Manmohan Lowe (2013), the Supreme Court examined the rights of apartment owners in a Haryana development under Haryana-specific legislation and declarations. For the common areas covered by the provisions it was discussing, the Court described owners’ undivided interest as being “in the percentage expressed in the declaration”. It distinguished facilities serving the apartment complex from certain community facilities serving the larger colony.

The decision is useful for one limited lesson: a common-area allocation is not merely decorative brochure mathematics. It sits alongside the governing statute, declaration and apartment documents. The judgment does not create one national formula for super area, and its conclusions about the particular community facilities should not be transplanted to every project.

Send one written reconciliation request

Before paying a substantial booking amount, send a short request tied to the exact unit. You can adapt this wording:

Please provide the RERA carpet area and a component-wise reconciliation to the quoted built-up, super built-up or saleable area for Flat [number], [type], [floor], [tower], [phase]. Please identify the sanctioned plan revision used, separately state exclusive balcony/verandah and open-terrace areas, explain the common-area allocation and confirm every item included in the quoted base price and rate.

Also request the draft agreement and enough time for legal and technical review. If the response changes a number, ask for a corrected, dated document rather than relying on a chat message.

For an under-construction purchase, check the promoter’s obligations and agreement terms in the RERA guide for selling or transferring a flat. For an existing home, the same identity discipline belongs in a broader Hyderabad resale-flat document check: match the flat, tower and floor across the seller’s deed, sanctioned plan, occupancy material and association records.

The practical rule is simple. Keep three columns for every candidate: private carpet area, separately identified exclusive areas, and allocated common area. Compare money only after the columns use the same definitions.

Related Reading

• Approved building plan and layout approval guide - Check the drawing and approval behind the area statement.
• Occupancy certificate vs completion certificate - Understand what each completion-stage record establishes.
• RERA obligations when selling a flat - Review project and agreement obligations when a booking changes hands.
• Buying a resale flat in Hyderabad - Match the unit identity across title, approval and association records.
• Circle rate, market value and stamp duty - Keep guidance value separate from the negotiated price comparison.

Assetly is a property document management platform for Indian property owners.