A 40×40 barndominium gives you 1,600 square feet on the main floor — the most affordable footprint that still lives like a real house. It’s the size that makes barndominiums so appealing in the first place: a comfortable two- or three-bedroom home, a fast build, low utility bills, and a total cost that’s genuinely attainable. It fits on smaller lots, and because the numbers are lower across the board, it’s often the easiest size to finance.
This guide covers what a 40×40 costs to build in 2026, the best floor plans you can buy today, smart ways to lay out 1,600 square feet, and how to finance it.
How much does a 40×40 barndominium cost?
The figures below come from our barndominium cost guide, where you’ll find the full breakdown and a calculator. Here’s how a 40×40 (1,600 sq ft) shakes out in 2026:
| Build type | Cost per sq ft | 40×40 (1,600 sq ft) |
|---|---|---|
| Kit materials only | $20 – $35 | $32,000 – $56,000 |
| Shell, erected | $30 – $50 | $48,000 – $80,000 |
| Finished — standard finish | $80 – $120 | $128,000 – $192,000 |
| Finished — high-end | $160+ | $256,000+ |
Because it’s the smallest common size, the 40×40 is where sweat equity pays off most. A steel or SIP kit gets you a dried-in shell for well under six figures; from there, how much you finish yourself decides where you land. Most owner-directed 40×40 builds come in around $128,000–$192,000 at a standard finish — attractive numbers for a brand-new, low-maintenance home.
Best 40×40 barndominium floor plans
Here are three of the most popular ways to use 1,600 square feet — from an all-living layout to a home with an attached garage. All are complete, buildable plan sets, and most 40×40 designs land in the 2-bedroom to 3-bedroom range.
PL-62323 Elias — 3 bed / 2.5 bath
1,600 sq ft heated · 40’×50′ · single story · all living space · rear covered porch · $849.99
The purest 40-foot-wide plan of the group. Elias puts all 1,600 square feet into living space — three bedrooms and two and a half baths in an efficient open layout, with a covered back porch. If you want maximum house for the footprint and don’t need an attached garage, this is it.
PL-64010 Westbury — 3 bed / 2 bath + 2-car garage
1,600 sq ft heated · 50’×52′ · single story · 768 sq ft attached 2-car garage · front & rear porches · 10′ ceilings · $849.99
The best of both worlds. Westbury keeps a full 1,600 sq ft of open-concept living and adds an attached two-car garage, wrapped with front and rear porches. Ten-foot ceilings make the interior feel far larger than the number suggests — a great everyday family plan.
PL-69201 Timothy — 2 bed / 2 bath, multi-gen layout
1,610 sq ft heated · single story · 656 sq ft garage · central utility room · $849.99
A clever flexible plan. Timothy centers a garage and utility core with living space to either side — well suited to multi-generational living, a rental side, or a home-plus-guest-quarters setup. Two comfortable bedrooms with room to adapt.
Want more options? See all 1,600 sq ft plans → or browse our 1,200+ floor plans.
Popular 40×40 layout ideas
Sixteen hundred square feet rewards efficient design. The best 40×40 plans avoid wasted hallways and let a few spaces do double duty.
Open-concept core. Combine kitchen, dining, and living into one great room so the whole footprint feels open. The single most effective move for making 1,600 sq ft live large.
Two- or three-bedroom split. Keep bedrooms compact and grouped, with a shared bath, to leave the maximum area for living space — the Elias approach.
Add a loft. A 40×40 with taller sidewalls can carry a partial second-floor loft, adding roughly 400–600 sq ft of bonus space — a bedroom, office, or playroom — without enlarging the footprint.
Garage or living? The biggest 40×40 decision is whether to give up interior space for an attached garage (Westbury) or keep it all as living area (Elias). If you need a workshop, consider a detached building instead so you don’t shrink the house.
Advantages and disadvantages of a 40×40 barndominium
Advantages
- The lowest total cost of any common barndominium size
- Low heating, cooling, and maintenance bills
- Fits smaller lots and tighter budgets
- Fast to build and often the easiest size to finance
- Plenty for a couple, a small family, or a downsizer
Disadvantages
- Tight for large families without adding a loft or second story
- An attached garage meaningfully reduces living space
- Less room for a dedicated shop under the same roof
Other costs to consider
Beyond the kit and finishes, budget for land, site prep and a slab (plus septic and a well on rural land), utility hookups, and interior finishes like flooring, cabinets, and HVAC. These apply at every size — our cost guide breaks them down line by line.
Financing a 40×40 barndominium
The smaller total price makes a 40×40 one of the more financeable barndominiums, but you still want a lender who understands the structure type. Construction-to-permanent loans, USDA Rural Development loans (with little or nothing down on eligible rural land), VA loans, and Farm Credit lenders are all common routes. Work with an appraiser who has valued barndominiums before. See our financing guide for the full process. (General information, not financial advice.)
Other popular barndominium sizes
Need a little more room, or want to compare? Browse the neighbors:
- 30×40 barndominium (1,200 sq ft) — the smallest common footprint
- 40×50 barndominium (2,000 sq ft) — a step up in living space
- 40×60 barndominium (2,400 sq ft) — the most popular size
- See all barndominium sizes →
40×40 barndominium FAQ
How much does a 40×40 barndominium cost? At a standard finish, a 40×40 typically runs $128,000–$192,000 in 2026 ($80–$120 per sq ft), up to $256,000+ for high-end. The shell alone is $48,000–$80,000 erected ($32,000–$56,000 for kit materials only). See our cost guide.
How many square feet is a 40×40 barndominium? A 40×40 barndominium is 1,600 square feet on the main floor. Adding a loft or second story can push livable space to roughly 2,000–2,200 sq ft.
How many bedrooms fit in a 40×40 barndominium? Comfortably two to three bedrooms. Efficient plans fit three bedrooms and two baths in 1,600 sq ft; adding a loft can make room for a fourth.
Is a 40×40 barndominium big enough to live in? For a couple, a small family, or a downsizer, yes — 1,600 sq ft is a comfortable full-time home. Larger families usually step up to a 40×50 or 40×60.
Can I get a floor plan for a 40×40 barndominium? Yes — dozens of ready-to-build 1,600 sq ft plans, including the three above, start around $850 and can be customized to your lot.
Ready to build your 40×40 barndominium?
Start with a floor plan — pick a ready-to-build 40×40 design and customize it. Browse 1,600 sq ft plans →
Work out your budget — see our full cost guide →
Compare your options — a stock plan, a prefab SIP shell, or a steel kit. Get started →
This page is for general informational purposes and isn’t a substitute for confirming requirements with your county building and zoning office, a licensed contractor, or a mortgage professional. Costs and local ordinances change — verify current requirements for your parcel before you build.
