Note: The OBC is typically amended every 5 years. While the “2024” designation reflects the latest amendments and supplementary requirements (often referenced as OBC 2024 or the 2024 edition of Supplementary Standards), the base code remains Ontario Regulation 332/12, as amended. This article reflects the most recent changes effective throughout 2024.
Plumbing, health, and indoor environmental quality
In response to catastrophic flooding in Toronto, Ottawa, and Windsor, the 2024 Code introduces mandatory flood-proofing measures. ontario building code 2024
To prevent sudden disruptions to projects already deep in the design or permitting phases, the Ministry of Municipal Affairs and Housing established a multi-tiered transition window.
A general review by a Professional Engineer is now required for all work — a change that affects foundation and structural modification projects. Additionally, new requirements have been introduced for certain structural aspects of building construction to be designed by professional engineers and architects, aligning with National Construction Codes. Note: The OBC is typically amended every 5 years
: Digital and printed copies of the 2024 Building Code Compendium can be accessed through Publications Ontario .
The , which details the province-specific modifications, deletions, and additions tailored to Ontario's distinct geographic, environmental, and administrative context. For ease of access
For ease of access, these elements are integrated into the 2024 Building Code Compendium , which distributes provisions across two comprehensive volumes. Volume 1 encompasses the Building Code Act, Division A (Compliance, Objectives, and Functional Statements), Division B (Acceptable Solutions), and Division C (Administrative Provisions). Volume 2 provides critical analytical and implementation tools, including Appendix Notes, Supplementary Standards, and compliance forms. The Timeline and Transition Period
Ontario remains committed to the goals of the Accessibility for Ontarians with Disabilities Act (AODA). The 2024 code refines barrier-free design requirements to ensure public and private spaces are universally accessible: