40×80 · custom-designed
40×80 Barndominium
A 3,200 sqft (40 ft × 80 ft) custom steel barndominium — designed around your layout, not a stock floor plan. Shell kits start from $28/sqft; turnkey delivery through our vetted contractor network starts from $368,000 where coverage exists. The 40×80 is built to carry a full family home and a serious attached shop under one roof.
Pricing
How Much Does a 40×80 Barndominium Kit Cost?
The shell kit for a 40×80 starts from $89,600 — the engineered steel frame, roof and wall panels, fasteners, and hardware, delivered to your site at $28/sqft across the full 3,200 sqft footprint. Turnkey delivery — a move-in-ready home built through our vetted contractor network — starts from $368,000 at the blended national rate of $115–$200/sqft, all-in across the full footprint.
Finish level on the living side is the single biggest swing in the turnkey range. Cabinets, flooring, countertops, and fixtures can roughly double the per-sqft cost between a builder-grade package and a high-end finish — so two 40×80 builds with the same layout can land at opposite ends of the $368,000–$640,000 band purely based on how the living side is appointed.
Shop configuration is the next largest driver. A 2-bay vs. 3-bay layout, sidewall height, overhead-door count and spec, and whether the shop is conditioned (insulated and HVAC’d) or left as open shop all move the number meaningfully. A loft added over the living side — picking up a second-floor master suite or bonus room without increasing the footprint — adds cost but delivers usable area at a strong value per sqft compared to expanding the footprint. Foundation type and site-specific work (utility runs, septic, well, driveway) round out the variation.
Geography is the single biggest cost driver across markets. Midwest and Southern rural markets sit at the low end of the national range; rural Northeast, mountain West, and Pacific Northwest sit at the high end. For accurate pricing in your market, visit your state page.
What fits
What Can You Fit in a 40×80 Barndominium?
In the standard shop-house split, a 40×80 divides into roughly 2,000 sqft of living and a 2–3 bay shop. The living side supports 3 bedrooms, 2 bathrooms, an open kitchen and great room, utility room, and a mudroom or drop zone — a complete, functional family home. The shop side fits two full-size trucks plus an RV, boat, or project-vehicle bay, or a multi-station workshop with genuine room to move. Sidewall height and overhead-door spec are custom to your build.
The living side has real depth at this footprint — not a compressed layout that sacrifices the mudroom or utility room to make the bedroom count work, but a plan where each zone gets the sqft it needs. A loft over the living side adds significant usable area without touching the footprint: a second-floor master suite, kids’ bunkroom, or finished bonus room are all viable. An in-law or guest suite fits within the living footprint for households with multi-generational needs.
The shop side is what separates the 40×80 from smaller footprints. At 2–3 bays, it isn’t a garage — it’s a working shop. For a homesteader, that means covered storage for tractors, hay equipment, ATVs, and project vehicles alongside the main home. For a tradesperson, it’s a real working shop plus 3-bedroom living under one roof. Sidewall height is specified to your overhead-door and equipment requirements, not defaulted to a residential minimum.
The 40×80 advantage
The Shop Side Fits What Smaller Footprints Can’t: Two Trucks, an RV or Boat Bay, and Room to Work
The 40×80’s 80 ft run is what gives the shop side its usefulness. Where a 40×60 can fit two vehicles and a workbench, the 40×80 adds a full third bay — enough for an RV, a boat, or a project vehicle alongside two daily drivers — plus the lateral room for a multi-station workshop. That depth is the structural reason homesteaders and tradespeople choose this footprint over its smaller neighbor.
A 40×60 forces a choice: a real shop or a real home, not both at full scale. The 40×80 doesn’t. The extra 800 sqft goes into the shop without compressing the living side — the mudroom, utility room, and open great room all stay. That’s the difference between a shop-house and a home with an attached garage.
Layouts
How a 40×80 Can Lay Out
We design custom plans — not stock floor plans. The 3,200 sqft footprint runs from an all-living home to a shop-forward build, drawn around your household and site.
The same 40×80 shell runs the full range — from All-living to Mostly shop, and anywhere in between. These are common starting points, not fixed plans. Every 40×80 we build is custom-drawn from scratch.
Drawn to scale. The living-to-shop split shown is just one of many possible layouts — every 40×80 is designed from scratch.
The shop-house split is the default and most popular configuration: roughly 2,000 sqft of living (3 BR, 2 bath, open kitchen and great room, utility, mudroom) and a 2–3 bay shop custom-specced for sidewall height and overhead doors. Your plan sets the dividing wall — biased more toward shop or more toward living depending on your priorities.
The all-living configuration turns the full 3,200 sqft into a single-story home. At that scale, your plan supports 4–5 bedrooms, 3 bathrooms, a dedicated office or guest suite, a large great room, and a covered porch — a home that competes with conventional construction at this sqft but at lower cost per sqft than stick-built at comparable finish levels.
The living + medium shop configuration splits at roughly 2,400 sqft of living (3–4 BR, 2.5 baths, open plan) plus an 800 sqft 2-bay attached shop or garage — a middle path between the full shop-house and all-living. This layout suits households that want a real garage and workshop space but don’t need the full 2–3 bay depth of the standard split.
A loft over the living side is a strong option at this footprint — the 40 ft width gives the structural span to carry a useful second floor. A second-floor master suite, kids’ bunkroom, or finished bonus room adds meaningful area without increasing the footprint. Vaulted great-room ceilings, covered porches, in-law suites, and exterior panel and color selection are all drawn into your plan at the design stage.
Best for
What a 40×80 Barndominium Is Best For
The 40×80 is best for larger families and homesteaders who need real shop space and a complete family home in one envelope — not a home with a garage bolted on, but a purpose-built shop-house where both sides are full-scale.
Larger families wanting acreage living with a serious attached workshop benefit most from this footprint: the living side delivers a 3-bedroom home with mudroom and utility room at full scale, while the shop side covers the equipment and vehicle storage that a rural property demands. There’s no compression on either side to make the footprint work.
Homesteaders needing storage for tractors, hay equipment, ATVs, and project vehicles alongside a full family home find the 2–3 bay shop depth essential. A 40×60 forces a choice between vehicle capacity and workshop space; the 40×80 doesn’t. Tradespeople who want a real working shop — multi-station, with overhead-door spec sized to the trade — plus 3-bedroom living under one roof are a natural fit at this size.
Multi-generational households find the 40×80 living side spacious enough for an in-law or guest suite on top of standard family bedrooms. At 2,000 sqft of living in the standard split, or the full 3,200 sqft in the all-living configuration, there is genuine room for two adult households to coexist without the layout feeling forced.
Size comparison
40×80 vs. Other Sizes
| 40×80 | 40×60 | 50×80 | |
|---|---|---|---|
| Footprint | 3,200 sqft | 2,400 sqft | 4,000 sqft |
| Turnkey range | $368,000–$640,000 | $276,000–$480,000 | $460,000–$800,000 |
| Best for | Families + homesteaders, real shop | Starter shop-house, couple or small family | Working homestead, full 3-bay shop |
The 40×60 (2,400 sqft) is the step below — same 40 ft width, 20 ft shorter. That 800 sqft gap lives in the shop: a 40×60 shop side is a solid 2-bay garage, but it doesn’t carry the RV or project-vehicle bay that the 40×80 does, and it compresses the living side’s mudroom and utility room. If the shop-house concept is right but the household is smaller and the vehicle/equipment list is shorter, the 40×60 is the honest recommendation.
The 50×80 (4,000 sqft) is the step above — same 80 ft run, 10 ft wider. That extra width steps the shop from a 2–3 bay configuration to a full 3-bay layout with serious workshop or equipment-storage capacity. It also widens the living side enough to run rooms side by side rather than end to end, which changes the floor plan geometry. If the household is larger, the equipment list is longer, or the working-homestead use case is the priority, the 50×80 is worth the step up.
Kit or turnkey
Kit or Turnkey: How Most Buyers Build a 40×80
Most buyers at this size choose turnkey because they can’t erect a steel shell themselves. Here’s exactly where the kit ends and the finished home begins.
The shell kit — from $89,600 for the 40×80 — covers the engineered steel frame, roof and wall panels, fasteners, hardware, and delivery to your site. Everything from the slab up is the builder’s scope. Turnkey delivery via our vetted contractor network adds foundation, professional shell erection, electrical, plumbing, HVAC, and full interior finish — coordinated through one process so you’re managing one point of contact, not a dozen subcontractors. Turnkey coverage is available where our contractor network operates; use the quote form to confirm availability in your area.
The process
How Turnkey Delivery Works
Turnkey delivery runs in four stages. We coordinate the vetted contractors at each one, so you manage one process instead of a dozen subcontractors.
FAQ
Frequently Asked Questions
How much does a 40×80 barndominium cost?
The shell kit starts from $89,600 ($28/sqft across the 3,200 sqft footprint). Turnkey — move-in ready, built by our vetted contractor network — starts from $368,000 at the blended national rate of $115–$200/sqft, all-in, with the full range running $368,000–$640,000 depending on finish level, shop configuration, loft add-ons, and your market. See the cost page for a full breakdown of what moves the number.
How many bedrooms can you fit in a 40×80 barndominium?
In the standard shop-house split (~2,000 sqft of living), your plan supports 3 bedrooms and 2 bathrooms with a mudroom, utility room, and open great room. In the all-living configuration (full 3,200 sqft, no shop), your plan supports 4–5 bedrooms and 3 bathrooms with room for a dedicated office or guest suite. A loft over the living side adds a second-floor master suite, bunkroom, or bonus room without changing the footprint.
Can a 40×80 fit a shop, an RV bay, and a full family home?
Yes — that’s the standard shop-house split. The shop side of a 40×80 fits two full-size trucks plus an RV, boat, or project-vehicle bay in a 2–3 bay configuration; the living side carries 3 bedrooms, 2 bathrooms, an open kitchen and great room, utility room, and mudroom. Sidewall height and overhead-door spec are drawn into your plan to match the RV or equipment clearance you need.
What’s the difference between a 40×60 and a 40×80 barndominium?
The 40×80 is 800 sqft larger than the 40×60 (2,400 sqft) — and that difference lives almost entirely in the shop. A 40×60 shop side supports a solid 2-bay garage; the 40×80 adds the RV, boat, or project-vehicle bay and the lateral room for a multi-station workshop. The living side also gains room for a proper mudroom and utility room without compressing the bedroom count.
Can I get a 40×80 as a custom design — not a stock floor plan?
Yes — every plan we produce is custom-designed to your household, site, and intended use. There are no stock floor plans. The shop/living split, sidewall height, overhead-door spec, loft, covered porch, in-law suite, and finish package are all drawn around your requirements from the start.