Plumbing, health, and indoor environmental quality
Case Example (Illustrative) A new six-storey mixed-use residential building under OBC 2024: requires enhanced thermal envelope, blower-door testing target of 2.0 ACH50, mandatory HRV with zoned controls, sprinklering to the second and above floors, and restriction on combustible cladding materials above the second storey. Early energy modelling optimized window-to-wall ratio to meet performance path, and modular bathroom pods allowed faster onsite assembly under the Code’s off-site construction provisions.
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. ontario building code 2024
4.3 Structural and Durability Provisions
The 2024 Building Code Compendium (two-volume set) is available in both digital and print versions through Publications Ontario. The most recent version as of publication is January 16, 2025. Professionals can subscribe to , the ministry's email subscription service, for up-to-date information on code changes and compendium updates. The represents the most sweeping overhaul of Ontario’s
The represents the most sweeping overhaul of Ontario’s construction regulations in over a decade. Officially filed under O. Reg. 163/24 , the new code came into effect on January 1, 2025 , effectively replacing the long-standing 2012 edition.
The represents the most significant update to provincial construction regulations in decades. Effectively January 1, 2025 , the new code streamlines more than 1,730 technical variations to align Ontario with the 2020 National Building Code of Canada (NBC) . Implementation and Transition Timeline updated tactile walking surface indicators
The technical changes span across all divisions of the code, with heavy emphasis on safety, housing density, and material innovation. 1. Mass Timber and Tall Wood Construction
: Expanded mandates for automatic doors at main entrances and universal washrooms.
The 2024 code continues Ontario’s march toward full accessibility under the Accessibility for Ontarians with Disabilities Act (AODA). Updates include refined dimensions for turn-radii in public washrooms, updated tactile walking surface indicators, and clearer paths of travel in commercial spaces. Implementation Timeline and Transition Period
Context and Objectives