MarkhamBuilding InspectionsInspections
Dimensions For Runs And Rectangular Treads - Housing
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
- Dimensions for Runs and Rectangular Treads - Housing
- For
- builder
- Building types
- All building types
- Pages
- 3
Overview
Markham's Builder Tip No. 106, dated January 1, 2025, on stair tread run in houses, filed with the City's housing tips under the 2024 Ontario Building Code. It quotes Article 9.8.3.1. on straight and curved runs and Article 9.8.4.2. on rectangular treads. Its objective explains the change from a 210 mm to a 255 mm minimum run for permits from January 1, 2022, stair-fall figures from the National Research Council, the definition of flight, and an extract of Table 9.8.4.1. for private stairs.
What it covers
- 9.8.3.1. Straight and Curved Runs in Stairs
- 9.8.4.2. Dimensions for Rectangular Treads
- Objective
- Applicable Requirements from Table 9.8.4.1.
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