Egress windows in Gatineau and Ottawa

A product’s nominal size, glass area and actual escape opening are different measurements. The frame, window style and operating mechanism affect the available space. Check the manufacturer’s clear-opening specifications and the installed configuration before ordering. A correctly sized window does not, by itself, make a bedroom or dwelling compliant.

The Québec-amended 2020 NBC generally calls for an openable exterior window or an exterior door in each bedroom, with exceptions including sprinkler protection or direct exterior egress serving the floor area. Where a window is required, the benchmarks are a clear opening of at least 0.35 m², no dimension below 380 mm, and at least 760 mm of clearance in front of the window within a well. Operation and access must allow escape.

• QC 2020 modifié, division B, art. 9.9.10.1, volume 2 p. 9-47

Municipal verification remains essential. Municipal rules determine the applicable edition for some small residential buildings, and alterations to existing buildings may have specific requirements. For projects governed by Québec’s provincial Building chapter, transitional provisions allow the earlier text for work starting before October 17, 2027, subject to the regulation’s conditions. This is not a blanket renovation exemption.

• Gouvernement du Québec, Règlement de construction
• RBQ, avis du 26 août 2026

Under Article 9.9.10.1 of the 2024 Code, each floor level containing a bedroom within a suite needs at least one qualifying exterior window, unless a door on that level leads directly outdoors. This is not a general requirement for an egress window in every bedroom. Benchmarks are 0.35 m² of clear opening, no dimension below 380 mm, and 550 mm in front of the window within a well; the sash must not obstruct escape.

• Ontario 2024 Building Code, Part 9, Article 9.9.10.1

The 2024 Code took effect January 1, 2025. Renovations require a review of the existing-building provisions, including Part 11 where applicable. Creating a bedroom or an additional dwelling involves more than replacing a window.

• Ontario 2024 Building Code, Preface
• Ontario 2024 Building Code, Division A, Part 1, 1.3.3.3B–C

Our assessment considers the clear opening, operating direction, access from inside and space outside. Basement projects also require attention to the well, any cover, drainage, weatherproofing and any foundation cutting or structural alteration. Required drawings, professional involvement and approvals depend on the project. Keep the escape route clear of stored items, snow and landscaping obstructions.