40x40 Metal Building Kit
40x40 Metal Building Kit: A Versatile Size for Any Use
The 40×40 metal building gives you 1,600 square feet of clear span space, making it one of the most flexible sizes Mason Steel offers. It works just as well for a residential garage, a hobby workshop, a small commercial shop, or an agricultural outbuilding.
Whether you need room for trucks and equipment, a workspace for your business, or a backyard shop you can grow into, the 40×40 footprint hits a sweet spot of size, value, and usability.
Why Choose a 40×40 Metal Building
- Wide open 1,600 square foot footprint with no interior columns
- Tall enough for RVs, lifts, and oversized equipment when paired with the right wall height
- Easy to expand later with lean tos or additional bays
- Affordable footprint that still feels spacious inside
- Ideal for both residential and light commercial use
Call us today for expert steel construction.
Phone: 877-76-STEEL
What's Included With Every Mason Steel Building
- Red iron rigid I beam steel frame
- 26 gauge PBR panels on roof and walls
- Galvalume steel for superior rust and corrosion resistance
- Fully engineered and stamped drawings for your zip code
- Anchor bolt plans for your concrete contractor
- Shipping to your job site
Every building is custom engineered for your location to meet local wind, snow, and seismic code requirements. Learn more about our warranty and what that protection means for the long life of your building.
Popular Uses for a 40x40 Steel Building
- Residential garages with room for three or four vehicles
- Personal workshops and hobby spaces
- Small business shops and contractor headquarters
- Equipment storage for farms and ranches
- RV and boat storage
- Backyard barndominium starters
Browse our gallery to see how our customers have used buildings of similar sizes.
Customization Options
- Custom wall heights from 10 feet up to 20 feet or taller
- Roll up doors, walk in doors, and framed openings
- Standard or insulated windows
- Insulation packages for any climate
- Lean tos and side extensions
- Wide color selection for walls, roof, and trim
How the Process Works
- 1. Request a free quote and tell us your size, location, and use
- 2. Your building is custom engineered for your zip code
- 3. Permit drawings are prepared based on your local code requirements
- 4. Production runs based on size and season
- 5. Your kit ships from the nearest hub directly to your property
For a full step by step breakdown, visit our Order Process page.
Frequently Asked Questions
Get a Free Quote on Your 40x40 Metal Building
Mason Steel Buildings ships factory direct to all 50 states. Request a free quote today, contact us for help, or design your building online with our 3D Designer.
Phone: 877-76-STEEL