Are Barndominiums Cheaper to Build Than a House in Minnesota?
A barndominium is often described as the cheap way to build a house. The numbers support a narrower claim. In NAHB's 2024 survey of builders, the frame and the exterior shell together are about 30% of what it costs to build an average new home, and that is the part a steel or pole barn building changes. The other 70%, from the foundation to the kitchen to the furnace, is the same list whatever holds up the roof, and in Minnesota it includes a frost footing depth, a snow load and a radon system set by state rule for every new home. This guide compares the two line by line, using NAHB's breakdown and the Census Bureau's 2025 prices for the Midwest, which includes Minnesota. It is published data, not our pricing.
Figures below are industry data from cited third-party sources, not a quote from Minnesota Barndominium Builders. Every project is priced individually.
Bottom Line Up Front
- A barndominium can save money in the shell. Framing (16.6%) and exterior finishes (13.4%) are about 30% of an average new home's construction cost in NAHB's 2024 survey. Interior finishes and the plumbing, electrical and HVAC systems, about 43%, cost the same in either building.
- Custom building is not cheap building. In the Census Bureau's 2025 Midwest figures, houses built on the owner's own land had a median contract price of $194.09 per square foot, while builder spec houses sold at a median of $160.00, both without land.
- Minnesota's rules treat a barndominium as the home it is: the same county frost footing depth, ground snow load, passive radon system and residential energy code apply to both, so none of those lines shrink.
Published cost figures
Third-party and government figures, each with its source. None of them is a quote, and none of them is ours.
| Measure | Range | Source |
|---|---|---|
| Contractor-built houses on the owner's land, Midwest region, started in 2025: median to average contract price (land excluded) | $194–$202 per sq ft | U.S. Census Bureau, Characteristics of New Housing 2025, Median and Average Contract Price per Square Foot of New Contractor-Built Single-Family Houses Started: Midwest median $194.09, average $202.13 (read 27 Sep 2026) — https://www.census.gov/construction/chars/xls/contractpricesqft_cust.xls |
| Detached new houses sold by builders, Midwest region, 2025: median to average sales price (lot excluded) | $160–$170 per sq ft | U.S. Census Bureau, Characteristics of New Housing 2025, Median and Average Price per Square Foot of Floor Area in Detached New Single-Family Houses Sold: Midwest median $160.00, average $169.78 (read 27 Sep 2026) — https://www.census.gov/construction/chars/xls/soldpricesqft_cust.xls |
| Average construction cost alone (no lot, overhead, marketing or profit), national builder survey, 2024 | $162 per sq ft | NAHB, Cost of Constructing a Home 2024 (January 2025): average construction cost $428,215, about $162 per square foot; national averages only (read 27 Sep 2026) — https://www.nahb.org/-/media/NAHB/news-and-economics/docs/housing-economics-plus/special-studies/2025/special-study-cost-of-constructing-a-home-2024-january-2025.pdf |
| Average permit valuation per new single-family home authorized in Minnesota, 2025 (structure only, as declared on the permit) | $373,100 per home | U.S. Census Bureau, Building Permits Survey, annual 2025 state data: Minnesota 1-unit valuation $4,807,806 thousand across 12,886 units, about $373,100 each (arithmetic; read 27 Sep 2026) — https://www.census.gov/construction/bps/xls/stateannual_202599.xls |
What actually moves the number
The shell: where savings live
NAHB's 2024 survey puts framing, trusses and sheathing at 16.6% of an average home's construction cost and exterior finishes (siding, roofing, windows and doors) at 13.4%. A plain rectangular steel or pole barn building can cost less on those lines than a stick-framed house with many corners and rooflines.
The inside: no savings
Interior finishes are 24.1% of construction cost in NAHB's survey and the plumbing, electrical and HVAC rough-ins 19.2%. Cabinets, flooring, drywall, fixtures and mechanical systems cost the same whether the walls are steel, posts or studs.
The ground: set by the county
Foundations are 10.5% of construction cost in NAHB's survey. In Minnesota the minimum frost footing depth is 5 feet in Zone I counties and 3-1/2 feet in Zone II counties (Minn. R. 1303.1600), for a barndominium exactly as for a house.
The shop: cheap square feet
The clearest saving is square footage that is not finished living space. A shop under the same roof needs a slab, walls, a roof and doors but skips most of the 43% of construction cost that NAHB attributes to interior finishes and systems.
Where a Barndominium Can Cost Less Than a House
The savings are real, but they sit in specific lines of the budget.
A simple shell
Framing and exterior finishes are about 30% of an average new home's construction cost in NAHB's 2024 survey. A barndominium is usually one rectangle under one roof, with long clear spans and few corners, which keeps framing, roofing and siding simpler than a house with dormers, hips and bump-outs. A pole barn home or steel building takes that further.
Shop space under the same roof
If you need a heated shop or garage anyway, putting it under the barndominium's roof shares one foundation, one roof and one set of end walls. The shop square footage skips most interior finishes and systems. A shouse is designed around that.
Building on land you own
In NAHB's 2024 survey the finished lot is 13.7% of an average new home's sales price, builder profit 11.0% and sales commission 2.8%. Building on land you already own with a contractor you hire takes the lot purchase out of the comparison, though you still pay for the contractor's overhead and margin inside the contract price.
Where It Costs the Same as a House
Most of a home's cost is inside the walls and under the floor.
Interior finishes and systems
NAHB's 2024 survey puts interior finishes at 24.1% of construction cost (cabinets and countertops 4.5%, flooring 3.6%, drywall 3.3%) and the plumbing, electrical and HVAC rough-ins at 19.2%. None of those depend on the frame. Licensed trade contractors handle plumbing, electrical and HVAC, and Minnesota's electrical and plumbing rules apply statewide.
Foundation and frost
Foundations are 10.5% of construction cost in NAHB's survey. Minnesota's frost rule sets the same minimum footing depth for a barndominium as for any house in the county: 5 feet in Zone I and 3-1/2 feet in Zone II, unless a soils engineer shows otherwise (Minn. R. 1303.1600).
Septic, well and site work
A rural lot needs a septic system and well whatever you build on it. Scott County puts an average mound at about $23,000 to $30,000 and a gravity trench system at about $18,000, and the Minnesota Department of Health charges $325 to file a new well. See site preparation.
Insulation for the climate
Minnesota's residential energy code (Minn. R. ch. 1322) applies to a barndominium as it does to any home. Insulation is only 1.6% of construction cost in NAHB's survey, but a steel shell has to be detailed to avoid cold spots and condensation, which is design work a stick-framed house does not need.
Custom vs Spec: What the Census Numbers Say
The comparison people make is often a custom barndominium against a house they could buy. The Census Bureau measures both.
Custom houses on owners' land cost more per square foot
In the Census Bureau's 2025 Midwest figures, contractor-built houses on the owner's own land had a median contract price of $194.09 per square foot and an average of $202.13. Detached new houses sold by builders had a median of $160.00 and an average of $169.78. Both exclude land. Building one house at a time, to your own plan, costs more per square foot than buying one of many.
So compare like with like
A fair comparison sets a custom barndominium against a custom house on the same land, not against a subdivision spec home. Against a custom house, the barndominium's saving is in the shell and in any shop space. Against a spec home, the spec home may win on price per square foot and lose on acreage, shop space and layout.
What Minnesota's new homes were valued at
Minnesota permitted 12,886 new single-family homes in 2025 with a total declared valuation of $4.81 billion, according to the Census Building Permits Survey, or about $373,100 per home for the structure. That is a useful check on any per-square-foot claim, barndominium or house.
Appraisal, Financing and Resale
The build cost is only half of the comparison; what the finished home is worth to a lender matters too.
The loan follows the appraisal
For a single-closing construction-to-permanent loan sold to Fannie Mae, the loan-to-value ratio is calculated against the "as completed" appraised value of the lot and improvements (Fannie Mae Selling Guide B5-3.1-02). Where few barndominiums have sold nearby, the appraiser has fewer direct comparisons to work from, so talk to the lender before you finalise the design. The financing guide covers the loan types.
Resale value
No public data source tracks barndominium resale prices in Minnesota separately from other homes. An appraiser values a home from comparable sales, so a barndominium with a finished interior comparable to local houses has more to be compared with than one that lives like a shop with rooms.
The honest answer
A barndominium is cheaper than a comparable custom house when the design keeps the shell simple and puts shop space under the same roof. It is not a way around Minnesota's foundation, snow, radon, energy, septic or well costs, which are the same for any home. The barndominium cost guide has the full figures.
Reading this because you are weighing a build? The next step is a plan drawn for your program.
What's different about Minnesota
A barndominium is a home under Minnesota's code
The State Building Code's agricultural-building exemption does not cover a barndominium, because a home is not a building designed and used to house farm implements, livestock or agricultural products (Minn. Stat. §§ 326B.103, subd. 3, and 326B.121, subd. 1). Budget for it as a house.
Snow load is set by county, for every roof
Minnesota sets the ground snow load at 60 pounds per square foot in 29 listed counties and 50 in all others (Minn. R. 1303.1700). A barndominium's wide clear-span roof is designed from that figure, so the roof steel or trusses cost more in the north whichever kind of building you choose.
Radon and energy apply to both
Every new Minnesota home needs a passive radon control system (Minn. R. 1303.2400 to 1303.2402), and Minnesota's residential energy code (Minn. R. ch. 1322) sets insulation levels for its cold climate zones. A steel shell needs its own insulation and vapor-control detailing to meet the same code a stick-framed house meets.
Where the code is enforced
The State Building Code is the construction standard everywhere in Minnesota, but permits and inspections happen only where a city, township or county has adopted it (Minn. Stat. § 326B.121). That changes who checks the work, not what the home should cost to build properly.
Pros and cons, honestly
Pros
- A simple rectangular shell can cost less in framing, roofing and siding, which together with windows and doors are about 30% of construction cost in NAHB's survey.
- Shop or garage space under the same roof shares one foundation and roof, and skips most interior finishing.
- Wide clear spans give an open floor plan without interior bearing walls.
- Building on land you own takes the lot purchase out of the comparison.
Cons
- Interior finishes and mechanical systems, about 43% of construction cost, cost the same as in any house.
- Minnesota's frost footing depth, snow load, radon and energy rules apply in full, so none of those lines shrink.
- A steel shell needs careful insulation and vapor-control design for a Minnesota winter.
- Fewer nearby barndominium sales can make appraisal and resale comparisons harder.
Are barndominiums cheaper to build than a house in Minnesota?
How much cheaper is a barndominium per square foot?
Is it cheaper to buy a new house than build a barndominium?
Do barndominiums cost less to insulate and heat in Minnesota?
Does a barndominium need the same foundation as a house in Minnesota?
Do barndominiums hold their value?
Where is the biggest saving in a barndominium?
Questions answered? Tell us what you want to build and we will put real numbers against it.
Sources
- NAHB — Cost of Constructing a Home, 2024 (Eric Lynch, January 20, 2025) — Table 1: sales price and construction cost breakdowns. National averages. Read 27 Sep 2026.
- U.S. Census Bureau — Median and Average Contract Price per Square Foot of New Contractor-Built Single-Family Houses Started (Characteristics of New Housing, 2025) — Midwest 2025: median $194.09, average $202.13 per sq ft. Read 27 Sep 2026.
- U.S. Census Bureau — Median and Average Price per Square Foot of Floor Area in Detached New Single-Family Houses Sold (Characteristics of New Housing, 2025) — Midwest 2025: median $160.00, average $169.78. Read 27 Sep 2026.
- U.S. Census Bureau — Building Permits Survey, annual 2025 state data — Minnesota 1-unit: 12,886 units, valuation $4,807,806 thousand. Read 27 Sep 2026.
- Fannie Mae Selling Guide — B5-3.1-02, Conversion of Construction-to-Permanent Financing: Single-Closing Transactions — LTV calculated on the "as completed" appraised value. Read 27 Sep 2026.
- Scott County (Minnesota) — FAQ: How much does a new system cost? — Average mound about $23,000 to $30,000; gravity trench about $18,000. Read 27 Sep 2026.
- Minnesota Department of Health — Wells and Borings fee schedule — Water-supply well notification: $325. Read 27 Sep 2026.
- Minn. Stat. § 326B.103 — Definitions (agricultural building)
- Minn. Stat. § 326B.121 — Compliance with State Building Code
- Minn. R. 1303.1600 — Footing Depth for Frost Protection
- Minn. R. 1303.1700 — Ground Snow Load
- Minn. R. 1303.2400 — Purpose and Scope (passive radon control)
- Minn. R. 1322.0010 — Minnesota Energy Code, residential provisions
Keep reading
The pages that answer the next question this one raises.
Barndominium cost in Minnesota
Census price per square foot, a size table, land, septic and frost-footing costs.
Read itAre barndominiums worth it?
The trade-offs beyond the build price.
Read itShouses
A home and a shop under one roof.
Read itStart the survey
Tell us what you want to build and we will price it against your land.
Read itWant a real number instead of a range?
Start the survey and tell us about your land and what you want to build. Include the county and township, or the parcel number if you have it, because in Minnesota the zoning, the shoreland rules, the septic system and the well can change the budget more than the building does. The survey costs nothing.