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40x80 Metal building
Our bolt-up, pre-engineered 40′ x 80′ buildings are engineered to last, add value to your property, and provide dependable space even in the harshest environments, with warranties of 30+ years.
For a slightly higher investment, you get a custom, commercial-grade, solid steel-framed (not light gauge) building that can be tailored to suit virtually any application.
With 3,200 square feet of clear-span interior space and a trussless roof design, you can maximize your space in a rigid-frame building.
Let us help you find the best building package at the right price. Get competing price estimates from four reputable suppliers. We’ve done the heavy lifting so you can compare building pricing quickly and easily.
- Made in USA
- Solid Steel
- 30 Yr Warranty
- Custom Engineered
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Popular products
Here are some of our most popular standard height options for our 40×80 building kit products. Please be aware that a two-foot gap is required from the eave to the top of the tallest door (e.g. a 10′ door will require a 12′ eave height).
For floor plans and layout ideas, see our sample metal building plans.
Typical applications
A 40 x 80 metal building offers endless possibilities with 3 key options for customization. By choosing your preferred door type, size, and placement, it can be configured to form a structure that suits virtually any application.
What are red iron buildings?
A red iron building kit is a bolt-together structure precision-engineered from commercial-grade steel I-beams, ideal for constructing durable buildings like a garage or workshop.
Each kit is custom-manufactured to your exact specifications, including height, roof profile, and framed openings, and is designed to meet all local codes.
These commercial-grade buildings are built to last, adding significant value to your property, and are a superior alternative to tubular carport-style structures.
Average Cost to build
$27 - $40
per square foot
Building kit features
Standard 40×80 building kits include all primary and secondary steel framing, arch-style PBR metal roof and wall panels, and all fasteners and sealants. As the builder, you then decide how to customize the base building kit with door, window placement, and dimensions tailored to your specific needs—making it one of the most versatile options available.
Kit packages include:
- Steel I-Beam framing
- Steel roof & wall panels (26ga)
- Complete trim package
- Two framed door openings
- Foundation anchor bolt plans
- Engineer stamped plans
- Kit delivery
- Installation instructions
- All bolts, flashing & sealants
Benefit from:
- Bolt-up construction
- Trussless roof design
- Clearspan widths to 300′
- Certified to 160 MPH wind
- Certified to 110 PSF snow
- 30+ year warranty
- Fast, free delivery
- Fast build time
Custom options:
Doors – Choose overhead doors, rollup, sliding or bifold doors.
Roof profile & pitch – Adjust the gable pitch or select a single-slope, gambrel, or monitor profile
Insulation – Opt for vinyl-faced fiberglass, spray foam, or insulated metal panels (IMPs).
Structural upgrades – Add porches, overhangs, a carport lean-to, or a mezzanine for loft storage.
Items not included:
- Permits
- Foundation
- Installation
- Insulation
- Interior build out
How much does a 40x80 metal building cost?
The average cost of a 40×80 building is $86,400 to $128,600, installed. This includes the building kit package at $18-$22/sq ft, the slab foundation at $4-$8/sq ft, and the building construction at $5-$10 per square foot. If required, doors, windows, and insulation should also be budgeted for.
These costs vary depending on the location of the building site, local labor costs, and the complexity of the building’s design. Please use our quote request form for accurate written quotes from four competing suppliers, or for a quick 40×80 metal building price estimate, see our metal building prices page.
Frequently asked questions
What roof pitches are available for the 40x80 building kit?
Our 40×80 building kits come with a standard 2:12 roof pitch, but they can be engineered to pitches ranging from 1:12 to 4:12. For more specific information, custom roof pitches of 5:12 and 6:12 are also available from some of our suppliers. Please keep in mind that greater pitches can increase the price of the building. If you have any questions, feel free to call or email us.
How much does a 40x80 concrete slab cost?
A 40×80 concrete lab costs an average of $16,000. The price per square foot for materials and labor is typically between $4 and $6 per foot nationwide. The final cost may vary significantly based on your building location and the amount of site prep that will be required.
How many bedrooms can fit in a 40x80 building?
For a single story ranch-style home you get four good sized bedrooms. With the addition of another level you get a large six bedroom home with plenty of open-concept living space.
What alternatives are there to a 40x80?
Other standard building sizes worth considering include our 40×60 steel building package with 2,400 sq ft of floor space or our 50×80 metal building kit with an expansive 4,000 square feet of unobstructed floor space, making them the stars of versatility and functionality in construction.
Further Reading
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Why choose us?
BuildingsGuide simplifies the process of finding reputable suppliers of prefab metal buildings, allowing you to select the ideal vendor for your needs and budget.
Since 2004, over 200K buyers have saved an average of 28% on their project with our multiple quote service.
Proudly serving customers in the United States & Canada for over 20 years.
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Let us help you find the best deal on a metal building for sale.
- Tell us about your project
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- You receive four competing quotes
- Select the most suitable supplier
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