What is the difference between egress and standard windows?

Egress windows are specifically designed and sized to allow emergency escape from below-grade spaces, while standard windows are primarily for light and ventilation. The key difference lies in their minimum size requirements and opening mechanisms mandated by building codes for safety.

Egress Window Requirements under the Ontario Building Code are quite specific. The window must have a minimum opening width of 380mm (15 inches), minimum opening height of 380mm (15 inches), and a minimum net clear opening of 0.35 square meters (3.77 square feet). Equally important, the bottom of the opening cannot be more than 1.5 meters (5 feet) above the floor. These dimensions ensure an average adult can quickly escape through the window during an emergency like a fire or gas leak.

Standard basement windows, in contrast, can be much smaller - those typical 24" x 16" hopper windows you see in many Ottawa basements. While they provide light and some ventilation, they're far too small for emergency escape. Most standard basement windows open inward or have cranks that would be difficult to operate quickly in an emergency situation.

Installation and Cost Considerations in Ottawa vary significantly between the two. Standard window replacement typically runs $300-800 per window, while egress windows cost $2,500-6,000 installed due to the extensive excavation work required. Egress installation involves cutting through the foundation wall, excavating a window well, installing proper drainage, and often requires a building permit from the City of Ottawa. The work must be done carefully to maintain the structural integrity of your foundation - this isn't a DIY project.

When Egress Windows Are Required becomes crucial if you're finishing your basement or creating a secondary suite. Under Ontario Building Code, any bedroom or sleeping area below grade must have an egress window or door leading directly outside. This is non-negotiable for legal basement apartments or ADUs in Ottawa. Even if you're just finishing a basement for family use, bedrooms need egress windows for safety and to meet code requirements.

The window well itself must be properly sized and constructed, typically requiring a minimum area of 0.6 square meters with adequate drainage to prevent water accumulation. In Ottawa's climate, proper waterproofing around the window well is essential to prevent basement flooding during spring melt or heavy rains.

For a free consultation about egress window requirements for your specific basement project, contact Ottawa Basements. We can assess your space and ensure any basement finishing work meets all current Ontario Building Code requirements for safety and legal occupancy.