30x40 Barndominium Kit
A 30x40 barndominium kit is a complete small home on one floor: two bedrooms, a bath, and an open kitchen and living room under a clear-span roof. It is also a popular guest house or ranch cabin next to a bigger shop.
- Footprint
- 30′ × 40′
- Floor area
- 1,200 sq ft
- Typical eave
- 10–14 ft
- Clear span
- 30 ft
What a 30x40 barndominium kit costs
Plan on $30K–$90K in materials for a 30x40 (1,200 sq ft). Industry range of $25–$75 per sq ft for barndominium shell materials, applied to this footprint. Interior finish, labor, concrete and site work are separate.
Your exact number depends on the choices on the right. Send us the size, use and build-site zip code and we will send back an engineered price for your site — usually the same business day.
Full cost guide →What moves the price
- Eave heightTaller walls mean longer columns, more steel and bigger doors.
- Doors and windowsCount and size of overhead doors is often the biggest single swing.
- Snow and wind loadsHigh-snow and high-wind counties need heavier trusses and tighter spacing.
- Steel and finishesWoodgrain or textured steel, stone wainscot and pre-finished siding.
- Porches and lean-tosCovered space on a sidewall adds cost, but far less than more building.
- Insulation and linerInterior liner panels and insulation packages for heated space.
What people build with a 30x40
- Two-bedroom home or cabin
- Guest house or in-law suite
- Ranch or hunting cabin
- Garage with living quarters above
Typical doors: Entry doors and residential windows, with an optional garage door on the endwall
Sizing notes from the field
- A 30 ft clear span means interior walls go wherever the floor plan wants them.
- Choose a 10 ft eave for a single story, or 14 ft to fit a loft bedroom.
- A 10–12 ft porch across the 40 ft sidewall adds outdoor living for a fraction of interior cost.
- Stone wainscot and pre-finished siding make a small footprint read as a custom home.
What ships in a 30x40 kit.
- Engineered trussesCustom spans up to 86′ in one piece, designed for your site’s snow and wind loads and built in Wheatland.
- Laminated columnsStraighter than solid posts, with better treatment penetration where the column meets the ground.
- Steel roofing & siding35+ colors, including textured finishes and a woodgrain, backed by a 40-year paint warranty.
- Trim & flashingRidge cap, corner trim, J-channel and drip edge, color-matched to your steel.
- Fasteners & hardwareEvery screw, bolt, bracket and closure strip the build calls for — counted, not guessed.
- Stamped engineeringSite-specific drawings for your county’s loads, ready to hand to the building department.
- Delivered on our trucksOur flatbeds, our drivers, with an onboard forklift to set materials where your crew wants them.
Not included: concrete, site work, labor, insulation and interior finish. We’ll tell you exactly where the package stops before you order.
See every component →30x40 kit questions.
How much does a 30x40 barndominium kit cost?
Using the industry range of $25 to $75 per sq ft for shell materials, a 30x40 barndominium shell runs roughly $30,000 to $90,000. Interior finish, labor, concrete and site work are separate and typically add another 1.5 to 2 times the shell number.
How many bedrooms fit in a 30x40 barndominium?
Two bedrooms and one or two baths with an open kitchen and living area is the common layout. A loft over part of the floor can add a third sleeping area with a taller eave.
Is a barndominium kit a finished house?
No. A barndominium kit is the engineered building shell — structure, roof, walls, trim and hardware. You or your builder finish the interior, insulation, plumbing, electrical and mechanical.
What is included in a 30x40 kit from Western?
Engineered trusses, laminated columns, steel roofing and siding, trim and flashing, fasteners and hardware, framing for doors and windows, and stamped engineering drawings for your site. Concrete, labor, insulation and interior finish are not included.
Do you deliver to my area?
We deliver on our own trucks to Wyoming, Colorado, Montana, South Dakota, Nebraska, Kansas, Idaho, Utah, New Mexico, Texas and Nevada.
Other barndominium kits
Price your 30x40.
Tell us the use, eave height you have in mind and your build-site zip code. We will engineer it for your site and send back a price.
Mon–Thu 7am–5pm, Fri 8am–3:30pm MT