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Cedar Groove – 800 SF

Accessible one bedroom ADU

A bright, efficient two-bedroom detached ADU designed to feel open, comfortable, and easy to live in. Cedar Grove features a spacious great-room layout with a full kitchen, dining area, and living room—plus two true bedrooms and a full bath, all thoughtfully arranged to minimize wasted space.

With a welcoming front porch and a rear patio for outdoor living, this plan is a great fit for long-term rental income, multigenerational living, or homeowners who want a backyard home that feels complete—without going oversized.

Estimated Pricing

  • Basic Build: ~$206,000
  • As-Built With Upgrades: ~$319,000
  • Suggested Selling Price: ~$367,000 – $383,000+

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

  • 800 SF / 2 Bedrooms / 1 Bathroom — ideal for roommates, small families, or a higher-quality rental
  • Open living + kitchen + dining layout with room to relax and entertain
  • Kitchen with island for prep space and everyday function
  • Dedicated laundry tucked into the plan for convenience
  • Full bath plus a separate tech/mech space for practical utility
  • Front porch + rear patio for indoor/outdoor living
  • Smart layout with real storage (bedroom closets + additional interior storage)

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.

Cedar Groove – 800 SF

Package details

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Project type
Family
Size
Large ADU (700 sq ft)
No. of rooms
2
No. of baths
1 BA
ADU type
Luxury
Notable
Furnished
Location (state)
Washington
Structure
From the mudsill up, this ADU includes a complete, code-compliant structural shell: engineered floor and roof systems, all interior and exterior framing, required structural hardware, and full OSB wall sheathing installed to current building standards.
Included in the quote to support permitting and construction requirements. Final plans and engineering scope may vary based on site conditions, jurisdiction, and project-specific needs.
Hardie 7-1/4″ smooth lap siding with 5/4″ x 4″ trim at openings and open soffits.
Black asphalt shingle roof installation (per selection) with 15-year warranty.
Prime Windows – Series 9000.
6’8″ insulated fiberglass exterior door with partial glass, prepped for handle + deadbolt (black factory-finished).
PEX supply and ABS drain rough-in, plus one exterior cold-water hose bib located outside the bathroom.
One (1) mini-split system serving two (2) zones, kitchen and bathroom exhaust ventilation, and one (1) in-wall electric heater in the bathroom.
125A or 200A service (as available from the main home), standard wiring/outlets, and code-required AFCI/GFCI protection.
Eight (8) recessed lights, two (2) wall-mounted fixtures, and three (3) ceiling-mounted fixtures.
Fiberglass insulation meeting the current Washington State Energy Code (2025). Optional upgrade: AeroSeal (if requested).
Code-compliant drywall installation with light-to-medium orange peel texture and square corner bead throughout.
Hollow-core 1- or 2-panel interior doors with standard casing, base, and window sills.
Craftsman-style cabinetry with color selection from United Signature showroom samples.
Kingmore Plumbing builder selections (Marcato line for faucets), standard single-control shower system, and appliances per United Signature design package.
LVP throughout (showroom selection). If applicable: main level/stairs LVP and second-floor carpet.
Up to three (3) exterior colors, one (1) neutral interior wall/ceiling color, and white millwork + interior doors.
Wire shelving: four (4) rows in pantry, one (1) row in closet, and one (1) shelf above washer/dryer.
Final grading and cleanup to meet code within five (5) feet of the foundation perimeter.

How DADU will look like

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Let us help you to choose the best package according to your requirements.

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NOTE: Permitting can take several months — secure your spot now to be ready for 2026 builds.

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