Ontario building code updated with a new round of provincial amendments to the 2020 National Building Code
BUILDING CODE — under the Building Code Act, 1992
Plain-language summary · AI-assisted · not legal advice
Ontario has adopted a revised set of provincial amendments to the National Building Code of Canada 2020. The amendment document referenced in the regulation has been updated to a newer dated version, replacing the previous April 2026 document. Anyone applying for a building permit or designing construction to comply with the Ontario Building Code should ensure they are referencing the latest version of the Ontario Amendments to the National Building Code of Canada 2020. The transition rules for projects with permits issued on or before December 31, 2024 remain unchanged.
Who this affects: building permit applicants · architects and structural engineers · general contractors and builders · building officials and inspectors · developers and property owners
Source of truth: O. Reg. 163/24 on ontario.ca · consolidated version 9 → 0
Legislative text © King's Printer for Ontario. This page is not an official version of the law and is not legal advice. Verify against the official source before acting.
Get changes like this in your inbox, every Friday.