Carpet Area is the total usable area inside the house that can be covered by Carpet. The carpet area excludes the balcony and other utility areas but does include the area covered by internal walls.
Built-up Area is the sum of carpet area plus the area covered by the balcony, terrace, and other utility as well.
The Super built-up area is the total sum of the built-up area and space occupied by common areas like lobby, staircase, elevator, shafts, clubhouse. This is often referred to as a saleable area.