Garages & Building

The order that saves money

1. Find out what you're allowed to build, before you design anything. Setbacks, maximum lot coverage, height limits, and whether an accessory structure is permitted at all are decided by your zoning bylaw, not by your budget or your lot's apparent empty space. A fifteen-minute call to the municipal planning counter is free and routinely changes the design. People who skip this step are the ones who discover at permit stage that the garage has to move three metres and lose a bay.

2. Settle size and finish level next, because they dominate everything downstream. An unheated shell and a finished, heated shop are different buildings with the same footprint, and the difference can approach double. Be honest about what you'll actually use it for. The most expensive version of this mistake is building a cold shell and heating it badly for a decade; the second most expensive is insulating and heating a building used for storage.

3. Foundation follows from soil, frost depth, and what your municipality permits — not from what's cheapest. Confirm whether a slab-on-grade is acceptable before pricing one. This is also the stage where site conditions surface: soft ground, rock, or a high water table all change the number materially and none of them are visible from the driveway.

4. Roof decisions are last but not late. Pitch and truss type have to be settled before the roof is ordered, because attic space, storage, and headroom can't be added afterward without replacing the structure. If there's any chance you want a room or storage up there, decide now.

5. Get the power quote in writing before you fix the building's location. On rural properties this is regularly the largest single surprise in the budget, and it scales with distance from the existing service. Moving the building closer to the source is the cheapest fix and impossible once the slab is poured.

Where garage budgets go wrong

• Pricing the building and forgetting the site. The structure is the predictable part. Excavation, granular, the driveway or apron, and running power to it are where estimates move — and they're easy to leave out of a mental budget entirely.
• Comparing quotes with different scopes. The cheapest quote is frequently the one that excluded the most. Ask each contractor specifically what's in and out before treating the numbers as comparable.
• Assuming the permit is a formality. Most applications that get returned are returned as incomplete, not as refused — missing drawings, no lot-coverage calculation, dimensions that don't reconcile with the zoning. That's a delay you can prevent entirely by asking for the checklist first.
• Forgetting development charges, which some municipalities levy separately from the permit fee.
• Under-sizing. The most common regret is a garage a metre or two too small to work around a vehicle. Since fixed costs don't scale with area, the incremental cost of building it right is usually smaller than people assume.
• Deciding the roof twice. Trusses are engineered and ordered once. Changing your mind about attic space after they're set means a new roof.

Work through the tools above in that order and the expensive surprises mostly surface while they're still free to fix.