Ontario's building code amendments document updated to October 2026 version
BUILDING CODE — under the Building Code Act, 1992
Plain-language summary · AI-assisted · not legal advice
The Ontario Amendments to the National Building Code of Canada 2020 have been updated: the reference document date has changed from July 17, 2026 to October 1, 2026, and a new amending regulation has been added to the adoption chain. Together, these form the current Ontario building code. Anyone involved in building design, permitting, or construction should confirm they are working from the October 1, 2026 version of the Ontario Amendments document rather than the earlier July 2026 version. The underlying National Building Code of Canada 2020 (First Printing) base document remains unchanged.
Who this affects: building designers and architects · general contractors · building permit applicants · municipal building departments · construction project managers
Source of truth: O. Reg. 163/24 on the official source · consolidated version 10 → 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.
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