This 2 story ADU plan fits 1,050 sq ft of living space on a compact 24'-7" × 21'-4" footprint. You enter through a 5'-10" × 7'-0" entry into a short ground hall. The hall leads to the stair, a 3'-5" × 7'-0" powder room and the main living space. The 15'-7" × 8'-4" kitchen sits beside the 12'-7" × 10'-8" living room, so cooking and sitting areas share one open zone.
Upstairs, the 6'-8" × 8'-4" stair lands on a 3'-3" × 19'-4" hall that serves the whole level. The primary bedroom measures 11'-11" × 10'-8" and Bedroom 2 measures 11'-11" × 8'-4". The 6'-8" × 5'-5" bathroom and the 6'-8" × 4'-10" laundry open off the same hall. Bedrooms, bath and laundry are all on one floor, and the plan has no garage.
Layout highlights
- Open ground floor pairs a 15'-7" × 8'-4" kitchen with a 12'-7" × 10'-8" living room.
- Powder room at 3'-5" × 7'-0" sits off the ground hall, so guests stay downstairs.
- Primary bedroom is 11'-11" × 10'-8", with Bedroom 2 at 11'-11" × 8'-4".
- Laundry (6'-8" × 4'-10") is upstairs, next to the 6'-8" × 5'-5" bathroom.
- Compact 24'-7" × 21'-4" footprint holds 1,050 sq ft of living space over two levels.
Room sizes
| Room | Level | Size | Area |
|---|---|---|---|
| Stair | 1 | 6'-8" × 8'-4" | 56 sq ft |
| Powder Room | 1 | 3'-5" × 7'-0" | 24 sq ft |
| Entry | 1 | 5'-10" × 7'-0" | 41 sq ft |
| Ground Hall | 1 | 9'-8" × 3'-3" | 31 sq ft |
| Living Room | 1 | 12'-7" × 10'-8" | 134 sq ft |
| Kitchen | 1 | 15'-7" × 8'-4" | 130 sq ft |
| Bathroom | 2 | 6'-8" × 5'-5" | 36 sq ft |
| Laundry | 2 | 6'-8" × 4'-10" | 32 sq ft |
| Stair | 2 | 6'-8" × 8'-4" | 56 sq ft |
| Upper Hall | 2 | 3'-3" × 19'-4" | 62 sq ft |
| Bedroom 2 | 2 | 11'-11" × 8'-4" | 100 sq ft |
| Primary Bedroom | 2 | 11'-11" × 10'-8" | 127 sq ft |
Who this plan suits
This plan suits owners adding a rental, guest house or family unit to a lot where a small footprint matters more than a wide one. It needs a backyard or side-yard area that can take a 24'-7" × 21'-4" building, plus access for utilities and a path to the entry.
How this plan was made
It was generated in AI Architectures Plan Studio from this one-line brief: “Two-story detached ADU on a small footprint: ground floor open kitchen, living and powder room; upstairs 2 bedrooms, bath, laundry, about 1,000 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 2 story ADU plans?
2 story ADU plans describe an accessory dwelling unit built on two levels, which keeps the footprint small and puts more living area on the same lot. This version places the kitchen, living room and powder room on the ground floor. Both bedrooms, the bathroom and the laundry are upstairs.
What affects the cost and lot requirements of this ADU?
The main drivers are the 24'-7" × 21'-4" footprint, the two floors of framing, and the utility runs to the kitchen, powder room, bathroom and laundry. Local setbacks, height limits and ADU rules decide whether the plan fits your lot, so check them with your jurisdiction before building.
Can I change this plan by chat?
Yes. You can describe changes in chat, such as resizing rooms, adding a garage, switching the garage side or adjusting the plan to a narrower lot. The layout is regenerated with the new room sizes and footprint.
How do I use the PDF, DXF and IFC files?
The PDF is for review, permit discussions and sharing with contractors. The DXF opens in CAD software for drafting and site layout. The IFC imports into BIM tools so you can inspect the model in 3D and coordinate with engineers or other design work.