650 sq ft 1-Bedroom Detached ADU
Exterior render: contemporary detached ADU with a stepped facade, stucco exterior, and a modern shed roof.
1-bedroom layout: private bedroom, full bath, closet, W&D, open living area, kitchen/dining, and open front porch
Front & Rear Elevation
Left & Right Elevation
| ADU Type | Detached 1-bedroom |
| Total Area | 650 sq ft |
| Footprint | 26' × 25' |
| Ceiling Height | 12 ft |
| Roofline | Shed Roof |
| Exterior Cladding | Beige Stucco Siding |
| Porch | YesOpen Porch |
| Laundry | In-unit W/D |
Estimated build costs vary by location, contractor, and finish level. See our ADU Cost Guide for a full breakdown of what drives ADU construction costs in your state.
This 650 sq ft one-bedroom ADU offers additional room for comfortable everyday living while maintaining a relatively compact footprint. The separate bedroom creates a private sleeping area, and the full bathroom and in-unit washer and dryer provide practical conveniences. The open porch adds an outdoor space for relaxing, giving the design an inviting connection between indoor and outdoor living.
At 26' × 25', this plan has a nearly square footprint that provides flexibility when considering how to position the building on a property. The shed roof gives the exterior a clean, contemporary appearance, while the open porch adds character to the overall design.
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