Ontario Building Code — 2024

Building on previous pilot programs, the 2024 code expands permissions for mass timber buildings, allowing them to be constructed up to 12 stories high under specific fire-safety conditions.

Several important safety changes affect stairs and guardrails: ontario building code 2024

The 2024 OBC introduces the concept of a for houses with secondary suites. These barriers are required between dwelling units and must be constructed with 15.9mm Type X gypsum board . The scope for fire separations has also been expanded in homes containing secondary suites. Building on previous pilot programs, the 2024 code

: As of April 1, 2025, every new house and addition must include a radon control rough-in to allow for future mitigation if gas is detected. The scope for fire separations has also been

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The 2024 OBC updates barrier-free design standards to better match the Accessibility for Ontarians with Disabilities Act (AODA). Notable adjustments include: