Garage Cost Calculator
Last updated: October 15, 2026
Estimate the cost to build or expand a garage using floor area, construction rate, doors, electrical work, permits and contingency.
Starting figures illustrate this model. Enter your own measurements, quoted costs and applicable terms; this page does not retrieve live prices or provider rates.
Estimated garage project cost
—
- Base structure cost: —
- Garage doors: —
- Electrical, design and permits: —
- Contingency: —
On this page
Quick summary: Estimate the cost to build or expand a garage using floor area, construction rate, doors, electrical work, permits and contingency.
Read the complete guide
Updated reference sections in this guide are in English.
What this calculator estimates
Estimate the cost to build or expand a garage using floor area, construction rate, doors, electrical work, permits and contingency.
How to use it
Enter Garage floor area (sq ft); Construction cost per sq ft ($); Number of garage doors; Installed cost per door ($); Electrical and lighting ($); Design and permits ($); Contingency (%). Select Calculate to update the results.
How the calculation works
The calculator combines area-based construction cost with garage-door, electrical, design and permit allowances, then adds contingency.
Worked example: starting scenario
| Garage floor area (sq ft) | 600 |
|---|---|
| Construction cost per sq ft ($) | 85 |
| Number of garage doors | 2 |
| Installed cost per door ($) | 2400 |
| Electrical and lighting ($) | 5000 |
| Design and permits ($) | 4500 |
| Contingency (%) | 10 |
| Estimated garage project cost | $71,830.00 |
|---|---|
| Base structure cost | $51,000.00 |
| Garage doors | $4,800.00 |
| Electrical, design and permits | $9,500.00 |
| Contingency | $6,530.00 |
Important limitations
Foundation, grading, utilities, living space, insulation, driveway, zoning and attached-versus-detached construction can change costs substantially.