This can be worked out by knowing the difference between the super built area and carpet area.
Difference between super built up area and carpet area.
The built up area is the sum of carpet area and the thickness of walls of the housing unit whereas the super built up area is the total sum of the built up area and the space occupied by common areas.
Bua consists of carpet area area covered by inner and outer walls and additional areas mandated by the authority such as flower beds dry balcony etc.
Some builders take into account the carpet area while charging you but this is only in the rarest of the rare cases.
The more the amenities the higher the super built up area.
Developers add a loading factor of 25 or 30 per cent or a multiplying factor of 1 25 or 1 3 to calculate.
90 of the developers calculate the base cost on the basis of the super built up area.
Often the actual usable area is much lower than the super built up area.
For instance the carpet area of an apartment is 500 sq ft a nd the ratio between super bui lt up ad carpet area is 75 25 or i would say carpet area is 75 percent of super built up a rea.
Refer the below table for better understanding.
Carpet area is the area covered by a carpet and is often 70 per cent of the built up area.
Super built up area means the total area covered by an apartment building including common areas like a park gardens playgrounds swimming pool gym club house etc.
Carpet area builtup area and super built up area difference table.
So now carpet area 75 percent of su per built up area then super built up area 50 0 25 percent of 500 sq ft 500 125 625 sq ft.