Code Library › Volume 1 › Section 9.5 — Design of Areas, Spaces and Doorways
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.5.1.2.Combination Rooms (See Note A-9.5.1.2.)

(1) Two or more areas may be considered as a combination room if the opening between the areas occupies the larger of 3 m2 or 40% or more of the wall measured on the side of the dependent area. (2) Where the dependent area is a bedroom, direct passage shall be provided between the two areas. (3) The opening required in Sentence (1) shall not contain doors or windows.
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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.