We prepare estimates and material takeoffs for garage builds across Canada, so instead of one vague number, we will break the true cost down the way an estimator does: by type, by size, and line by line from the concrete slab up, including the development permits and site costs most quotes conveniently forget.
Cost to build a garage in Canada by type
Garage type is the first budget decision. Here is where 2026 pricing sits for complete builds, including foundation, structure, roofing, and a standard overhead door:
| Garage type | Typical size | 2026 cost range |
|---|---|---|
| Single detached | 12×22 ft (264 sq ft) | $22k–$40k |
| Double detached | 22×24 ft (528 sq ft) | $30k–$80k |
| Attached single (addition) | 12×22 ft | $28k–$55k |
| Attached double (addition) | 22×24 ft | $45k–$95k |
| Detached with loft / storage truss | 24×24 ft | $55k–$110k |
| Garage with suite above (laneway-style) | 24×26 ft + suite | $150k–$300k+ |
| Prefab / kit garage (installed on your slab) | varies | $15k–$45k |
The garage-with-suite line deserves a note: once habitable space goes above a garage, the project stops being a garage and becomes a small building, with insulation, fire separation, HVAC, and full residential code applying. Budget it like the cost to build a house in Canada, not like a shed.
Cost to build a garage by size
For standard detached builds at a mid-range finish, here is what size translates to in 2026:
| Garage size | Square feet | 2026 cost range |
|---|---|---|
| 12×20 ft (compact single) | 240 | $20k–$34k |
| 14×22 ft (single + storage) | 308 | $24k–$42k |
| 20×20 ft (small double) | 400 | $28k–$56k |
| 22×24 ft (standard double) | 528 | $32k–$72k |
| 24×28 ft (oversized double) | 672 | $40k–$90k |
| 26×36 ft (triple / workshop) | 936 | $55k–$130k |
Ranges are CAD, complete detached builds. Cost per square foot drops as size grows because the door, permit, and mobilization costs spread across more area.
Cost to build a garage in Canada: line-by-line breakdown
When we do a takeoff on a garage, every trade gets its own line. Here is how a standard detached double splits in 2026:
| Line item | 2026 cost range | Budget share |
|---|---|---|
| Site prep + excavation | $1.5k–$5k | 4–8% |
| Concrete slab + grade beams (4–6 in) | $8–$14 / sq ft | 10–20% |
| Framing (walls + roof trusses) | $12–$25 / sq ft | 20–30% |
| Roofing (shingles, underlayment) | $5–$9 / sq ft | 8–12% |
| Siding + exterior finish | $6–$14 / sq ft | 10–15% |
| Overhead garage door (16 ft, insulated + opener) | $2.5k–$6k | 6–10% |
| Entry door + window | $800–$2.5k | 2–4% |
| Electrical (panel run, lights, outlets) | $2k–$6k | 5–10% |
| Permit + drawings | $500–$2.5k | 2–4% |
The two lines that decide whether your build lands at the low or high end are the slab and the framing package. Concrete pricing is volatile and regional, which is why we run a dedicated concrete estimating takeoff on every garage, and lumber pricing moves enough season to season that a current lumber takeoff can swing a quote by thousands.
A real worked estimate: 22×24 detached double in Alberta
Here is how a real estimate comes together for a standard 528 sq ft detached double garage in Calgary, mid-range finish, insulated door, sub-panel from the house:
| Line item | Estimated cost |
|---|---|
| Site prep, excavation, gravel base | $3,200 |
| Concrete slab with thickened edge (528 sq ft) | $5,800 |
| Framing: walls + engineered trusses | $9,600 |
| Roofing: architectural shingles | $3,400 |
| Siding: vinyl + soffit, fascia, eaves | $5,100 |
| 16 ft insulated overhead door + opener | $3,600 |
| Man door + window | $1,400 |
| Electrical: sub-panel, lights, outlets, exterior plug | $3,300 |
| Permit + site drawings | $1,100 |
| Disposal + contingency (8%) | $2,900 |
| Estimated total | $39,400 |
That lands in the middle of the double-garage band for a Prairie market. The same build in the GTA or Metro Vancouver typically prices 15 to 25 percent higher on labour alone. Add in-floor heat, insulation and drywall, and a heater, and this becomes a $52,000 to $58,000 project.
Attached vs detached: which costs more?
Counterintuitively, an attached garage usually costs more per square foot than a detached one, even though it shares a wall. Tying into the house means matching the existing roofline and siding, cutting into the structure, adding a fire-rated wall and door between garage and living space (required by code), and often relocating services. Detached builds are simpler structures on their own slab, which is why they dominate laneway and infill lots. The detached premium shows up instead on the site side: a longer electrical run, and in some municipalities a separate development permit with setback rules that decide where the garage can sit on your lot.
The costs most garage quotes leave out
- Demolition of the old garage. Tearing down and disposing of an existing structure runs $3,000 to $8,000, more if the old slab must be broken out.
- Driveway tie-in. New aprons and driveway extensions are almost never in the garage quote, and concrete or asphalt work adds $2,000 to $10,000.
- Electrical service capacity. Older 60 or 100 amp house panels may not support a garage sub-panel plus an EV charger without a service upgrade.
- Frost considerations. In most of Canada, attached garages and any garage with footings need frost-depth foundations; a floating slab is not always allowed. Local code decides, not the contractor’s preference.
- Eavestrough and drainage. Roof water has to go somewhere that is not your neighbour’s lot; grading and downspout runs are a real line.
Popular garage upgrades and what they cost
- Insulation + drywall + heat: $6,000 to $15,000 turns a cold shell into a year-round workspace, a popular upgrade everywhere winter is serious.
- EV charger rough-in or install: $600 to $2,500 depending on panel capacity and run length. Cheapest to do during the build, not after.
- Epoxy floor coating: $4 to $8 per sq ft installed.
- Storage loft (attic trusses): $2,500 to $7,000 extra at framing stage, dramatically more as a retrofit.
- In-floor radiant heat: $8 to $15 per sq ft, decided before the slab pours, impossible after.
Ways to cut the cost to build a garage
- Stick to standard dimensions. 22×24 and 24×24 use stock truss and door sizes; odd dimensions price like custom work.
- Choose a floating slab where code allows. On detached builds in permitting municipalities, it saves thousands over frost walls.
- Rough-in now, finish later. Conduit for a future EV charger or loft wiring costs almost nothing during framing.
- Compare a quality prefab kit against stick-built quotes for basic shells; on simple builds they can compete.
- Get a materials takeoff before tendering. Knowing your exact concrete and lumber quantities lets you compare contractor bids line by line, which is exactly what our construction takeoff services deliver.
Frequently asked questions
How much does it cost to build a garage in Canada in 2026?
Do I need a permit to build a garage in Canada?
Is it cheaper to build an attached or detached garage?
How much does a concrete garage slab cost?
How long does it take to build a garage?
Does building a garage add value to a home in Canada?
Resources and references
The codes and cost data referenced in this guide come from official Canadian sources. Verify current requirements with your municipality, as rules vary locally:
Related reading & services
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Request a Free EstimatePricing in this guide reflects 2026 Canadian market ranges and is provided for general budgeting purposes. Actual costs depend on your lot, municipality, and finishes. For an accurate figure, request a detailed estimate. Prices in CAD.