Built up Area means the covered area at any floor, covered by roof other than cornice, roof, or weather shades permissible. Built up Area of an apartment is the carpet area plus the thickness of the walls.

Super Built up Area or Sale-able area is the built up area plus proportionate area of common areas such as the lobby, passages, lifts shaft & stairs.

Occupancy Certificate or completion certificate is a document which is issued by the local self government authority after completion of the construction of a building . The document is a proof of the construction of the building in compliance with applicable building rules and other laws. The building is assigned a building number only after obtaining the Occupancy certificate . It basically indicates that the building is certified as fit for occupancy, which in turn is a primary document for paying property tax.

Yes you can sell the apartment without registration with the consent of the builder. The builder gives his consent upon clearance of 100% payment or on receiving written confirmation that the balance amount shall be paid by the new buyer.