What is a built-up area? The built-up area of a premise is measured from the external perimeter wall surfaces. It is the carpet area plus the wall thickness along with other unusable areas within the apartment such as the dry balcony, terrace, flower beds, etc. It is always more than the carpet area.

What is the difference between carpet and built up?

Carpet area is the area that can actually be covered by a carpet while built-up area is the area that comes after adding carpet area and wall area.

How much difference between carpet area and built up area?

For calculating the total carpet area, let us assume you have a built-up area of 1,000 sqft, then the carpet area will be 70 per cent off 1,000 sqft, that is equal to 700 sqft. The built-up area is the comprehensive area which is the sum of the carpet area and the thickness of walls of the housing unit.