The area of an apartment, not inclusive of the area of the walls is known as carpet area. This is the area that is actually used and in which a carpet can be laid. When the area of the walls including the balcony is calculated along with the carpet area, it is known as built-up area. The built-up area along with the area under common spaces like lobby, lifts, stairs, garden and swimming pool is called super built-up area.
Before purchasing property from a company, it is necessary to verify with the Registrar of Companies that the property is not mortgaged or is not being used as a security against a loan, otherwise it is not considered a freehold property.