MarkhamBuilding InspectionsInspections

Uniform Risers And Treads

Published by City of Markham

This is the City of Markham’s document, as published on its website on 18 October 2026. The municipality may have changed it since: check the current version at the source. Legal notice

Type: Guide
Published by: City of Markham
Date: January 1, 2025
Also called: Uniform Risers and Treads
For: builder
Building types: All building types
Pages: 3

Overview

Markham's Builder Tip No. 54, from the City's Building Standards Department, dated January 1, 2025 and updated to the 2024 OBC, on stair dimensions in dwelling units, one of the City's housing tips under the 2024 Ontario Building Code. It quotes Articles 9.8.4.4., 9.8.4.1., 9.8.4.2. and 9.8.4.3. on riser and tread tolerances of 5 mm and 10 mm, risers at sloping garage floors and driveways, and tapered treads, and its objective names the four tread types, rectangular, tapered, winders and spiral, with the 255 mm to 355 mm run.

What it covers

9.8.4.4. Uniformity and Tolerances for Risers and Treads
9.8.4.1. Dimensions for Risers
9.8.4.2. Dimensions for Rectangular Treads
9.8.4.3. Dimensions for Tapered Treads
Objective

Check this against the municipality before you rely on it.

DocHub collects what a municipality published; it cannot tell you what is in force today. A newer version may exist, may be titled differently, or may not be posted publicly at all.