What are the fire code requirements for home renovations in NB?

New Brunswick's fire code requirements for home renovations centre on smoke alarm placement, carbon monoxide detector requirements, fire separations between occupancies, and egress provisions — and pulling any building permit triggers a review of your home's compliance with current life-safety standards. These requirements are not optional extras; they exist because fires kill people, and the code provisions reflect decades of hard-won knowledge about how residential fires spread and how to give occupants time to escape.

For smoke alarms, the NB Building Code and Fire Prevention Act require interconnected smoke alarms on every storey of a dwelling, including the basement. When you pull a building permit for a renovation — even a kitchen update or basement finishing project — the inspector will verify that your smoke alarm layout meets current code. If your home has a single, isolated smoke detector from the 1990s in the hallway, expect to be required to upgrade to interconnected units (hard-wired with battery backup, or battery-only interconnected units) as a condition of the permit. Carbon monoxide detectors are required near sleeping areas in any home with a fuel-burning appliance, attached garage, or wood-burning fireplace. NB code aligns closely with the NBC provisions on this, and enforcement has tightened in recent years.

Fire separation requirements become important in specific renovation scenarios. If you're finishing a basement that will be used as a secondary suite or rental unit, NB code requires a fire-rated separation (typically 30-minute fire separation, often achieved with Type X drywall on the ceiling of the basement/floor of the main level) between the two dwelling units. The same principle applies if you're converting a garage into living space — the separation between the garage and the house must meet fire separation requirements. For attached garages that already exist, any renovation that changes the garage's use or the opening into the house triggers a review of the existing separation.

Egress is the other major fire-code consideration for basement renovations. If your finished basement will include a bedroom — or any room that could be used for sleeping — it must have a compliant egress window: minimum 0.35 square metres of clear opening area, minimum 380 mm in any dimension, and a sill height no greater than 1,000 mm above the floor. NB homes with basements below grade often have small, hopper-style windows that do not meet these dimensions. Installing a proper egress window in a basement bedroom is not optional — it can be the difference between surviving a nighttime fire and not. The work requires a permit, typically involves excavating a window well on the exterior, and costs $2,500-$5,000 per opening depending on foundation type and soil conditions.

For homes with attached garages — common across Moncton's suburbs, Riverview, Rothesay, and Quispamsis — any renovation touching the garage-to-house connection point should include a review of the fire separation. The door between an attached garage and living space must be a solid-core or fire-rated door (typically 20-minute rated) with a self-closing mechanism. This is a code requirement that many older NB homes predate but that comes into scope when permits are pulled for nearby work.

Practically speaking, the best approach before any significant renovation is to book a conversation with your local building department about your project scope. They will tell you which fire-code provisions apply, what upgrades are required as a condition of the permit, and what the inspection sequence looks like. In Saint John, Moncton, and Fredericton, building inspectors are generally approachable and willing to answer questions before you submit a formal application. Taking that step costs nothing and can prevent expensive surprises mid-project.

Contractors working on NB renovations should be familiar with these provisions — particularly electricians who install smoke and CO alarm systems, and framers who build fire separations in multi-unit or garage conversion projects. Always confirm that your contractor has experience with the specific code requirements for your project type, and that all work will be inspected. New Brunswick Renovations can connect you with experienced renovation professionals who understand NB fire code compliance.

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

• Thirty Four Renovations
• Gionetterenovations