40×40 Metal Building
1,600 sq ft 12 to 16 ft eave
A 40×40 metal building gives you 1,600 square feet of clear-span, column-free space, a square footprint that works equally well as a multi-bay garage, a working shop, or covered storage. Universal Steel of America is a US manufacturer: we engineer, fabricate, and ship every 40×40 building to meet the snow, wind, and seismic codes enforced by your local building code.
Because the frame is pre-engineered red-iron steel, the full 40 ft width is open inside, with no interior posts to work around. We ship from the plant closest to your site across the US and, internationally, the Caribbean, Puerto Rico, South America and Africa, and professional erection is available as an optional service if you would rather not build it yourself.
- Dimensions
- 40 ft wide x 40 ft long
- Floor area
- 1600 sq ft
- Clear span
- 40 ft column-free
- Typical eave height
- 12 to 16 ft (8 to 20 ft available)
- Frame
- pre-engineered red-iron (PEMB) steel
- Panels
- 26-gauge steel roof and wall sheeting
- Loads
- engineered to local snow, wind, and seismic code
- Finish warranty
- 25 to 40 year paint and coating warranty
- Delivery
- shipped from the closest plant to your site
- Erection
- optional professional service
Popular uses for a 40×40 Metal Building
Three or four-car garage
With 1,600 sq ft and a 40 ft clear span, a 40x40 comfortably parks three to four vehicles for daily use and still leaves room for a workbench or tools. Run two 20 ft bays with separate roll-up doors, or open the span for a single deep garage. Taller eaves let you stack a car lift or store a truck and trailer together.
Metal garagesWorkshop or trade shop
The column-free floor makes a 40x40 a productive shop for woodworking, fabrication, or a contractor base. Twelve to sixteen feet of eave height clears a lift and lets you frame in a mezzanine or office in one corner. Wide door openings make it easy to move equipment and materials straight onto the work floor.
Shop buildingsRV and boat storage
Specify a 14 to 16 ft eave and a 40x40 swallows a Class A motorhome, a boat on its trailer, or several vehicles parked deep. The square footprint gives you room to walk around what you store rather than wedging it in. A tall roll-up door on the endwall keeps access simple.
RV and boat storage buildingsAgricultural and equipment storage
For farms and acreages, a 40x40 shelters tractors, implements, hay, or feed under one clear-span roof with no posts to steer around. The engineered frame is certified to your local snow and wind loads, so it holds up in open, exposed sites. Add a lean-to later for extra covered space along one wall.
Agricultural steel buildingsSmall commercial or retail space
At 1,600 sq ft a 40x40 suits a small commercial use such as a service bay, showroom, or trade counter with back-of-house storage. The clear span lets you lay out the interior however the business needs, and the steel shell is built to commercial code. Insulation and finished openings turn it into a customer-ready space.
Commercial steel buildingsBarndominium shell
A 40x40 is large enough to combine living quarters with a shop or garage in a barndominium layout. This is a secondary use and a distinct build path, since living space adds insulation, openings, and interior finishing the basic shell does not include. We route these projects through our dedicated barndominium page rather than treating it as a standard garage.
BarndominiumsWhat a 40×40 footprint gives you
At 40 by 40 feet the building is square, so the 1,600 square feet divides cleanly into bays. Most owners run two 20 ft bays for a three or four-car garage with room left for a bench, or open the whole span for a single large work area. The 40 ft clear span means no columns interrupt the floor, which matters when you are pulling a vehicle onto a lift or maneuvering equipment.
Match the eave height to the job
Eave height is what turns a 40×40 into the right building for your use. A 12 ft eave suits a standard garage or auto shop, while a 14 to 16 ft eave clears a motorhome, a car lift, or a mezzanine. Taller walls also make a real difference for agricultural equipment and stacked storage, so we size the eave to the tallest thing you plan to put inside.
Shop, storage, or living quarters
The same 1,600 sq ft shell handles a contractor shop, RV and boat storage, or light farm use without changing the structure. If you are considering finished living space, a 40×40 is large enough for a barndominium layout that pairs a shop with living quarters; that is a distinct build path, and you can read how we handle it on our barndominium page.
40×40 Metal Building questions
What is the average cost of a 40x40 metal building?
A fabricated 40x40 steel shell is typically around $29,000 to $42,000, while a finished, turnkey 40x40 on a concrete slab commonly runs about $48,000 to $72,000. That works out to roughly $18 to $26 per square foot for the shell and $30 to $45 per square foot turnkey. These are industry-typical estimates, not a Universal Steel quote; your price depends on eave height, finish, local code loads, and site conditions.
How many cars can you fit in a 40x40 garage?
A 40x40 garage (1,600 sq ft) comfortably fits three to four cars for everyday use with room left for a workshop or storage. Because the 40 ft span is column-free, you can park vehicles two deep at each door and reach up to six cars if you prioritize parking over work space. Eave height and door placement determine how easily you move between them.
How much does a 40x40 metal building with a concrete slab cost?
Adding a slab to a 40x40 typically costs $8,000 to $13,000 for a standard 4 inch reinforced floor over 1,600 sq ft. Combined with the steel shell, a building on a slab usually lands around $37,000 to $55,000 before erection, insulation, and openings. Thicker footings, reinforcement for heavy equipment, or poor soils push the foundation cost higher.
Is it cheaper to build a steel building or a pole barn?
For a 40x40, a pole barn can have a lower upfront shell price, but an engineered steel building usually wins on lifespan, span, and long-term value. Steel gives you a true 40 ft clear span with no interior posts, non-combustible framing, and a 25 to 40 year finish warranty, where a pole barn relies on wood posts that are limited on span and prone to rot and pests. Over the life of the building, the steel structure typically costs less to maintain.
What eave height should I choose for a 40x40 metal building?
Most 40x40 buildings use a 12 to 16 ft eave. Choose 12 ft for a standard garage or shop, and step up to 14 to 16 ft if you need to clear an RV, a car lift, or a mezzanine. We can engineer eaves from 8 ft up to 20 ft, so size the wall height to the tallest thing you plan to put inside.
Does a 40x40 metal building come with a warranty?
Universal Steel of America provides a 25 to 40 year warranty on the paint and coating finish, depending on the panel system you select. This finish warranty covers the durability of the color and coating against fading and failure. Every 40x40 is also engineered to meet the snow, wind, and seismic codes required by your local building code.
Get your 40x40 estimate
We engineer and ship from the closest plant, across the US and internationally. Tell us your site and use.