Can I build my own garage in New Brunswick without a licensed contractor?

Yes, New Brunswick homeowners are generally permitted to build a garage on their own property without hiring a licensed general contractor, but there are important legal and practical limitations you need to understand before picking up a hammer. NB does not require a general contractor licence for residential construction in the same way that some other provinces do, but specific trades — most importantly electrical and plumbing — must be performed by licensed professionals regardless of who builds the structure.

All electrical work in your garage must be done by a licensed electrician and requires a separate electrical permit and inspection. This is not optional and it is not something you can legally do yourself in New Brunswick, even on your own property. Wiring outlets, lighting, a sub-panel, a garage door opener circuit, or an EV charger hookup all require a licensed electrician who will pull the permit and arrange the inspection. Similarly, if your garage includes plumbing — a sink, floor drain connected to the sewer, or water supply — that work must be done by a licensed plumber with the appropriate permits.

For the building permit itself, most NB municipalities allow a homeowner to be the applicant and the builder of record on their own property. You will need to submit plans that show the proposed garage meets the NB Building Code requirements, including proper foundation depth below the 4-to-5-foot frost line, adequate structural framing for NB's snow loads of 2.4 to 4.8 kPa, correct roof design, and fire separation details if the garage is attached to your home. Some municipalities require that plans for structures over a certain size be prepared or reviewed by a professional engineer or architect — check with your local building inspection department before investing time in drawing your own plans.

The practical reality of owner-built garages in NB is worth considering honestly. A garage foundation is the single most critical element of the project, and it is the most unforgiving of mistakes. The footings must be below the frost line, the concrete must be properly mixed, placed, and cured, the slab must have a 6-mil vapour barrier underneath, and the drainage must direct water away from the foundation on all sides. A foundation mistake in NB's freeze-thaw climate shows up within the first winter as heaving, cracking, and misalignment — and the only fix is demolition and rebuilding. Most experienced builders strongly advise against DIY foundation work in NB for this reason.

Framing a simple single-car detached garage is within the capability of a skilled DIYer with construction experience, good tools, and a helper. A 12x20 or 14x24 single-car garage with a straightforward gable roof is a manageable project if you have framed walls before and understand how to read plans, layout plates, plumb walls, and set trusses safely. A two-car or larger garage with engineered trusses, large header spans over 16-foot door openings, and multiple bearing points is significantly more complex and carries greater structural risk if done incorrectly.

Roof truss installation is one of the most dangerous phases of any garage build. Trusses for a 24-foot-wide garage weigh 100 to 200 pounds each and must be lifted, positioned, and braced at height. Falls from height are the leading cause of construction injuries and fatalities in Canada. If you choose to set trusses yourself, you need a proper plan for temporary bracing, adequate help (minimum 3-4 people for a two-car garage), and fall protection equipment.

Insurance and liability are important considerations for owner-built garages. Your homeowner's insurance may not cover injuries to helpers or damage caused during construction. Some insurers will not cover an owner-built garage or will require a professional inspection before adding it to your policy. Discuss your plans with your insurance provider before starting.

The cost savings from owner-building can be significant — labour typically accounts for 40 to 50 percent of a garage construction budget, so a $50,000 two-car garage might be built for $25,000 to $30,000 in materials and subtrade costs if you do the general labour, framing, siding, and finishing yourself. However, this assumes you have the time, tools, skills, and physical ability to do the work correctly and safely. A garage that takes a professional crew two to three weeks to build may take an owner-builder two to three months of weekends.

If you decide the project is beyond your comfort level, New Brunswick Garages can match you with local garage construction professionals through the New Brunswick Construction Network — the matching service is free, and getting multiple quotes helps ensure you get fair pricing for your project.