Ontario Prepares to Adopt an Updated Building Code Edition

Ontario has been working through the process of updating its provincial building code to a new edition based on the 2020 national model codes, following the pattern every province goes through after a national code cycle — review, provincial amendment, and a formal adoption date. Industry consultation on the proposed changes has been ongoing, with builders and designers getting a preview period before the new edition becomes enforceable.

For anyone with a project spanning the transition, timing matters: permits are typically reviewed against the code edition in force on the date of application, not the date construction actually starts, so a project submitted just before the changeover can end up governed by the outgoing edition even if most of the building happens after the new one takes effect.