How much do contractors charge for dormer addition in New Brunswick?

Dormer additions in New Brunswick typically run $15,000–$60,000+, depending heavily on the dormer type, size, and whether you're adding living space or just improving light and ventilation.

Here's how the pricing breaks down across the province:

• Shed dormer (single sloped roof, often spans most of the roofline): $25,000–$60,000+ — the most expensive but adds the most usable headroom
• Gable dormer (peaked roof, classic look): $15,000–$35,000 — most common on older NB homes
• Hip dormer: $20,000–$40,000
• Eyebrow/barrel dormer: $20,000–$45,000 — more complex framing, less common

These ranges reflect the New Brunswick market, which runs roughly 20–30% below major urban centres like Toronto or Vancouver. That said, if you're in northern NB (Edmundston, Campbellton, Bathurst area), skilled framing and roofing contractors can be harder to book — labour shortages in those regions can push both price and timelines up.

What drives the cost up or down more than anything else is what's happening inside. A dormer that simply adds a window to an unfinished attic is a very different project than one that creates a finished bedroom with insulation, drywall, electrical, and egress. Finished living space adds $8,000–$20,000 on top of the structural work alone. Roofing material choice matters too — asphalt shingles are the NB standard and most affordable; metal roofing on the dormer face costs more upfront but handles NB's freeze-thaw cycles and heavy snowfall better long-term.

Permits are non-negotiable here. A dormer is a structural modification to your roof system, so a building permit is required. If you're in Moncton, Fredericton, Saint John, or another incorporated municipality, apply through your city's planning and development office. If you're in a rural or unincorporated area, your Regional Service Commission (RSC) handles it — for example, RSC 11 covers the Capital Region rural areas, RSC 7 covers rural southeast NB near Shediac, and RSC 9 covers the Fundy/Grand Bay-Westfield area. Permit fees are typically $500–$1,500 depending on the project value.

Under the National Building Code of Canada 2020 (now in effect in NB as of May 1, 2025), any new attic living space must meet Tier 2 energy efficiency requirements — meaning proper air sealing and higher insulation values than older NB homes were built to. For a dormer creating a finished bedroom, you'll also need an egress window (minimum 0.35m² clear opening, at least 380mm in any direction) and interconnected smoke alarms. If electrical work is involved — and it almost certainly will be — that requires a licensed electrical contractor, a wiring permit through NB Power (1-800-615-0522), and a final inspection by Technical Inspection Services (TIS) at 1-888-659-3222.

One thing NB homeowners often overlook is the structural assessment before pricing. Many attic floor joists in homes built before the 1990s weren't designed for live loads — if you're converting attic space to a bedroom, a structural engineer may need to confirm the floor system can handle it. Budget $800–$1,500 for that assessment; it's money well spent before a contractor starts cutting into your roof.

Get at least three quotes and ask each contractor specifically what's included — framing, roofing, insulation, drywall, electrical rough-in, and finishing are sometimes quoted separately. You can find experienced local contractors through the New Brunswick Construction Network directory to compare options in your area.