On April 10, Ontario announced its latest Building Code, effective January 1, 2025. The new code aims to reduce regulatory burdens on the construction industry while maintaining high standards of performance and safety in new and renovated buildings.
Significant changes include alignment with the National Construction Codes, eliminating over 1,730 technical variations between provincial and national requirements. At MW Drafting & Design, we are actively evaluating the implications of these changes for our profession.
Key dates for the transition:
Until March 31, 2025: Applications with substantially complete working drawings initiated before 2025 can still follow the previous code.
After April 1, 2025: All permit applications must adhere to the 2024 Ontario Building Code.
Highlights of the 2024 Ontario Building Code:
Harmonization with the National Building Code provisions for secondary suites in two-unit houses.
New regulations for Large Farm Buildings.
Mitigation measures for radon effects.
Updates to fire protection system standards.
Revisions to standards for prefabricated septic tanks and sewage holding tanks.
Additionally, updates to the Environmental Assessment Act and Conservation Authorities Act are now in effect. These include:
Changes to laws regarding designated projects under the Environmental Assessment Act.
Updated permits issued by conservation authorities and the Minister of Natural Resources and Forestry under the Conservation Authorities Act.