Guide
Plot area vs built-up area
Per-square-foot services like BOQ and bar bending schedules are priced on total built-up area — not plot area. Mixing them up is the most common reason an online estimate looks wrong.
Plot area
The area of your land: plot width × plot length. A 30 ft × 40 ft plot has a plot area of 1,200 sq ft.
Built-up area (per floor)
The covered area of one floor measured to the outside of the walls, including wall thickness, and typically balconies and staircases. Setbacks, open yards and parking outside the building are not included.
Total built-up area
The built-up area of all floors added together. This is the figure our calculator asks for.
- Ground floor 1,000 sq ft + first floor 1,000 sq ft = 2,000 sq ft total built-up area.
- Ground floor 900 sq ft + first floor 900 sq ft + headroom 120 sq ft = 1,920 sq ft.
Carpet area
The usable floor area inside the walls. It’s smaller than built-up area, so don’t use it for pricing BOQ or structural services.
Not sure of your figure?
Enter your best estimate in the instant quote and upload your plan. We confirm the area from your drawings before sending a final quotation.