Accessible one bedroom ADU
A compact, well-designed 1-bedroom detached ADU that’s easy to place on a wide range of lots—without feeling cramped inside. The layout is efficient and livable, with an open living/kitchen area, a true bedroom, and smart storage built in throughout.
With a clean, timeless exterior and a straightforward footprint, this design is a strong fit for homeowners who want a backyard home for rental income, multigenerational living, or a dedicated guest space—while keeping the build practical and predictable.
Estimated Pricing
- Basic Build (baseline finishes): ~ $180,000
- As-Built With Upgrades: ~ $279,000
- Suggested Selling Price: ~ $321,000 – $335,000
Pricing varies based on site conditions, utilities, access, permitting requirements, finish level, and selections. Final pricing is confirmed after a site review and scope is defined.
Key seattle DADU features
- 550 SF / 1 Bed / 1 Bath compact layout designed for comfortable everyday living
- Open living + kitchen concept that feels bright and spacious
- Walk-in closet (WIC) for real storage (not just a reach-in)
- Dedicated pantry + stacked laundry integrated into the plan for convenience
- Simple gable roof form and clean exterior lines that work across many home styles
- Flexible finish options for siding, trim, and color to match the main house or create contrast
What’s Included in the Seattle DADU plan set?
This plan set gives you a solid, buildable foundation to move forward with a detached ADU—including the key drawings needed to define the design, layout, and exterior appearance.
Typically included:
- Floor plan layout and dimensions
- Exterior elevations
- Core architectural details required to price and permit the build
Still required for permitting (site-specific):
Every property is different, so you’ll still need items like a site plan, utilities/connection details, and completed permit paperwork based on your jurisdiction’s requirements. We can help you identify what’s needed for your lot and coordinate the next steps.
Exclusions
Under United Signature / Signature Build, site preparation, utilities, foundation work, and any required drainage, hardscape, fire suppression, or flame-retardant systems are not included in the base package price. These items, along with applicable sales tax, will be evaluated and itemized separately in your detailed cost breakdown after our team reviews the specific conditions and requirements of your property. Any visual renderings or illustrations may show optional features or upgrades that are not part of the standard package offering. For complete and accurate information on what is included, please refer to the written specifications and scope of work provided for your project.
