How much does demolishing an old garage and building a new one cost in Fredericton?

Demolishing an existing garage and building a new one in Fredericton typically costs between $50,000 and $95,000 total for a standard two-car replacement, with demolition and site preparation adding roughly $5,000 to $15,000 on top of the new construction cost. The total depends heavily on the size of the old structure, whether it contains hazardous materials, the size and features of the new garage, and site conditions.

The demolition phase itself generally costs $3,000 to $8,000 for a standard single or two-car garage in the Fredericton area. This includes the cost of a small excavator or skid steer, labour for teardown, and hauling debris to an approved disposal site. If the old garage has a concrete slab or frost wall foundation, breaking up and removing the concrete adds $2,000 to $5,000 depending on thickness and reinforcement. Asbestos-containing materials — common in garages built before 1990 in siding, roofing, and insulation — require professional abatement before demolition, which can add $1,500 to $5,000 depending on the extent of contamination. A qualified environmental consultant can test suspect materials for $200-$500 before demolition begins. The City of Fredericton requires a demolition permit, which is a separate application from the building permit for the new garage — budget $50-$200 for the demolition permit fee.

Once the old garage is down and the site is cleared, you are essentially starting fresh with new construction. A new two-car detached garage (24x24 to 24x30) in Fredericton runs $40,000 to $70,000 for a complete build including foundation, framing, roofing, siding, overhead doors, service door, electrical, and concrete slab. An attached two-car garage runs $50,000 to $80,000 because of the additional complexity of tying into the existing house structure, matching the roofline, and installing the required fire separation assemblies.

One advantage of a demolish-and-rebuild project is that you can often reuse the existing foundation if it is in good condition and meets current code requirements. Have a structural engineer or experienced contractor assess the old foundation before demolition — if the frost walls extend to proper depth (minimum 4 feet or 1.2 metres in the Fredericton area), the concrete is sound with no major cracks or heaving, and the dimensions work for your new garage design, reusing the foundation can save $8,000 to $15,000. However, if the old foundation is shallow, cracked, or undersized for the new garage, it must come out completely and be replaced. Many older Fredericton garages were built with foundations that do not meet current frost depth requirements — this is often the reason the old garage is failing in the first place.

Site preparation after demolition may include regrading the area, addressing drainage issues that may have contributed to the old garage's deterioration, and potentially relocating utilities. In Fredericton's river valley location, properties near the Saint John River or its tributaries may have additional considerations around grading and drainage to prevent water issues with the new garage. Budget $1,000 to $3,000 for site preparation and grading work beyond the basic demolition cleanup.

For timeline planning, the demolition typically takes 2-3 days for a standard residential garage. Allow 1-2 weeks for site preparation and foundation work, then 4-8 weeks for the new garage construction depending on size and complexity. The ideal time to start this project in Fredericton is early spring (April to May), allowing the foundation to be poured in warm weather and the entire project to be completed well before winter.

A demolish-and-rebuild project requires coordination between demolition contractors, foundation contractors, framers, roofers, electricians, and possibly plumbers — most homeowners hire a general contractor to manage the entire project. Get at least three quotes that include both demolition and new construction in a single scope of work, as this is typically more cost-effective than hiring demolition and construction separately. New Brunswick Garages can help you find experienced garage builders in the Fredericton area for free estimates on your project.