Code Library › Volume 1 › Section 9.15 — Footings and Foundations
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.15.4.6.Extension Above Ground Level

(1) Exterior foundation walls shall extend not less than 150 mm above finished ground level.
← Previous9.15.4.5. Reinforcement for Flat Insulating Concrete Form Next →9.15.4.7. Reduction in Thickness

Common questions about this part of the code

What is the minimum footing size for a house in Ontario?How thick does a foundation wall need to be in Ontario?How deep do foundations have to be for frost protection in Ontario?

Understand this provision in seconds

BUILDAiD Assist explains any article of the building code in plain English — with exact citations, exceptions and related requirements.

Try BUILDAiD Beta

Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.