| Primary value | 2.0 m |
| Applies to | All internal doors · External doors · Bathroom and WC doors |
| Exceptions | Storage / cupboard doors → (no minimum) |
| Measured as | Vertical clear opening from FFL to the top of the frame. |
| Source | NBC 2016 — Part 4, Clause 4.2 ✓ Verified |
2.0 m ensures any adult can pass without ducking. Below this, even average-height users hit the frame, which is annoying and degrades the perceived quality of the building.
Most Indian doors are 2.0–2.1 m. Premium projects use 2.4–2.7 m doors for a sense of height and grandness.