2024 | Ontario Building Code

The Ontario Building Code (OBC) is the regulatory bible for construction in Canada’s most populous province. It dictates how buildings are designed, constructed, renovated, and demolished. As of 2024, Ontario is undergoing a significant regulatory shift, moving toward a more harmonized system with the National Building Code while also introducing stringent energy efficiency and accessibility requirements.

“My contractor knows the code – I don’t need to read it.” Fact: Many contractors are unaware of the stair tread and CO alarm changes. Always verify. ontario building code 2024

“Small buildings (sheds, garages) are exempt.” Fact: Detached garages under 10 sq.m. (108 sq.ft.) are exempt, but any garage with heating or a door connected to the house triggers CO alarm requirements. The Ontario Building Code (OBC) is the regulatory

For builders, architects, engineers, developers, and homeowners undertaking a major renovation, understanding the is not just a legal obligation—it is the cornerstone of a safe, durable, and lawful project. “My contractor knows the code – I don’t