Should I add a garage during a renovation or build one separately in NB?

Building a garage during a major home renovation is typically more cost-effective than constructing it separately, saving 15-25% on total costs through shared mobilization, permits, and contractor coordination. However, the decision depends on your renovation timeline, budget constraints, and whether your current project involves exterior work or additions.

Cost Considerations for NB Garage Construction

A detached single-car garage (12x20 feet) costs $12,000-$18,000 in New Brunswick, while a double-car garage (24x24 feet) runs $18,000-$28,000. Attached garages cost slightly less since they share a wall with the house — typically $10,000-$15,000 for single-car and $15,000-$22,000 for double-car. These prices include concrete foundation, framing, roofing, siding to match your home, electrical service for lighting and outlets, and a standard overhead door.

When you build during an existing renovation, you can often negotiate better rates with contractors already mobilized on your property. The same crew handling your addition or siding replacement can seamlessly add garage construction to the scope. You'll also save on permit fees since garage construction can often be included in your existing building permit application rather than requiring a separate submission.

Timing and Coordination Benefits

If your renovation involves exterior work — new siding, roofing, windows, or additions — adding garage construction makes excellent sense. The siding and roofing materials can be ordered together, ensuring perfect colour and texture matching. The same foundation crew can pour both your addition and garage footings during the same mobilization, and the framing crew can work efficiently between both structures.

New Brunswick Climate Considerations

NB's harsh winters make attached garages particularly valuable, providing protected access to your vehicle and additional storage for seasonal equipment. However, attached garages require careful attention to fire separation (5/8" drywall on garage side), proper ventilation to prevent carbon monoxide infiltration, and insulation considerations if you plan to heat the space.

Detached garages offer more flexibility in placement and don't affect your home's heating efficiency, but you'll face the same spring snowmelt and drainage considerations as any new foundation. Garage placement should consider prevailing winds, snow drifting patterns, and drainage away from both the garage and your home's foundation.

Foundation and Seasonal Timing

Garage foundations in NB must extend below the 4-5 foot frost line, requiring significant excavation and concrete work. This is best scheduled during the same timeframe as any other foundation work on your property — typically June through September when ground conditions are stable and concrete can cure properly.

Spring snowmelt raises the water table across NB, so garage foundation work should include proper drainage planning. A garage built during your home renovation can tie into the same drainage improvements, French drains, or grading corrections being made around your house.

When to Build Separately

Build your garage as a separate project if your current renovation is purely interior (kitchen, bathrooms, basement finishing) with no exterior work planned. Also consider separate construction if your renovation budget is already stretched — garages can wait while essential living spaces take priority. If your renovation timeline is tight and you need to minimize disruption, postponing garage construction prevents additional complexity during an already demanding project.

Practical Planning Steps

Start by determining if your property has suitable space and municipal setback requirements for garage placement. Most NB municipalities require 3-5 foot setbacks from property lines for detached garages. Check with your local building department about combining garage construction with your existing renovation permits.

Get quotes for both scenarios — garage included in current renovation scope versus standalone construction next year. Factor in the coordination benefits, material matching advantages, and potential contractor discounts for combined work.

Need help finding an experienced contractor who can handle both your renovation and garage construction? New Brunswick Renovations can connect you with local professionals who specialize in coordinated project delivery.