This detached backyard ADU is a single-level studio with 370 sq ft of living space on a footprint of 27'-7" × 14'-9". The main Studio Living area measures 10'-0" × 12'-10" and serves as the day room. A Covered Entry leads directly into it, so there is no hallway and no wasted circulation.
The Sleeping Alcove (7'-4" × 8'-2") sits off the living area, giving the bed its own nook without a closed bedroom. The Kitchenette (6'-8" × 6'-4") is placed next to the living space and shares a wall with the Full Bath + Laundry Closet (6'-8" × 6'-0"). That shared wall lets the plumbing run together and keeps utility lines short. The plan has one bedroom area, one bath and no garage.
Layout highlights
- Studio Living room at 10'-0" × 12'-10" holds a sofa, table and media wall.
- Sleeping Alcove at 7'-4" × 8'-2" fits a queen bed off the main room.
- Kitchenette at 6'-8" × 6'-4" sits beside the bath to share plumbing.
- Full Bath + Laundry Closet at 6'-8" × 6'-0" combines bathing and washing.
- Covered Entry opens straight into the studio on a 27'-7" × 14'-9" footprint.
Room sizes
| Room | Size | Area |
|---|---|---|
| Sleeping Alcove | 7'-4" × 8'-2" | 60 sq ft |
| Studio Living | 10'-0" × 12'-10" | 128 sq ft |
| Full Bath + Laundry Closet | 6'-8" × 6'-0" | 40 sq ft |
| Kitchenette | 6'-8" × 6'-4" | 43 sq ft |
Who this plan suits
This plan suits homeowners adding a rental, guest suite, home office or space for a relative behind the main house. It needs a rear lot that can fit a 27'-7" × 14'-9" footprint plus the setbacks your local code requires.
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 350 sq ft of living space: studio (no separate bedroom), 1 bath, studio with sleeping alcove, kitchenette, full bath, closet laundry, covered entry.” 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 350 sq ft ADU plans?
They describe a small accessory dwelling unit of roughly 350 square feet with its own kitchen, bath and sleeping area. This version measures 370 sq ft of living space as drawn, laid out as a studio with a sleeping alcove on one level.
What affects the lot and cost of building this ADU?
The main drivers are the 27'-7" × 14'-9" footprint, utility connections to the main house, foundation type and local permit rules. Because the kitchenette and bath share a wall, plumbing runs stay short, but sewer, water and electrical distance from the street still vary by site.
Can I change this plan by chat?
Yes. You can describe changes in chat, such as resizing rooms, moving the entry, or adjusting the footprint for a narrower lot. The plan updates to reflect the new layout, and you can review it before you export.
How do I use the PDF, DXF and IFC files?
The PDF is for reviewing and sharing the layout with family, contractors or your permit office. The DXF opens in CAD software for drafting and site planning, and the IFC imports into BIM tools for coordination. A licensed designer or engineer should confirm the plans meet local code before construction.