Stairs

What handrail is required on stairs in Ontario?

Last updated: June 2026

Short answer: Handrails are required on at least one side of stairs with more than two risers, at a specified height measured from the nosing line, and must be graspable along the run.

Detailed explanation

Part 9 requires handrails on stairs in dwelling units where the flight has more than two risers. Height is measured vertically from the line connecting nosings.

Handrails should be continuous through the flight except where interrupted by a landing or doorway. Clearance from walls and cross-section shape affect graspability.

Exterior stairs need materials and fasteners suitable for weather while meeting the same dimensional rules.

Relevant OBC sections

Ontario Building Code
Section 9.8.7. — Handrails
Ontario Building Code
Section 9.8.4. — Stairs

Example scenario

Your deck has three steps to the yard. You add a 2×6 cap on the guard but no graspable handrail on the open side — inspection fails because a handrail is required.

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