30x40 Metal Building
The 30x40 metal building is the best-selling size in the country, and for good reason: 1,200 square feet of column-free space is enough for a four-car garage, a serious workshop, a small barndominium shell, or a commercial shop. With a taller eave it easily handles a vehicle lift or RV storage.
Starting From
Base kit, delivered — install & finishing extra
Dimensions
Width × length
Floor Area
Column-free clear span
Eave Height
Typical options
What fits in a 30x40?
- Up to 4 vehicles, or 2 vehicles plus a large workshop
- A barndominium shell with living quarters and a shop bay
- A workshop with a car lift and a loft mezzanine
- Light commercial, contractor, or agricultural use
What's in the $28,500 starting price?
That figure is for a base open-web-truss building kit, delivered to your site — engineered trusses, secondary framing, steel sheeting, fasteners, and stamped engineered plans, all backed by a 50-year structural warranty. Site prep, foundation, assembly, insulation, doors, windows, and any residential or barndominium finishing are additional. A fully finished 30x40barndominium runs significantly more than the base kit. Your exact price depends on your county's wind and snow loads, eave height, and the options you choose — which is why every quote is custom.
Get your free 30x40 steel building quote
Every AAIRE Co. building is engineered to your local wind and snow loads with stamped drawings included for permitting. Tell us about your project and we'll send a free, no-obligation quote for your 30x40.
Other popular metal building sizes
Starting prices are for a base open-web-truss building kit, delivered, and exclude foundation, assembly, and finishing. AAIRE Co. is a certified Worldwide Steel Buildings distributor serving all 50 states. Final pricing is always confirmed with a custom, permit-ready quote.