Ontario Building Code 2024 — [exclusive]

2024 Ontario Building Code (OBC) was filed on April 10, 2024, and came into effect on January 1, 2025 . It consists of the 2020 National Building Code of Canada combined with the

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. ontario building code 2024

Operating under the old code is not a minor infraction. 2024 Ontario Building Code (OBC) was filed on

: Every new building permit application must strictly adhere to the 2024 OBC. March 30, 2026 : All provincial Building Code Exams This article reflects the most recent changes effective

The 2024 edition of the Ontario Building Code (OBC) represents a pivotal shift in the province’s approach to construction regulation, public safety, and environmental stewardship. Scheduled to come into effect in early 2025, the 2024 OBC harmonizes Ontario’s regulations with the National Construction Codes while introducing aggressive measures to combat climate change and address the housing affordability crisis. This paper examines the key structural, technical, and administrative changes within the new code. Specifically, it analyzes the implementation of tiered energy efficiency standards aimed at net-zero readiness, the introduction of "mass timber" provisions for tall buildings, and the regulatory pathways for Additional Residential Units (ARUs). The analysis suggests that while the 2024 OBC presents initial cost and training challenges for the industry, it provides a necessary regulatory framework for a resilient, low-carbon future.

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