Code Library › Volume 1 › Section 3.2 — Building Fire Safety
PART 3 — FIRE PROTECTION, OCCUPANT SAFETY AND ACCESSIBILITYUpdated for the 2024 Ontario Building Code

3.2.2.28.Group A, Division 2, One Storey

(1) A building classified as Group A, Division 2 is permitted to be of combustible construction or noncombustible construction used singly or in combination, provided (a) it is not more than 1 storey in building height, and (b) except as permitted by Sentence (2), it has a building area not more than (i) 400 m2 if facing one street, (ii) 500 m2 if facing 2 streets, or (iii) 600 m2 if facing 3 streets. (2) In a building referred to in Sentence (1) without a basement, the building area limits of Sentence (1) are permitted to be doubled provided a fire separation with a fire-resistance rating not less than 1 h is used to separate the building into fire compartments, each one of which does not exceed the area limits of Clause (1)(b).
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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.