| Primary value | 7.5 m² |
| Applies to | Second bedroom in 2BHK · Children's bedrooms · Study rooms |
| Exceptions | Minimum width → 2.1 m |
| First habitable room (single) → 9.5 m² | |
| Measured as | Carpet area inside walls — excludes wardrobes, balconies, and projecting features. |
| Source | NBC 2016 — Part 4, Clause 5.4.2 ✓ Verified |
When a unit has multiple bedrooms, NBC allows the secondary rooms to be smaller (7.5 m² vs 9.5 m²) on the assumption that occupants share other spaces (living, dining). The 2.1 m width prevents corridors-disguised-as-bedrooms.
Children's bedrooms in compact 2/3BHK units often hit the 7.5 m² floor. Premium housing typically provides 10–12 m² for secondary bedrooms.