This 900 sq ft ADU plan is a single-story detached backyard unit with two bedrooms and two baths. The footprint measures 28'-7" × 33'-10", and the 900 sq ft of living space is all on one level with no garage. A front porch leads to the living room, which measures 13'-9" × 14'-3".
The kitchen, 11'-7" × 9'-4" with an island, belongs to the main living area, so cooking and sitting share one open zone. An 8'-6" × 7'-6" hall serves the bedrooms, the 5'-9" × 7'-6" hall bath and the 4'-6" × 9'-4" laundry. Bedroom 2 is 9'-8" × 9'-4". The primary bedroom is 11'-7" × 10'-9" and has its own 5'-2" × 6'-0" bath and a 6'-0" × 6'-0" walk-in closet.
Layout highlights
- Living room of 13'-9" × 14'-3" opens off the front porch as the main gathering space.
- Kitchen with island measures 11'-7" × 9'-4" and sits within the open living area.
- Primary suite pairs an 11'-7" × 10'-9" bedroom with a 5'-2" × 6'-0" bath.
- Walk-in closet of 6'-0" × 6'-0" gives the primary bedroom dedicated storage.
- Separate 4'-6" × 9'-4" laundry and a 5'-9" × 7'-6" hall bath serve Bedroom 2.
Room sizes
| Room | Size | Area |
|---|---|---|
| Living Room | 13'-9" × 14'-3" | 196 sq ft |
| Kitchen with Island | 11'-7" × 9'-4" | 108 sq ft |
| Hall Bath | 5'-9" × 7'-6" | 43 sq ft |
| Hall | 8'-6" × 7'-6" | 63 sq ft |
| Bedroom 2 | 9'-8" × 9'-4" | 90 sq ft |
| Laundry | 4'-6" × 9'-4" | 42 sq ft |
| Primary Bedroom | 11'-7" × 10'-9" | 125 sq ft |
| Primary Bath | 5'-2" × 6'-0" | 31 sq ft |
| Walk-in Closet | 6'-0" × 6'-0" | 36 sq ft |
Who this plan suits
This plan suits homeowners who want a two-bedroom, two-bath rental, guest or family unit in the backyard. The lot needs room for a 28'-7" × 33'-10" footprint plus the setbacks, access path and utility connections 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 900 sq ft of living space: 2 bedrooms, 2 baths, open kitchen with island, living, 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 900 sq ft ADU plans?
They describe an accessory dwelling unit with about 900 sq ft of living space, built as a separate home on the same lot as a main house. This version is one story with two bedrooms, two baths, a kitchen with island, laundry and a front porch.
What affects the lot and building cost of this ADU?
The 28'-7" × 33'-10" footprint must fit within your setbacks, and utility runs from the main house or street affect site work. Foundation type, finishes, local permit fees and labor rates also drive the total, so get local quotes.
Can I change this plan by chat?
Yes. You can describe changes in chat, such as resizing or moving rooms, adding a garage on a chosen side, or fitting a narrower or wider lot. The plan is regenerated so the rooms still connect.
How do I use the PDF, DXF and IFC files?
The PDF is for review, sharing and permit discussions. The DXF opens in CAD software for drafting and edits, and the IFC imports into BIM tools. A local designer or engineer should check the plans against your code before construction.