Carpet Area is the area enclosed within the walls, actual area to lay the carpet. This area does not include the thickness of the inner walls. It is the actual used area of an apartment/office unit/showroom etc.
Built up Area is the carpet area plus the thickness of outer walls and the balcony.
Super Built Up Area is the built up area plus proportionate area of common areas such as the 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, swimming pool, garden, clubhouse, etc. This term is therefore only applicable in the case of multi-dwelling units.
This break up is extremely essential as builders can place anywhere from 65% to 85% per cent of the super built area as carpet area. That means, if the price is quoted as 1,000 sq ft super built up area, the carpet area could be anywhere from just 650 sq ft to 850 sq ft. If this break up is not mentioned in the agreement, demand that the vendor/ builder mention it in the sale deed.
Yes. It is important to inspect the property, probably this is the largest single investment you will ever make. You should know all the details of the property and need for any major repairs / modifications before you buy. You can crosscheck the commitment made by builder and actual implementation. A close inspection points out the positive aspects of the property, as well as the maintenance that will be necessary to keep it in good shape. After the inspection, you will have a much clearer understanding of the property you are about to purchase.