What is an egress window?

An egress window is a building code requirement for emergency exits from bedrooms and other habitable spaces. When converting a garage to living space in Ontario, the Building Code mandates that any room used for sleeping must have at least one egress window that allows occupants to exit safely without using stairs or primary doors.

The window must meet specific size requirements: a minimum clear opening of 20 inches wide by 24 inches tall, with a total glass area of at least 5.7 square feet. These measurements ensure an average adult can pass through quickly during an emergency. The sill (bottom of the window) must sit no higher than 44 inches above the floor, making the opening accessible to people of varying abilities and ages.

Egress windows are particularly important in garage conversions because bedrooms created from these spaces typically lack alternative emergency exits. If a fire or other emergency blocks the main doorway, an egress window provides a life-saving secondary route. The window must open freely and should not be blocked by bars, grilles, or other obstructions that would prevent escape.

Inspectors verify egress compliance before issuing occupancy permits. Failing to install code-compliant egress windows can result in a space being classified as uninhabitable, preventing legal occupancy and affecting resale value. Builders converting garages into bedrooms or recreational rooms must account for egress window placement during design and construction. For help finding qualified contractors, consult garage additions and conversions providers in your area.