Handrail Requirements for Stairs
Last updated: June 2026
When handrails are required, height limits, and graspability rules.
Detailed explanation
Handrails are required on at least one side of most stairs with more than two risers in dwelling units. The OBC specifies mounting height measured vertically from the nosing line.
Handrails must be continuous for the full length of the stair flight where required, with exceptions at landings and door openings. Graspable cross-section and clearance from walls are also regulated.
Exterior stairs exposed to weather may need materials and fastening suitable for outdoor conditions while still meeting height and graspability requirements.
Ontario Building Code references
Ontario Building Code
Section 9.8.7. — Handrails
Required locations, height, and construction.
Ontario Building Code
Section 9.8.4. — Stairs
General stair safety provisions.
Examples
- A deck stair with four risers needs a handrail on at least one side.
- An interior basement stair with three risers typically requires a handrail.
Common mistakes
- Installing handrails at door-handle height instead of code height from the nosing line.
- Stopping the handrail short of the top or bottom riser.
- Using non-graspable decorative profiles on required handrails.
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