Carpet Area vs Built-Up vs Super Area Explained
Two flats can both be sold as 1,500 square feet and give you very different amounts of usable space. The reason is the three ways area is measured in Indian real estate: carpet, built-up and super area. Understanding the difference is the single best way to compare flats honestly and avoid overpaying for space you cannot use. Here is what each term means and how to read them.
The three areas at a glance
| Term | What it measures | Rough share of super area |
|---|---|---|
| Carpet area | The actual usable floor inside your walls | About 60 to 70 percent |
| Built-up area | Carpet plus the walls and balconies | About 75 to 85 percent |
| Super area | Built-up plus a share of common areas | 100 percent (the sold figure) |
The gap between carpet and super area is the loading, and it is where the confusion lives. A flat sold as 1,500 super square feet may give you only 900 to 1,050 square feet of real carpet, depending on how much common area the builder loads on.
Carpet area, the one that matters
Carpet area is the space you can actually lay a carpet on: the floor inside the walls of your flat, room by room. It excludes the wall thickness and the common areas. This is the number that tells you how big your home really is, and under the RERA law builders must now declare and sell on carpet area, which brought much-needed honesty to the market. When you compare flats, compare carpet to carpet.
Built-up area
Built-up area is your carpet area plus the space taken by the walls, and usually the balconies and any dry areas. It runs a little larger than carpet, typically 10 to 15 percent more. It is a genuine measure of your flat's footprint, but it is not the space you live in, so treat it as a middle number rather than the one to buy on.
Super area, the sold figure
Super area, sometimes called saleable area, is built-up plus your share of the building's common spaces: the lobby, staircases, lifts, corridors and sometimes the clubhouse. It is the biggest number and the one builders usually quote in the price, because a per-square-foot rate looks lower when spread over super area. The catch is the loading factor, the ratio of super to carpet. A tower with heavy amenities and wide corridors loads more common area on, so two flats at the same super-area rate can differ a lot in real usable space.
How to use this when buying
- Always ask for the carpet area in writing, since that is what RERA mandates and what you actually live in.
- Work out the loading factor: divide super area by carpet area, and a lower ratio means more usable space per rupee.
- Compare the real per-square-foot rate on carpet, not super, to compare flats fairly.
- Watch the balcony and terrace terms, which some builders price separately.
Frequently asked questions
What is the difference between carpet area and super area?
Carpet area is the usable floor inside your walls, while super area adds the walls, balconies and a share of common areas like lobbies and lifts. Super area is larger and is the figure usually quoted in the price.
Which area should I look at when buying a flat?
Carpet area, since it is the space you actually use and what RERA requires builders to declare. Compare flats carpet to carpet, and check the price per carpet square foot.
What is a loading factor?
It is the ratio of super area to carpet area. A higher loading means more of what you pay for is common area rather than your own flat, so a lower loading gives more usable space per rupee.
Does RERA use carpet area?
Yes. Under RERA, builders must declare and sell on carpet area, which is defined as the net usable floor area inside the walls, excluding common areas. This made price comparison far more honest.
Is built-up area the same as carpet area?
No. Built-up area adds the wall thickness and usually the balconies to the carpet area, so it runs about 10 to 15 percent larger. It is a middle number between carpet and super area.
Why do builders quote super area?
Because a per-square-foot rate looks lower when spread over the larger super area. Always convert the quote to a carpet-area rate so you compare flats on the space you can actually use.
How do I calculate the loading factor?
Divide the super area by the carpet area. If a flat is 1,500 super and 1,000 carpet, the loading is 1.5, meaning half of what you pay for is common area. A lower number is better value.
Is the balcony included in carpet area?
Under RERA the balcony is counted separately as balcony area, not inside the net carpet figure. Check how the builder lists and prices the balcony so you know exactly what the carpet number covers.
Carpet, built-up and super area are three different numbers for the same flat, and only carpet tells you how much home you really get. Always ask for the carpet area, work out the loading factor, and compare flats on the carpet rate. More buying guides on the blog, and browse homes in our residential listings.
