Free cabin plan · PDF download
30x40 Barndominium Plans
A 1,200 sq ft three-bedroom, two-bath barndominium floor plan with a central great room, steel siding, 10-foot walls, and an 8-foot front porch on a slab.
Plan specs
- Footprint
- 30' x 40'
- Floor area
- 1200 sq ft
- Porch
- 320 sq ft (8' deep, front)
- Wall height
- 10'
- Roof
- Gable, 4/12 pitch
- Roofing
- Standing-seam metal
- Siding
- Steel wall panels
- Foundation
- Concrete slab
- Rooms
- 3 bedrooms, 2 baths
- Windows / doors
- 11 / 2
- Est. materials
- $41,261
Room sizes
- Bedroom 2
- 11'-10" x 11'-10" (140 sq ft)
- Bath 2
- 11'-10" x 5'-8" (66 sq ft)
- Bedroom 3
- 11'-10" x 10'-10" (128 sq ft)
- Living + kitchen
- 14'-2" x 29'-0" (410 sq ft)
- Primary bedroom
- 12'-4" x 15'-10" (195 sq ft)
- Primary bath
- 12'-4" x 6'-8" (82 sq ft)
- Laundry
- 12'-4" x 5'-10" (72 sq ft)
Every figure here comes from the same engine the 3D builder runs, so it matches what you get when you open the plan.
About this plan
What the 30×40 Barndominium is for.
This is the split-bedroom layout that most 30x40 barndominium floor plans use, because it works. The primary suite takes one end with its own bath and a laundry room behind it, the two secondary bedrooms and the hall bath take the other, and the open great room and kitchen run front to back through the middle, so the two bedroom wings are a whole room apart.
The kitchen sits on the back wall of the great room under its own window, and the laundry has an exterior door, so muddy boots come in there instead of through the living room. Each wing has its own bath, so nobody crosses the house at night.
Most barndominiums are post-frame or steel-frame buildings. This plan draws a conventional stick-framed shell with 10-foot walls and steel wall panels over sheathing, which any framing crew can build. The 30-foot clear span still needs engineered trusses or a beam, so treat the roof framing in the materials list as a budget figure and have a truss supplier size it for your snow load.
Good for
- A full-time family home on rural land
- Bedrooms split to opposite ends of the house for privacy
- A barn look built with ordinary framing crews
The drawings
Elevations, section, and foundation.
The same views that are in the PDF, dimensioned in feet and inches. Download the PDF to print them at letter size.
Materials list
About $41,261 in materials.
Quantities come off the plan's dimensions with a 10 percent waste allowance, priced at typical U.S. retail. This is the shell only: labor, insulation, interior finishes, plumbing, and electrical are not included.
| Item | Qty | Unit | Est. cost |
|---|---|---|---|
| Foundation | $4,332 | ||
| Concrete (ready-mix)4" slab with 5% waste | 16 | CY | $2,400 |
| #4 rebar18" grid | 1,610 | LF | $1,932 |
| Framing | $11,619 | ||
| 2x6 plates (bottom + double top)Treated bottom plate | 463 | LF | $833 |
| 2x6x10 wall studs16" OC | 188 | ea | $1,786 |
| 2x10 headers (doubled)Over window/door openings | 122 | LF | $342 |
| 2x10x30 floor joists16" OC | 36 | ea | $3,024 |
| 2x10 rim joist | 154 | LF | $431 |
| 2x8x30 ceiling joists16" OC | 36 | ea | $2,376 |
| 2x8x18 rafters | 71 | ea | $2,704 |
| 2x10 ridge board | 44 | LF | $123 |
| Sheathing | $4,333 | ||
| 7/16" OSB wall sheathing (4x8) | 39 | sheets | $1,092 |
| 1/2" plywood roof sheathing (4x8) | 47 | sheets | $1,645 |
| 3/4" T&G plywood subfloor (4x8) | 38 | sheets | $1,596 |
| Roofing | $7,088 | ||
| Metal standing seam panels | 1,496 | sqft | $6,732 |
| Roof underlayment (synthetic)400 sqft/roll | 4 | rolls | $200 |
| Drip edge | 156 | LF | $156 |
| Siding | $4,224 | ||
| 29-ga steel wall panelsPBR/R-panel profile, screw-fastened | 1,345 | sqft | $2,959 |
| Steel trim (corners, base, openings) | 410 | LF | $1,025 |
| Housewrap9ft x 100ft rolls | 2 | rolls | $240 |
| Windows & Doors | $3,090 | ||
| WindowsStandard double-hung | 11 | ea | $2,200 |
| Window trim/casing | 11 | sets | $330 |
| Exterior doorsPre-hung exterior | 2 | ea | $500 |
| Door trim/casing | 2 | sets | $60 |
| Interior Walls | $3,340 | ||
| 2x4 plates (bottom + double top) | 354 | LF | $301 |
| 2x4x10 studs16" OC | 132 | ea | $924 |
| 1/2" drywall (4x8)Both faces of the partitions only | 67 | sheets | $1,005 |
| Pre-hung interior doors | 6 | ea | $960 |
| Interior door casing | 6 | sets | $150 |
| Porch | $2,324 | ||
| Deck boardsPressure-treated | 352 | sqft | $1,056 |
| 6x6 porch posts8ft pressure-treated | 8 | ea | $200 |
| 2x8 porch joists16" OC | 282 | LF | $620 |
| Porch railing | 56 | LF | $448 |
| Fasteners & Hardware | $910 | ||
| Nails, screws, joist hangersAssorted construction fasteners | 2,600 | sqft (est.) | $910 |
| Estimated materials total | $41,261 | ||
These are concept drawings for planning and estimating, not engineered or stamped plans. Have a builder or engineer check framing sizes, spans, and connections for your snow, wind, and soil conditions before you order materials.
Common questions
Building the 30×40 Barndominium.
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