Real Estate Formula • Published on September 01, 2026 • Last updated September 01, 2026
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The net usable floor space within the walls of a unit
Portion of the built-up area occupied by walls, columns, and balconies, typically 10-20%
Built-Up Area adds the thickness of walls and any balcony space to the Carpet Area, representing a unit's full physical footprint. Since most listings and price quotes reference Built-Up (or Super Built-Up) Area rather than Carpet Area, this formula helps buyers convert between the two to estimate real usable space or verify a quoted built-up figure.
Most Indian residential projects fall in the 10-20% range, with 15% being a commonly used estimate when the exact figure isn't disclosed by the builder.
No — Built-Up Area only adds walls and balconies to Carpet Area, while Super Built-Up Area further adds a proportionate share of common building areas like lobbies, stairs, and elevators.
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