Ontario Building Code 2024 Jun 2026

Ontario retains stricter radon requirements and less aggressive mass timber provisions due to insurance and industry readiness concerns.

: Could still use the 2012 OBC if plans were substantially completed by December 31, 2024. City of Kingston Major Technical Changes ontario building code 2024

To directly combat the housing shortage, the 2024 OBC includes regulatory relaxations for Additional Residential Units (ARUs), often referred to as laneway suites or garden suites. A three-month grace period allowed applicants to use

A three-month grace period allowed applicants to use the 2012 OBC for projects where working drawings were substantially complete by December 31, 2024. 2025 . However

The 2024 Code comes into effect on January 1, 2025 . However, there is a transition period allowing for the use of the 2012 Code for projects where a permit application is submitted before a specific deadline (usually the end of the transition period), provided construction begins within a set timeframe.