Window Sill Height Calculator
Find the minimum window sill height requirement by room type according to building codes.
How to Use the Sill Height Calculator
- Select the room type.
- Click Calculate to see the minimum sill height and relevant code reference.
Use Cases
- •Residential building permit preparation.
- •Window replacement planning.
- •Safety glazing compliance.
- •Building inspection preparation.
Formula
Minimum sill heights are code-based: Bedroom ≥900 mm, Bathroom ≥1500 mm, Kitchen ≥900 mm, Living ≥600 mm.
Frequently Asked Questions
Why do bathrooms have higher sill heights?
Bathroom windows require higher sills (1500 mm) for privacy and to prevent hazardous glass at low levels.
Is this IRC or IBC?
Values are based on IRC (International Residential Code). Local codes may differ slightly.
What if my window is lower?
Windows below minimum sill height typically require safety glazing (tempered or laminated glass).