The size of a metal garage significantly affects its cost. A 12×20 garage may cost around $6,000, while a 30×40 structure can exceed $20,000. Larger garages require more materials and stronger framing, raising costs. Size also determines foundation size, installation time, and insulation, all of which impact your budget.
- Cost per square foot: On average, metal garages cost $10–$25 per square foot. Larger structures often have lower per-square-foot costs due to scaling.
- Single-bay vs. multi-bay prices: Adding bays for multiple vehicles increases material and construction costs significantly. Each bay adds 20–30% to the base cost.
- Height considerations: Taller garages for RVs or trucks demand stronger steel and increase labor costs. Expect a 10–20% price increase.
- Storage space impact: Adding lofts or extended storage areas increases framing complexity, requiring more steel and reinforcing materials.
- Permits for larger garages: Bigger garages may require special permits or engineering plans, adding $500–$2,000 to your total cost.