PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code
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9.5.5.1.Doorway Opening Sizes
(1) Except as provided in Sentence (2) and Articles 9.5.5.3., 9.9.6.2. and 9.9.6.3., doorway openings within dwelling
units and within houses with a secondary suite including their common spaces shall be designed to accommodate at least
the door sizes given in Table 9.5.5.1. for swing-type and folding doors.
(2) Doorway openings within secondary suites shall be designed to accommodate swing-type and folding doors not less
than 1 890 mm high where the ceiling height complies with Sentence 9.5.3.1.(2).
Table 9.5.5.1.
Minimum Door Sizes
Forming Part of Sentence 9.5.5.1.(1)
At Entrance to: Minimum Width, mm Minimum Height, mm
Dwelling unit or house with a secondary suite including common spaces
(required entrance) 810 1 980
Vestibule or entrance hall
Stairs to a floor level that contains a finished space
All doors in at least one line of passage from the exterior to the basement 810 1 980
Utility rooms
Walk-in closet 610 1 980
Bathroom, water-closet room, shower room(1) 610 1 980
Rooms located off hallways that are permitted to be 710 mm wide 610 1 980
Rooms not mentioned above, exterior balconies 760 1 980
Notes to Table 9.5.5.1.:
(1) See Article 9.5.5.3.
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.