This detached accessory dwelling unit has 1,210 square feet of living space on a single level, with three bedrooms and two baths inside a 47'-11" × 26'-11" footprint. A front porch leads into the main living area, where the living room (19'-10" × 10'-11"), dining area (9'-5" × 10'-11") and kitchen (9'-8" × 10'-11") share the same 10'-11" depth, so the three spaces read as one open room.
A 20'-3" hall, 4'-10" wide, runs from the living area to the bedrooms and keeps them away from the kitchen. The primary bedroom (10'-1" × 13'-7") has its own bath (6'-4" × 7'-0") and a walk-in closet (6'-4" × 5'-5"). Bedroom 2 (11'-11" × 8'-4") and Bedroom 3 (10'-9" × 8'-4") share the hall bath (5'-2" × 8'-4"). The laundry room (8'-0" × 4'-10") is off the same hall.
Layout highlights
- Open living, dining and kitchen share one 10'-11" depth, with a 19'-10" long living room.
- Primary suite groups a 10'-1" × 13'-7" bedroom, 6'-4" × 7'-0" bath and walk-in closet.
- Bedrooms 2 and 3 measure 11'-11" × 8'-4" and 10'-9" × 8'-4", sharing one hall bath.
- A 20'-3" × 4'-10" hall links all three bedrooms to the main living area.
- Laundry (8'-0" × 4'-10") sits off the hall, near the bedrooms and the hall bath.
Room sizes
| Room | Size | Area |
|---|---|---|
| Living Room | 19'-10" × 10'-11" | 217 sq ft |
| Dining | 9'-5" × 10'-11" | 104 sq ft |
| Kitchen | 9'-8" × 10'-11" | 106 sq ft |
| Primary Bath | 6'-4" × 7'-0" | 45 sq ft |
| Walk-in Closet | 6'-4" × 5'-5" | 34 sq ft |
| Primary Bedroom | 10'-1" × 13'-7" | 137 sq ft |
| Hall | 20'-3" × 4'-10" | 98 sq ft |
| Laundry | 8'-0" × 4'-10" | 39 sq ft |
| Bedroom 3 | 10'-9" × 8'-4" | 90 sq ft |
| Hall Bath | 5'-2" × 8'-4" | 43 sq ft |
| Bedroom 2 | 11'-11" × 8'-4" | 100 sq ft |
Who this plan suits
This plan suits owners adding a rental, multigenerational home or guest house behind an existing house, where three bedrooms are needed on one level. The long, narrow 47'-11" × 26'-11" footprint needs a backyard at least that size, plus the setbacks your local ADU rules require.
How this plan was made
It was generated in AI Architectures Plan Studio from this one-line brief: “Detached backyard ADU (accessory dwelling unit) with about 1200 sq ft of living space: 3 bedrooms, 2 baths, open kitchen, living and dining, laundry, porch.” 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 1200 sq ft ADU plans?
They describe a detached accessory dwelling unit with roughly 1,200 square feet of living space. This version measures 1,210 sq ft on one level and has 3 bedrooms, 2 baths, a full kitchen, laundry and a front porch, so it works as a complete separate home.
What affects the lot fit and cost of this ADU?
The 47'-11" × 26'-11" footprint must fit within your setbacks, lot coverage limits and any required spacing from the main house. Cost depends on your location, site access, utility connections to the main property, foundation type and finish level, so get local quotes before committing.
Can I change this plan by chat?
Yes. You can ask for changes such as a different room count, swapping or resizing rooms, or a narrower or wider footprint to suit your lot. The plan is regenerated with updated room sizes and a new set of files.
How do I use the PDF, DXF and IFC files?
The PDF is for reviewing the layout and sharing it with family, contractors or your permit office. The DXF opens in CAD software for editing and drafting, and the IFC imports into BIM tools. Local permits typically also need drawings stamped by a licensed professional.