How much should I budget for basement suite conversion in New Brunswick?

A basement suite conversion in New Brunswick typically costs $35,000-$85,000 depending on the scope and existing conditions, with most homeowners spending around $55,000-$65,000 for a complete legal suite.

The wide range reflects what you're starting with and what needs to be added. If your basement already has decent ceiling height, some framing, and basic electrical, you'll be on the lower end. Starting from an unfinished basement with moisture issues, low ceilings, or outdated systems pushes costs significantly higher.

Key cost factors include:

• Ceiling height compliance — NBC requires minimum 1.95m (6'5") for habitable rooms. If you're under this, lowering the floor or structural modifications can add $8,000-$15,000+


• Separate entrance — Exterior entrance with proper stairs and landing: $4,000-$8,000. Interior entrance with fire-rated separation: $2,000-$4,000


• Electrical upgrade — Separate panel and circuits for the suite: $3,500-$6,000. Must be done by licensed electrician with NB Power wiring permit


• Plumbing rough-in — Full bathroom and kitchen hookups: $6,000-$12,000. Licensed plumber and TIS permit required


• Egress windows — Bedroom windows meeting NBC escape requirements: $1,500-$3,000 per window including cutting and waterproofing


• Fire separation — 45-minute fire-rated ceiling/walls between units: $3,000-$6,000


• Moisture control — Proper vapor barrier, insulation, and drainage: $4,000-$8,000

What's typically included in full conversion costs:

• Framing and drywall


• Flooring (luxury vinyl plank is popular — waterproof and durable)


• Basic kitchen with appliances


• Full bathroom


• Electrical and plumbing rough-in


• Fire safety systems (interconnected smoke/CO alarms)


• Permits and inspections

Critical first step: Contact your municipality or Regional Service Commission to confirm zoning allows secondary suites. Rules vary significantly — Fredericton and Moncton generally permit them in residential zones, but rural areas under RSC jurisdiction have different requirements. Saint John's rules vary by neighborhood. You'll need a building permit regardless, and the project must meet NBC 2020 standards.

Professional guidance: This isn't a DIY project. Between the electrical, plumbing, structural, and code compliance requirements, you'll need licensed trades and proper permits. Budget an extra 15-20% for unexpected issues like foundation repairs or electrical panel upgrades — common in older NB homes.

Start by getting a pre-application meeting with your local building department to understand specific requirements for your area and property.