30x40 Metal Building Cost
A 30x40 (1,200 sq ft) metal building costs $17,000 to $70,000 depending on whether you're buying a bare shell or a fully finished building.
| Size | Sq ft | Shell / kit | Turnkey |
|---|---|---|---|
| 30x40 | 1,200 | $17,000 – $30,000 | $40,000 – $70,000 |
This estimate is interpolated from the same size-based data behind our full metal building cost guide, which covers what drives the price within this range, kit versus turnkey, region, and the specific cost factors for this building type, with primary sources cited.
What a 30x40 metal building is for
At 1,200 square feet, a 30x40 metal building is typically a clear-span steel building, rigid steel frames carrying the load with no interior posts to work around. That open floor is why steel is favored for commercial and agricultural use at this size, even though the frame itself costs more than post-frame.
What drives the price at this size
The spread from $17,000 to $70,000 on a building this size comes down mostly to steel gauge and loading. Heavier red-iron framing and higher snow or wind ratings raise the price before you add a single finish; insulation and doors do the rest. The clear span you're paying for is exactly what makes it worth it for equipment and vehicles. That's why the same 30x40 footprint can land anywhere in that range, the square footage barely moved, but what you put on and inside it did.
Treat $17,000 to $70,000 as your planning bracket, not a quote. Decide first whether you're buying a shell or a finished building, then price the slab, the openings and the finish separately, because those are the line items a builder's number will live or die on.
Want a different size, or a different building type entirely? Try the cost calculator for any width, length, or (for a barndominium or self-storage facility) total square footage.
Frequently asked questions
How much does a 30x40 metal building cost?
A bare shell or kit runs $17,000 to $30,000. A fully finished, turnkey building runs $40,000 to $70,000. See our full metal building cost guide for what drives the price within that range.