Egress Windows for Ottawa Basements: Requirements and Costs

Why Egress Windows Are Required

Egress windows serve two critical purposes:

Emergency escape: If fire or emergency blocks interior stairs, occupants need another way out.

Rescue access: Firefighters need to be able to enter through the window to rescue occupants.

Legal requirements: - Any basement bedroom MUST have an egress window - Without one, it's not a legal bedroom - Insurance may not cover incidents in non-compliant spaces - Selling becomes complicated — home inspectors flag this

When egress is required: - Basement bedrooms - Basement apartments - Any sleeping area below grade

Ottawa Egress Window Requirements

Minimum dimensions per Ontario Building Code:

Opening size requirements: - Minimum area: 0.35 m² (3.77 sq ft) - Minimum height: 380 mm (15 inches) - Minimum width: 380 mm (15 inches) - Maximum sill height: 1,500 mm (59 inches) from floor

In plain terms: The window opening must be at least 15" x 15" and have a total opening area of 3.77 sq ft or more.

Common mistake: Measuring the glass, not the opening. The OPENING must meet these minimums — the frame takes up some space.

Typical egress window sizes: - 44" x 36" casement: Opens to ~6 sq ft — meets code easily - 32" x 30" slider: Opens to ~3.3 sq ft — does NOT meet code - 48" x 24" awning: Opens to ~4 sq ft — barely meets code

Window Well Requirements

If the window is below grade, you need a window well:

Minimum dimensions: - Width: At least as wide as the window - Projection from wall: At least 36" (915 mm) from window - Area: At least 0.55 m² (6 sq ft)

Additional requirements: - Must allow the window to fully open - Steps or ladder required if well is deeper than 44" - Well must drain — either to weeping tile or sump - Cover optional but must be easily removable from inside

Materials: Galvanized steel, plastic, or concrete block. Steel is most common and economical.

Installation Process and Costs

What's involved in adding an egress window:

Typical project steps: 1. Excavate outside foundation 2. Cut through foundation wall 3. Install steel lintel to support above 4. Install window frame 5. Install window well 6. Connect drainage 7. Backfill and grade 8. Interior finishing

Costs in Ottawa: - Basic egress window installation: $2,500 - $4,000 - With window well: $3,000 - $5,000 - Deep wells (requiring steps): $4,000 - $6,000 - Premium window or finishes: Add $500 - $1,500

Permit required: Yes, always. Cost $100-$300.

Timeline: 2-3 days for installation once window arrives.

Choosing the Right Egress Window

Options to consider:

Window types that work: - Casement: Opens fully, easy escape — most popular - Sliding: Must open to full minimum area - Awning: Works if large enough - In-swing: Opens into room, good for large wells

Window types that usually DON'T work: - Standard double-hung (opening too small) - Small sliders - Fixed/picture windows (don't open)

Our recommendations: - Casement windows are easiest to escape through - Size up when possible — minimum legal isn't ideal for actual emergency - Vinyl or fibreglass for low maintenance in below-grade environment - Triple-pane for efficiency (basement windows are cold)

Added features to consider: - Built-in blinds (basement windows benefit from privacy) - Low-E coating (helps with temperature) - Clear window well cover (keeps debris and animals out)