Ans. The carpet area is the area enclosed within the walls, the actual area to lay the carpet. This area does not include the thickness of the inner walls, the actual used area of an apartment/office unit/showroom, etc. The built-up area is the carpet area plus the width of the outer walls and the balcony. Super Built-Up Area is the built-up area plus a proportionate area of common areas such as lobby, lifts, shaft, stairs, etc. The Plinth area, along with a share of all common areas proportionately divided amongst all unit owners, makes up the Super Built-up area. Sometimes it may also include the common areas such as swimming pool, garden, clubhouse, etc. This term is, therefore, only applicable in the case of multi-dwelling units.