This 550 sq ft ADU plan is a detached, single-level backyard dwelling with one bedroom and one bathroom. The footprint measures 23'-7" × 25'-7". There is no garage, so all 550 sq ft is living space. A porch marks the entry and leads straight into the open main room.
The kitchen with peninsula (10'-4" × 9'-0") sits beside the living room (10'-2" × 13'-7"), so cooking, dining and seating share one space. A short hall (10'-4" × 3'-7") links that space to the bedroom (10'-11" × 9'-8"), the bathroom (6'-4" × 5'-9") and the laundry closet (3'-7" × 5'-9"). Keeping the bedroom and bath off the hall separates sleeping from the daytime rooms.
Layout highlights
- Open kitchen with peninsula, 10'-4" × 9'-0", looks onto the living room.
- Living room measures 10'-2" × 13'-7" and sits next to the kitchen.
- Bedroom of 10'-11" × 9'-8" is reached from a 3'-7" wide hall.
- Laundry closet, 3'-7" × 5'-9", is beside the 6'-4" × 5'-9" bathroom.
- Compact 23'-7" × 25'-7" single-level footprint with a covered porch entry.
Room sizes
| Room | Size | Area |
|---|---|---|
| Kitchen with Peninsula | 10'-4" × 9'-0" | 93 sq ft |
| Living Room | 10'-2" × 13'-7" | 138 sq ft |
| Bedroom | 10'-11" × 9'-8" | 106 sq ft |
| Hall | 10'-4" × 3'-7" | 37 sq ft |
| Laundry Closet | 3'-7" × 5'-9" | 20 sq ft |
| Bathroom | 6'-4" × 5'-9" | 36 sq ft |
Who this plan suits
This plan suits homeowners adding a rental, guest house or space for family in a backyard. It needs a lot with room for a 23'-7" × 25'-7" footprint plus the setbacks and utility access your local 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 550 sq ft of living space: 1 bedroom, 1 bath, open kitchen with peninsula and living, laundry closet, 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 550 sq ft ADU plans?
They are plans for an accessory dwelling unit with about 550 sq ft of living space, built on the same lot as a main house. This one is detached, single-level, with one bedroom, one bath, a kitchen, a living room and a laundry closet.
What affects the lot fit and cost of building this ADU?
The main drivers are the 23'-7" × 25'-7" footprint, local setback and height rules, and the distance to water, sewer and power connections. Foundation type, finishes and local labor rates also change the final cost, so get a local quote.
Can I change this plan by chat?
Yes. You can ask for changes such as a different bedroom size, a moved porch or a narrower footprint for a tighter lot. The plan is regenerated with updated room sizes. Since this unit has no garage, the changes you are most likely to ask for are room layout and lot width.
How do I use the PDF, DXF and IFC files?
The PDF is for reading and sharing the drawings, including with a designer or permit office. The DXF opens in CAD software for editing and site layout. The IFC imports into BIM tools for review and coordination. Local permit requirements vary, so have a licensed professional check the plans before you build.