For residential building the liveable area known as carpet area should be 50 to 70% of the plinth area.

Type of Building
Floor area per head Sq.m.
Cubic spaces per head sq.m.
Verandah Area percent
Area occupied by wall percent
Residential
2.5 to 3.0
9
10 to 20
15 to 20
School
1.0 to 2.0
4.2
10 to 20
15 to 20
Hostel
7.0 to 10.0
30
25 to 35
15 to 20
Hospital
8.0 to 10.0
30
25 to 35
15 to 20
Factory
2.5 to 3.0
9 to 12
25 to 35
10
Office Building
2.5 to 3.0
12 to 15
25 to 35
10