What is the maximum square footage for a garage without a permit in rural NB?

There is no single province-wide threshold — permit requirements in rural New Brunswick vary by municipality, and assuming you can build without one is one of the most common and costly mistakes NB homeowners make.

The figure most often cited is 108 square feet (10 square metres), which comes from the National Building Code's accessory structure exemption. Some rural NB municipalities do use this threshold, meaning a small shed or storage structure under that size may not require a permit. But a garage — even a small one — almost always exceeds 108 square feet, and many municipalities have stricter rules that require permits for any permanent structure regardless of size.

New Brunswick's municipalities have significant autonomy over local zoning and building bylaws. A rural community outside Fredericton may have different rules than a rural community outside Bathurst or Woodstock. Some Local Service Districts (LSDs) and rural areas fall under provincial oversight rather than a local building department, which changes the process but does not eliminate permit requirements entirely. The only way to know for certain is to contact your local municipal office or the Service New Brunswick regional office that covers your area and ask directly — before you break ground.

Even if a permit technically isn't required, there are strong reasons to pull one anyway. Unpermitted structures can complicate or void your homeowner's insurance coverage if something goes wrong. When you sell your property, a buyer's home inspector or lawyer will flag an unpermitted garage, and you may be required to bring it up to code at your expense before closing — or reduce your sale price to compensate. Mortgage lenders and title insurers increasingly scrutinize unpermitted structures. A permit and inspection protects you as much as it protects your neighbours.

Setbacks apply whether or not a permit is required. Even in rural areas where a small structure might be exempt from a building permit, your property's zoning still dictates how close a garage can be to your property lines, any easements, and the road right-of-way. Building a garage that encroaches on a setback or easement can result in a forced removal order — an expensive lesson that no permit exemption protects you from.

From a structural standpoint, NB's frost depth of 4 to 5 feet doesn't care whether your garage has a permit or not. A garage built on a shallow foundation will heave and crack within a few winters regardless of its legal status. If you're investing $25,000 or more in a garage, the $200-$500 cost of a building permit is genuinely the least of your concerns — the inspection process actually works in your favour by catching foundation, framing, and electrical issues before they become expensive problems.

The practical advice: Call your municipal office or the provincial building inspection authority for your area before designing anything. Ask specifically about permit thresholds for detached accessory structures, setback requirements for your zone, and whether your lot has any easements or right-of-ways that would restrict placement. This one phone call takes 15 minutes and can save you from a very expensive mistake.

If you're ready to move forward with a garage project, New Brunswick Garages can match you with local contractors who know your municipality's requirements and build to NB code standards. You can also find general contractors and builders through the New Brunswick Construction Network directory.