Can I convert my garage into a living space in Moncton NB?

Yes, you can convert a garage into living space in Moncton, but it requires building permits, compliance with the NB Building Code, and potentially a zoning variance depending on your neighbourhood and what you plan to use the space for. A garage conversion is one of the most cost-effective ways to add living space to a Moncton home, but it involves far more than just throwing down flooring and adding drywall — the space must meet all the requirements for habitable living space under the building code.

The first step is checking with the City of Moncton's planning and building inspection department. Moncton's zoning bylaw dictates whether your property can have the garage converted and may impose conditions. If the conversion eliminates your only enclosed parking, some residential zones require that you maintain a minimum number of off-street parking spaces — you may need to add a driveway pad or demonstrate that adequate parking exists on the lot. If you are converting the garage into a secondary suite or apartment, Moncton has been increasingly supportive of secondary suites and accessory dwelling units (ADUs) in recent years, but specific zone permissions, lot size minimums, and owner-occupancy requirements may apply. Your building permit application will trigger a zoning review that clarifies these requirements.

Structural and code requirements for a Moncton garage conversion are substantial. The garage floor is typically 4 to 6 inches lower than the house floor and is sloped toward the overhead door for drainage — it will need to be levelled, and a proper subfloor system installed to create a flat, insulated surface. In Moncton's climate, with frost depth reaching 4 to 4.5 feet and winter temperatures dropping to -20 to -25 degrees Celsius, the converted space must be insulated to meet the NB Building Code's energy efficiency requirements. Walls need a minimum of R-20 insulation, and the ceiling (if it separates the living space from an attic or unheated space above) needs R-32 to R-50. If the garage slab has no vapour barrier beneath it — and many older Moncton garages do not — moisture management becomes a significant concern that may require an interior vapour barrier system or a dimpled membrane beneath the new subfloor.

The overhead garage door opening must be filled in with a framed, insulated wall section that includes at least one egress window — the building code requires that every bedroom or sleeping area have a window large enough for emergency escape. The minimum egress window size is 3.8 square feet of openable area with minimum dimensions of 15 inches wide and 24 inches high, and the bottom of the opening must be no more than 39 inches above the floor. This new wall section must match the house's exterior cladding and be properly flashed and sealed against Moncton's Maritime moisture.

Mechanical systems need attention. The existing HVAC system may or may not have capacity to heat and cool the additional space — a load calculation will determine this. If the conversion includes a bathroom, plumbing must be brought to the space, which may involve cutting through the concrete slab for drain lines. Electrical must be upgraded to provide the required number of receptacles, lighting, and circuits for a habitable room — the existing garage wiring (typically one or two circuits) is never sufficient.

Budget for a garage conversion in Moncton: A basic conversion (insulation, drywall, flooring, electrical upgrades, window installation, overhead door infill, and HVAC extension) runs $15,000 to $30,000. Adding a bathroom pushes the cost to $25,000 to $40,000. A full secondary suite with kitchen, bathroom, separate entrance, and independent mechanical systems runs $35,000 to $50,000 or more. These costs reflect Moncton-area pricing, which runs approximately 10 to 15 percent below the national average.

This is not a DIY project — garage conversions involve structural, insulation, electrical, plumbing, HVAC, and code compliance work that requires professional contractors. Get matched with experienced renovation contractors through New Brunswick Garages for free estimates on your Moncton garage conversion.