Building a Detached Garage in Calgary: Start to Finish
A new detached garage adds resale value, practical storage, and — if done right — a second living space. Here’s everything you need to know before breaking ground.
Why Detached Over Attached?
- More flexible design (heights, footprint, features)
- Can go taller (for lifts, storage lofts)
- Easier to add a suite above in future
- Less structural impact on main home
- Better separation (noise, fumes) from living space
Calgary Zoning Rules for Detached Garages
- Most R-1 lots: max 75 m² (807 sq ft) without development permit
- Larger garages require development permit (discretionary — usually approved)
- Setbacks: 0.6m (2′) from side and rear property lines typical
- Max height: typically 4.6m (15′) for detached accessory building
- Always verify with City of Calgary myGov or 311 before planning
Foundation Options
| Foundation Type | Cost (double garage) | Best For |
|---|---|---|
| Concrete slab (floating) | $8,000–$18,000 | Standard garages |
| Perimeter footing + slab | $15,000–$30,000 | Heated garages, suites above |
| Full foundation (basement) | $40,000–$80,000 | Suite above, large builds |
| Helical piers | $8,000–$20,000 | Soft soil, trees nearby |
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⚠ Estimate Disclaimer: These are only ROUGH estimates that can vary wildly. Do not take these numbers as gospel. Having a defined scope of work and exact selections will give you clarity.
Sizing Guide
- Single (1 vehicle): 12’×22′ minimum (14’×24′ comfortable)
- Double (2 vehicles): 22’×24′ minimum (24’×26′ comfortable)
- Triple (3 vehicles): 30’×24′ minimum (36’×28′ comfortable)
- Shop/oversized: 40’×30’+ (custom)
Key Features to Spec During Planning
- 9′ or 10′ ceiling height: Gives room for lifts, overhead storage, and vehicles with roof racks
- 100A subpanel: Room for EV charger, heater, compressor, tools
- Floor drain: Essential for Calgary winters — wash vehicles, snow melt
- In-floor heat rough-in: Add PEX tubes before slab pour — negligible added cost now, huge cost later
- Service door: Separate man door for access without opening the main doors
- Hose bibb: Both interior and exterior — for washing
Build Timeline
- Design + permit applications: 6–12 weeks
- Site prep + foundation: 2–3 weeks
- Framing + sheathing: 2–3 weeks
- Roofing + siding: 1–2 weeks
- Electrical + mechanical: 1–2 weeks
- Insulation + drywall: 1–2 weeks
- Doors + finishes + floor: 1–2 weeks
- Total: 14–26 weeks
Cost to Build a Detached Garage in Calgary
| Type | Size | Cost |
|---|---|---|
| Basic single (unfinished) | 14’×24′ | $40,000–$65,000 |
| Double (insulated, heated) | 24’×26′ | $80,000–$140,000 |
| Triple (premium finish) | 36’×28′ | $160,000–$280,000 |
| With suite above | 24’×28′ | $260,000–$480,000 |
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⚠ Estimate Disclaimer: These are only ROUGH estimates that can vary wildly. Do not take these numbers as gospel. Having a defined scope of work and exact selections will give you clarity.
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Olympic City Renovations serves Calgary, Priddis, Okotoks, and surrounding communities.