(i) Floor Area –
This is the usable covered area of the building at any floor level. Floor area is calculated by deducting area of walls from plinth area.
(ii) Super built up Area –
When area of common use like staircase, corridors, lift lobbies, lift walls, machine rooms, duct walls, pump rooms, security cabins, panel room, water tanks, servant rooms/toilets, clubhouse, etc. is added proportionally to built up area, it is called as super built up area.
This term is mostly used for flats in multi dwelling units like apartments.
(iii) Carpet Area –
This is the floor area of the usable rooms at any floor OR the area where carpet can be laid.