How much does it cost to add egress windows and bring a basement bedroom up to code in Saint John?

Adding an egress window to a basement bedroom in Saint John typically costs $2,500 to $5,000 per window, and bringing the full bedroom up to NB Building Code standards — including electrical, smoke detection, and finishing — generally runs $8,000 to $18,000 total depending on the current state of the space. This is a life-safety requirement, not an optional upgrade. Every basement bedroom must have a code-compliant egress window, and there are no exceptions.

The NB Building Code requires each basement bedroom egress window to have a minimum clear opening of 3.8 square feet (0.35 m²), with a maximum sill height of 1,500mm from the finished floor. The window must open without tools or special knowledge — this is your emergency escape route in a fire. Because the window is below grade in most basements, a window well is required outside, and it must have proper drainage to prevent water pooling. In Saint John specifically, with its heavy clay soils that hold water against foundations, the window well drainage is critical. A poorly drained window well in Saint John clay becomes a water entry point during every rainstorm and spring thaw.

The egress window installation itself involves several steps that drive the cost. The contractor must cut through the concrete foundation wall using a concrete saw — this is structural work that requires a building permit in Saint John. The opening must be properly sized and reinforced with a steel lintel above to maintain structural integrity. The window well is then excavated outside, lined (usually with a galvanized steel or polyethylene well), backfilled with drainage gravel, and connected to a drain that either ties into the weeping tile system or drains to daylight. The window unit itself is installed and sealed with waterproofing membrane on the exterior. In Saint John's clay soils, the excavation and drainage work tends to push costs toward the higher end of the range because the clay does not drain naturally and requires more robust gravel and drainage provisions.

Full Bedroom Code Compliance Costs

Beyond the egress window, bringing a basement bedroom up to code in Saint John includes several other requirements. Electrical needs include AFCI-protected circuits for the bedroom, GFCI protection on all basement outlets, adequate lighting, and proper outlet spacing — rough-in electrical for a bedroom runs $1,000 to $2,500. Smoke detectors are required in every bedroom and in the hallway outside bedrooms, and carbon monoxide detectors are required near sleeping areas — add $200 to $500 for hardwired, interconnected units. Insulation against the foundation walls must meet a minimum R-12.5, using rigid foam board or closed-cell spray foam (never fiberglass batts against the concrete in Saint John's damp conditions) — insulating one bedroom's worth of wall space runs $1,500 to $3,500. Framing and drywall for the bedroom adds $2,000 to $5,000, and flooring with a Dricore subfloor system adds $1,500 to $3,000.

Saint John's building inspection department handles permits directly and typically processes applications within one to three weeks, with fees ranging from $75 to $300. You will need framing, rough-in electrical, insulation, and final inspections. Do not skip this process — unpermitted bedrooms create liability issues, insurance problems, and complications when selling the home.

Because this work involves cutting the foundation, structural reinforcement, electrical, and waterproofing, this is firmly in the hire-a-professional category. Get at least three quotes from contractors experienced with egress window installations in Saint John.

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Looking for experienced contractors? The New Brunswick Construction Network connects homeowners with qualified professionals:

• Thirty Four Renovations
• Gionetterenovations