Accessible one bedroom ADU
A warm, classic cottage-style detached ADU with a surprisingly livable layout. At 785 sq ft, this plan gives you a true “small home” feel—featuring an open living/kitchen great room, two bedrooms, and a full bath, all organized for comfort and privacy.
It’s a strong fit for long-term rental income, multigenerational living, or homeowners who want a backyard home that doesn’t feel like a studio.
Estimated Pricing
- Basic Build (baseline finishes): ~ $299,000
- As-Built With Upgrades: ~ $462,000
- Suggested Selling Price: ~ $532,000 – $556,000
Pricing varies based on site conditions, access, utilities, permitting requirements, and finish selections. Final pricing is confirmed after a site review and scope is defined.
Key seattle DADU features
- 785 sq ft / 2 Bedrooms / 1 Bathroom — ideal for roommates, small families, or a higher-quality rental
- Open living + kitchen great room with space for a dining table and full seating area
- Two true bedrooms placed on opposite sides for better privacy and flexibility
- Full bath with tub/shower (practical for long-term living)
- Efficient, no-wasted-space layout that feels bigger than the square footage
- Timeless “cottage” character that pairs well with traditional homes while still looking clean and updated
What’s Included in the Seattle DADU plan set?
This plan set provides the core drawings needed to define the layout and exterior design so you can move forward with pricing, planning, and permitting.
Typically included:
- Floor plan layout and dimensions
- Exterior elevations
- Core architectural details needed to price and permit the build
Still required for permitting (site-specific):
You’ll still need a site plan, utilities/connection details, and completed permit paperwork based on your jurisdiction’s requirements. We can help identify what’s needed for your lot and coordinate 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.
