PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code
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9.9.10.1.Egress Windows or Doors for Bedrooms
(1) Except where a door on the same floor level as the bedroom provides direct access to the exterior, every floor level
containing a bedroom in a suite shall be provided with at least one outside window that
(a) is openable from the inside without the use of tools,
(b) provides an individual, unobstructed open portion having a minimum area of 0.35 m² with no dimension less than
380 mm, and
(c) maintains the required opening described in Clause (b) without the need for additional support.
(See Note A-9.9.10.1.(1))
(2) Except for basement areas, the window required in Sentence (1) shall have a maximum sill height of 1 000 mm
above the floor. (See Note A-9.9.10.1.(2))
(3) Where a window required in Sentence (1) opens into a window well, a clearance of not less than 550 mm shall be
provided in front of the window. (See Note A-9.9.10.1.(3))
(4) Where the sash of a window referred to in Sentence (3) swings towards the window well, the operation of the sash
shall not reduce the clearance in a manner that would restrict escape in an emergency.
(5) Where a protective enclosure is installed over the window well referred to in Sentence (3), the enclosure shall be
openable from the inside without the use of keys, tools or special knowledge of the opening mechanism.
(6) When sliding windows are used, the minimum dimension described in Sentence (1) shall apply to the openable
portion of the window.
(7) Where the sleeping area within a live/work unit is on a mezzanine with no obstructions more than 1 070 mm above
the floor, the window required in Sentence (1) may be provided on the main level of the live/work unit provided the
mezzanine is not more than 25% of the area of the live/work unit or 20 m2, whichever is less, and an unobstructed direct
path of travel is provided from the mezzanine to this window.
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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.