1. Built-Up Area (BUA)
The total area covered by the building’s perimeter, including all walls, rooms, and shared spaces like lobbies and staircases.
- Includes: Walls, internal partitions, and usable space within.
- Excludes: Open spaces like balconies.
BUILTUP AREA=CARPET AREA + WALL AREA
Uses:
- Property Tax calculation is done on basis of Built-up Area.
- Widely used by Gov Authorities (Municipal Corporation, Development Authorities)
2. Carpet Area
The actual usable area inside a property where carpets can be laid, excluding walls and structural elements.
- Includes: Bedrooms, living rooms, kitchens, bathrooms.
- Excludes: Walls, balconies, terraces.
CARPET AREA= BUILT UP AREA- EXTERNAL WALL AREA (AS PER RERA)
CARPET AREA= BUILT UP AREA- (EXTERNAL WALL+ INTERNAL WALL)
3. Super Built-Up Area
The built-up area plus a proportionate share of common areas in a building, like lobbies, staircases, and amenities. Often used in real estate for pricing apartments.
- Includes: Lobby, Lift Shaft, staircases, Pipe duct, Covered common facility.
- Excludes: Roof Terrace, Park, Garden, Play Area.
4. Floor Area Ratio (FAR)/Floor Space Index (FSI)
A ratio that defines the permissible floor area to the plot size.
