Accessible one bedroom ADU
A high-function detached ADU over a 2-car garage/shop—built for homeowners who want serious utility and real living space. The Atlas pairs a large garage/shop footprint with a full second-floor home featuring 2 bedrooms and 1.5 baths, making it a strong option for long-term rental income, multigenerational living, or a private guest home with extra storage below.
On the main level, you get an entry zone and flexible bonus space (perfect for a rec room, gym, office, or hobby room), while the living space upstairs stays private, quiet, and separated from the garage.
Estimated Pricing
- Basic Build: ~$312,000
- As-Built With Upgrades: ~$483,000
- Suggested Selling Price: ~$556,000 – $581,000
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
- 1,213 sq ft / 2 Bedrooms / 1.5 Bathrooms — a true “full home” ADU layout
- ADU over a 2-car garage/shop for parking, tools, storage, or a workshop setup
- First-floor bonus space (rec room / flex room) plus a shower + powder room for convenience
- Second-floor open living plan with defined kitchen + living area and room to dine
- Two bedrooms for roommates, small families, office/guest flexibility, or higher rental value
- Separated levels (garage + flex below, living above) for privacy and noise control
- Built-in storage zones (closets + laundry area) designed for real day-to-day living
What’s Included in the Seattle DADU plan set?
This plan set provides the core drawings needed to define the layout, exterior design, and overall construction intent so you can move forward with pricing, planning, and permitting.
Typically included:
- Floor plan layout(s) 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.
