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Built-up area is carpet area plus the area occupied by walls (and often other enclosed utility spaces), used widely for construction cost planning.
Area & measurement · Also: Built up area, BUA
Built-up area is carpet area plus the area occupied by walls (and often other enclosed utility spaces), used widely for construction cost planning.
Plain-language explanations for planning and learning. Local codes, consultant advice and contract documents take precedence over glossary summaries.
For an independent house, built-up area typically means the covered constructed footprint on each floor including wall thicknesses. For apartments, developer definitions can add dry areas or balconies differently — always read the agreement. Varnarc construction-cost and “required for X sq ft” landings use built-up area as the planning input because material thumb-rules and ₹/sq ft rates attach more naturally to constructed area than to carpet alone.
Example: 1,500 sq ft built-up on two floors is the reference size on several Varnarc cost pages — cement/steel thumb-rules are applied to that built-up figure, not to carpet area.
| Unit | Notes |
|---|---|
| sq ft / sq m | Primary input for many cost and quantity landings |
Carpet area
Carpet area is the net usable floor area inside the walls of a home — roughly the area you can put a carpet on — excluding external walls and common building areas.
Super built-up area
Super built-up area is built-up area plus a proportionate share of common spaces (lobbies, stairs, clubhouse, etc.), often used as the “saleable” area in apartment marketing.
Plinth area
Plinth area is the built-up covered area measured at the floor level of the plinth (the platform above ground on which the building stands), including walls.
FSI
FSI (Floor Space Index) is the ratio of total built-up floor area allowed on a plot to the plot area — it caps how much you can construct.
Each Varnarc glossary term includes a simple definition, a technical explanation, a worked example, units where relevant, and links to calculators or materials so you can take the next action. Thin one-line dictionary stubs are not published.
Glossary 2026.08.1
Rules of thumb exist but vary. Prefer measured drawings or the definition in your sale agreement rather than a generic factor.