The 2024 OBC significantly expands the permissions for "mass timber" construction. Following global trends and extensive fire safety testing, the code permits encapsulated mass timber construction (EMTC) for buildings up to (previously limited to 6 under specific conditions, or 18 storeys under an alternate compliance path in the 2022 amendments).

Marking the largest revision since 2012, the 2024 Ontario Building Code (OBC) fundamentally changes how buildings are designed and constructed across the province. Officially filed on under Ontario Regulation 163/24, this version advances harmonization with national standards, introduces expansive sustainable building technologies, and significantly strengthens accessibility, housing, and environmental safety requirements. As these changes impact everything from single-family homes to high-rise towers, understanding them is critical for industry professionals and property owners alike.

Broadened mandates for roughing-in electrical infrastructure to support future Electric Vehicle (EV) charging stations in residential parking spaces. 4. Barrier-Free Accessibility

Designers must adapt to a completely new numbering system and structural layout. Standard architectural details—especially regarding building envelopes, mass timber connections, and fire separations—must be audited and updated to match the harmonized code. For Homebuilders and Contractors

One of the most innovative and forward-looking changes in the 2024 OBC expands the use of engineered wood products in tall building construction.

2024 Ontario Building Code (OBC) came into effect on January 1, 2025

: Provides additional supplementary standards and appendix notes. Technical Bulletins

The (OBC 2024) is a comprehensive regulatory update under the Building Code Act, 1992 . Officially adopted in late 2024 with phased implementation beginning January 1, 2025 , this new code represents the first major overhaul of Ontario’s building regulations since 2012 (Supplementary Standard SB-12 updates aside). The code aims to accelerate housing construction, reduce regulatory burden, improve energy efficiency, and align with national model codes (NBC 2020) while retaining provincial distinctions.

Identify projects scheduled for building permit submission late in the year and verify if they qualify for the 2012 OBC transition rules or must be adapted to the 2024 standards. Conclusion

Operating under the old code is not a minor infraction.

Updated tactile warning indicators and visual signage rules for public spaces. 3. Energy Efficiency and Environmental Sustainability