Others may treat these spaces like internal rooms and consider the entire area.
This is the gross area of a flat. Besides the carpet area, it includes the space covered by the wall thickness and ducts.
Generally, it is 10-15 per cent more than the carpet area of the flat.
The current trend is to consider this as the saleable area. It is calculated by adding the markup for common spaces to the built-up area.
These common spaces include the ones on the floor (lifts, staircases etc) and those in the building (entrance lobby, electrical room, pump room, flower beds etc).
Basically, it includes all the common amenities that are built, but not directly charged to the customer.
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Common spaces include all common amenities.
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