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Carpet vs Built-up vs Super Built-up Area

The three area terms that confuse every buyer, explained simply — with a converter to find your real usable (carpet) area.

Super built-up area

sq ft

Loading (%)

Carpet area is what you actually use (RERA requires it to be declared). Built-up here is approximate (carpet + ~15% for walls).

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What the three area terms mean

Carpet areathe space you can actually use

Built-up area+ walls & balcony

Super built-up+ your share of lobby, stairs & lift

Term	What it includes	Example (2 BHK)
Carpet area	Usable floor inside your walls — where you can lay a carpet	~650 sq ft
Built-up area	Carpet area + the walls + balcony	~780 sq ft
Super built-up	Built-up + your share of common areas (the "loading")	~1,000 sq ft

Buyer tip: builders usually quote the super built-up area, but you only live in thecarpet area. RERA now requires the carpet area to be declared — always ask for it. The gap between super built-up and carpet is the "loading", and it's typically 20–35%.

Good to know

Builders usually quote the super built-up area, but you only actually live in the carpet area. The gap between them is the "loading" — your share of common spaces like the lobby and stairs. This tool converts a super built-up figure into the real carpet area so you know what you are truly getting.

What is the difference between carpet area and super built-up area?

Carpet area is the usable floor inside your walls. Super built-up adds the walls, balcony and your share of common areas (lobby, stairs, lift). You live in the carpet area but often pay for the super built-up.

What is a normal loading percentage?

Loading is typically 20–35%. A higher loading means less usable space for the same quoted size, so always ask for the RERA carpet area.