40x80 Barndominium Floor Plans
A 40x80 footprint is 3,200 sq ft. Fully finished as living space it's a large four-bedroom home, but 40x80 is the size most often split, for example about 2,000 sq ft of living plus a 1,200 sq ft double shop bay.
- Living space
- 3,200 sq ft
- Typical fit
- 4 bed, or 3 bed plus a double shop bay
- Finished cost
- $255,000–$720,000
Range spans the cheapest to the priciest US region at a mid-range finish, from the same engine as our cost estimator. It is a planning estimate, not a quote.
Decisions that make or break this plan
Treat the shop as a separate cost line
Shop space is priced far below finished living space. Estimate the two halves separately instead of applying one per-square-foot number.
Plan a firewall and separate zones
Where living meets shop, plan the shared wall, door, and air separation up front. Retrofits are messy.
Size the electrical service for the shop
Welders, compressors, and lifts drive the panel size, not the house.
Where to get a plan drawn
IronField doesn't draw plans. They come from your kit supplier, a local draftsperson, your builder, or a plan provider.
Want a second opinion on a plan you already have? Our plan review covers layout and mechanical placement.
Questions
What is a typical living-to-shop split in a 40x80?
About 2,000 sq ft of living and 1,200 sq ft of shop is a common split; adjust to your equipment and household size.
More floor plan guides
- 30x40 Barndominium Floor Plans
- 40x60 Barndominium Floor Plans
- 3-Bedroom Barndominium Floor Plans
- 4-Bedroom Barndominium Floor Plans
- Barndominium Floor Plans Under 2,000 Sq Ft
- Barndominium Floor Plans With a Large Shop
- Barndominium Floor Plans for Radiant Floor Heating
- Barndominium Floor Plans With a Proper Mechanical Room
Continue Planning Your Build
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Statewide code, shoreland zoning near lakes, and extreme cold for Minnesota.
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Statewide code, lake-effect snow, and dairy-country post-frame culture for Wisconsin.
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Statewide code, manufacturing-driven supply chain, and flat-vs-hilly terrain for Indiana.
Barndominiums in Utah
County-enforced state code, Wasatch Fault seismic zone, and desert-vs-mountain climate split for Utah.
Barndominiums in Idaho
No statewide code mandate, north-vs-south climate split, and Treasure Valley growth for Idaho.
Barndominiums in Montana
State-fills-the-gap code enforcement, severe snow/wind load, and wildfire defensible space for Montana.