| Primary value | 0.75 - 0.90 m |
| Applies to | Bedroom windows · Living room windows · Kitchen windows |
| Exceptions | Bathroom high-level windows → 1.80 m+ |
| Floor-to-ceiling glazing → 0 m | |
| Measured as | From the FFL to the top of the window sill (the bottom of the glazed opening). |
| Source | NBC 2016 — Part 4, Clause 4.3 ⚠ Clause pending verification |
Sill height balances safety (preventing children from falling out), privacy (eye-level for someone inside, blocked from outside), and outward views from a seated position. 0.75-0.90 m is the comfort range that most rooms use.
Bedroom and living room sills typically run 0.75-0.85 m. Kitchen sills sit at 1.0-1.2 m to clear counter heights. Bathroom windows are 1.8 m+ for privacy.