This one-story barndominium fits an 80'-0" × 40'-0" rectangle and holds 2,300 sq ft of living space, not counting the shop. The 40x20 ft shop/garage takes one end of the footprint. The living area takes the rest. A covered porch sits outside the rectangle, so the main roof stays a simple gable.
The entry sequence runs from the foyer (6'-4" × 10'-4") to the great room (23'-3" × 19'-6"), which opens to the kitchen with island (10'-1" × 18'-2") and the dining area (8'-10" × 18'-2"). A pantry (7'-2" × 8'-0"), laundry (7'-2" × 9'-9") and mudroom (7'-2" × 8'-10") sit between the living space and the shop. Three bedrooms, each about 9'-5" × 13'-11", open off a 29'-0" bedroom hall. The primary suite sits apart from them.
Layout highlights
- Great room measures 23'-3" × 19'-6" and opens directly to the kitchen island and dining area.
- Kitchen (10'-1" × 18'-2") shares its length with the 8'-10" × 18'-2" dining space.
- Mudroom, laundry and pantry, each about 7'-2" wide, form a service zone beside the shop.
- Primary suite combines a 10'-1" × 19'-6" bedroom, 6'-0" × 10'-0" walk-in closet and 8'-2" × 11'-3" bath.
- Three secondary bedrooms of about 9'-5" × 13'-11" share a 29'-0" × 3'-10" hall and two baths.
Room sizes
| Room | Size | Area |
|---|---|---|
| Walk-in Closet | 6'-0" × 10'-0" | 60 sq ft |
| Bath 3 | 6'-0" × 9'-1" | 55 sq ft |
| Primary Bedroom | 10'-1" × 19'-6" | 197 sq ft |
| Primary Bath | 8'-2" × 11'-3" | 92 sq ft |
| Bath 2 | 8'-2" × 7'-10" | 64 sq ft |
| Great Room | 23'-3" × 19'-6" | 453 sq ft |
| Bedroom Hall | 29'-0" × 3'-10" | 112 sq ft |
| Bedroom 2 | 9'-4" × 13'-11" | 129 sq ft |
| Bedroom 4 | 9'-5" × 13'-11" | 131 sq ft |
| Bedroom 3 | 9'-5" × 13'-11" | 131 sq ft |
| Dining | 8'-10" × 18'-2" | 160 sq ft |
| Kitchen with Island | 10'-1" × 18'-2" | 183 sq ft |
| Foyer | 6'-4" × 10'-4" | 66 sq ft |
| Laundry | 7'-2" × 9'-9" | 70 sq ft |
| Mudroom | 7'-2" × 8'-10" | 63 sq ft |
| Pantry | 7'-2" × 8'-0" | 57 sq ft |
| Shop / Garage (40x20 ft) | 21'-5" × 31'-2" | 666 sq ft |
Who this plan suits
This plan suits households that want four bedrooms on one level and a working shop or garage under the same roof. It needs a lot at least 40 ft wide plus setbacks, with enough depth for the 80 ft length and the covered porch.
How this plan was made
It was generated in AI Architectures Plan Studio from this one-line brief: “Barndominium on a 40 x 80 ft rectangular footprint, one story: 4 bedrooms, 3 baths, open great room with kitchen island and dining, laundry, and a 40 x 20 ft shop/garage inside the same rectangle, covered porch outside the rectangle, about 2,400 sq ft of living space.” An AI architect drafted the room program, a layout solver placed every wall and door, and the plan was checked automatically for room sizes, circulation and daylight. The same project produced the PDF sheets, layered DXF, IFC model and 3D model you can download above.
Frequently asked questions
What are 40x80 barndominium floor plans?
They are barndominium layouts built on a 40 ft by 80 ft rectangular footprint, usually a single story under a gable roof. This version gives 2,300 sq ft of living space plus a 40x20 ft shop or garage inside the same rectangle, with the porch added outside it.
What affects the lot and building cost of this plan?
The 80'-0" × 40'-0" footprint sets the minimum lot width and depth once setbacks are added. Cost depends mainly on the foundation, the shop slab and door size, the three bathrooms, and your local labor and material rates. A local builder should price it from the final drawings.
Can I change this plan by chat?
Yes. You can describe changes in chat, such as moving the shop to the other end, swapping a bedroom for an office, or narrowing the footprint for a tighter lot. The layout is regenerated so the rooms still connect, and you can review the updated drawings before exporting.
How do I use the PDF, DXF and IFC files?
The PDF is for review, printing and sharing with a builder or lender. The DXF opens in CAD software for further drafting or site layout. The IFC loads into BIM tools for coordination with structural and MEP work. Local code review and engineering are still needed before permit submission.