Garage Size and Layout Calculator
Calculate the recommended garage dimensions, total area, and layout breakdown based on your vehicles, storage, and workspace needs.
Your garage layout results will appear here.
Formulas Used
Car Stall Dimensions (per vehicle):
- Compact: 9 ft wide × 18 ft deep
- Standard: 10 ft wide × 20 ft deep
- Large: 12 ft wide × 22 ft deep
Vehicle Area = Stall Width × Number of Cars × Stall Depth
Total Depth = Stall Depth + Maneuvering Clearance (4 ft standard, 6 ft extra)
Storage Strip Width = Storage Area (sq ft) ÷ Total Depth
Workspace Strip Width = Workspace Area (sq ft) ÷ Total Depth
Total Width = (Stall Width × Cars) + Storage Strip Width + Workspace Strip Width [rounded up to nearest foot]
Final Recommended Area = Total Width × Total Depth
Assumptions & References
- Stall widths and depths follow ITE (Institute of Transportation Engineers) and HUD Minimum Property Standards guidelines.
- A standard single-car garage is typically 12 × 22 ft (264 sq ft); a two-car garage is typically 20–24 × 22 ft (440–528 sq ft).
- Maneuvering clearance of 4 ft (2 ft front + 2 ft rear) is the practical minimum; 6 ft is recommended for comfort.
- Storage areas assume wall-mounted shelving and floor storage along one side wall.
- Workspace areas are based on typical home workshop layouts (workbench + tool clearance).
- Garage door widths: single = 9 ft, double = 16 ft (standard residential sizes per DASMA).
- Minimum ceiling height of 8 ft is required by most building codes; 9–10 ft is recommended for taller vehicles or overhead storage lifts.
- Layout assumes a side-by-side (not tandem) vehicle arrangement.
- Local building codes and zoning setback requirements may impose additional constraints — always verify with your local authority.