PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code
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9.10.18.2.Fire Alarm System Required
(1) Reserved.
(2) Except as provided in Sentence (5), a fire alarm system shall be installed
(a) in every building that contains more than 3 storeys, including storeys below the first storey,
(b) where the total occupant load exceeds 300, or
(c) when the occupant load for any major occupancy in Table 9.10.18.2. is exceeded.
(3) Reserved.
(4) Reserved.
(5) A fire alarm system is not required in a residential occupancy where an exit or public corridor serves not more than
4 suites or where each suite has direct access to an exterior exit facility leading to ground level.
Table 9.10.18.2.
Maximum Occupant Load for Buildings Without Fire Alarm Systems
Forming Part of Sentence 9.10.18.2.(2)
Major Occupancy Classification Occupant Load Above which Fire Alarm System is Required
Residential 10 (sleeping accommodation)
Business and personal services, mercantile 150 above or below the first storey
Low- or medium-hazard industrial 75 above or below the first storey
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
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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.