ADU Contractors near Mill Creek, WA
Red's Construction & Renovation
Federal Way, WA 98003
38.2 miles
Red's Construction & Renovation serves Federal Way & South King County, WA, specializing in ADU construction including detached, attached, garage conversions & basement units. Costs range from $50K–$300K+. Licensed, insured, transparent pricing.
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Brutsky Builds
800 Bellevue Way Northeast, Bellevue, WA 98004
16.9 miles
Brutsky Builds is a licensed ADU contractor in Bellevue offering full-service accessory dwelling unit construction. Services start from $210,000, covering design, permitting, and build completion in ~6 months.
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Greater Seattle Remodeling
1850 130th Ave NE #1, Bellevue, WA 98005
16.8 miles
Greater Seattle Remodeling builds code-compliant ADUs across the Seattle metro, including detached ADUs, garage conversions, and basement apartments. They match homeowners with vetted contractors for permits, design, and construction.
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Levite Construction CO
5608 17th Avenue Northwest, Seattle, WA 98107
15.6 miles
Levite Construction Co is a Seattle-based family-owned general contractor offering kitchen remodeling, bathroom remodeling, ADU construction, garage conversions, new builds, interior design, and more across the Greater Seattle area.
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Raincap Construction
2315 North 65th Street, Seattle, WA 98103
14.2 miles
Raincap Construction, a Seattle-based family-owned contractor, specializes in ADU and DADU construction. They build backyard cottages, in-law suites, and garage conversions, helping homeowners add living space, rental income, and property value.
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Interbay Construction
1020 108th Avenue Northeast, Bellevue, WA 98004
16.8 miles
Interbay Construction is a Washington State ADU contractor building guest houses, in-law suites, detached ADUs & backyard cottages. Quality materials, clear communication & reliable timelines for every accessory dwelling unit project.
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Seattle ADU Builders
4138 Baker Avenue Northwest, Seattle, WA 98107
15.9 miles
Emerald ADU Builders Seattle specializes in ADU design, permitting, and construction. They build detached ADUs, attached ADUs, and garage conversions, serving Seattle homeowners with quality craftsmanship and transparent pricing.
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Gravity Builders LLC
17422 108th Avenue Southeast, Renton, WA 98055
28.8 miles
Gravity Builders LLC is a licensed ADU contractor and custom home builder in Renton, WA. Specializing in ADU/DADU construction, custom homes, outdoor living spaces, and concrete work, they deliver quality craftsmanship with transparency and integrity.
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Cornerstone Builders LLC
261641 U.S. 101, Sequim, WA 98382
44.2 miles
Cornerstone Builders LLC is a Sequim-based ADU builder serving Washington's North Olympic Peninsula for 40+ years. This certified design-build firm manages all phases—design, permitting, and construction—offering transparent, process-driven ADU solutions.
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Cast Architecture
115 North 36th Street, Seattle, WA 98103
16.2 miles
Cast Architecture specializes in ADU and backyard cottage design in Seattle since 2009. With 80+ projects, their Cedar Cottage is pre-approved by Seattle & Kirkland. Award-winning designs include Widner Cottage and Lichtenstein Studio. Visit castcottages.com.
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Zee Design & Build
570 Kirkland Way, Kirkland, WA 98033
12.9 miles
Zee Design & Build is a Kirkland, WA ADU contractor serving King, Snohomish, Skagit & Island Counties. Offering full-service ADU construction—garage conversions, basement units, backyard cottages & more—since 2012.
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New Image Construction Management
8305 Dallas Avenue South, Seattle, WA 98108
23.7 miles
New Image Construction Management is a Washington State general contractor and building company based in Seattle, WA. With a primary focus of new home construction and renovation of residential and commercial properties.
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Heartwood Builders
1902 North 34th Street, Seattle, WA 98103
16.1 miles
Heartwood Builders is a Seattle ADU contractor specializing in backyard cottages, basement ADUs, and mother-in-law suites. They handle permitting, use sustainable materials, and help homeowners add rental income or family housing.
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Modern ADU Plans
3660 Lavender Ln NE, Bainbridge Island, WA 98110
21.4 miles
Explore pre-designed ADU floor plans from Modern ADU Plans — studio, 1-bed, 2-bed, garage conversions & more. Save time, reduce costs & maximize property value with ready-to-build accessory dwelling unit designs.
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Greenpod Design
1531 West Sims Way, Port Townsend, WA 98368
31.9 miles
Greenpod Design builds custom DADUs in Washington using SIP construction and sustainable materials. They handle permits, ADA-compliant design, and energy-efficient builds. WA law allows up to two ADUs per lot, up to 1,000 sq ft.
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Other cities in Washington
What you need to know
ADU Contractors in Mill Creek, WA: Building in a Master-Planned Community
Mill Creek, Washington is one of the few master-planned communities in the Pacific Northwest, known for its carefully maintained aesthetics, tree-lined streets, and strong homeowner association presence. This unique character means that ADU contractors in Mill Creek must navigate not only Snohomish County and City of Mill Creek zoning regulations but also potential HOA covenants and design standards that can significantly influence accessory dwelling unit projects. Working with an experienced local ADU contractor who understands these layered requirements is essential for a successful build.
Mill Creek ADU Regulations and Zoning Requirements
The City of Mill Creek follows Washington State's updated ADU-friendly legislation, which has expanded homeowner rights to build accessory dwelling units. Under current rules, single-family residential lots in Mill Creek may be eligible for both an attached ADU and a detached ADU (DADU). Key regulatory considerations include:
- Maximum ADU size: Detached ADUs are generally limited to 1,000 square feet or a percentage of the primary dwelling's square footage.
- Setback requirements: Rear and side yard setbacks typically apply, often ranging from 5 to 10 feet depending on the specific zone.
- Height restrictions: Detached ADUs in Mill Creek are commonly limited to one or two stories with maximum height caps.
- Owner-occupancy: Washington State has moved away from mandatory owner-occupancy rules, giving Mill Creek homeowners more flexibility.
- Utility connections: Separate utility hookups may be required, adding to project scope and cost.
Why Hire a Local ADU Contractor in Mill Creek?
Hiring a licensed ADU contractor familiar with Mill Creek means working with someone who understands the city's permitting process through the Community Development Department, as well as the nuances of building in a community where architectural harmony is highly valued. Local contractors are better positioned to coordinate with the city's building officials, submit accurate permit applications, and ensure designs align with neighborhood aesthetics — all of which can speed up approval timelines and reduce costly revisions.
What to Expect During the ADU Construction Process
A qualified Mill Creek ADU contractor will typically guide homeowners through the following steps:
- Site evaluation and feasibility assessment
- Design and architectural planning
- Permit application submission to the City of Mill Creek
- Foundation, framing, and utility rough-ins
- Inspections and final certificate of occupancy
Investing in an ADU in Mill Creek, WA
With Mill Creek's strong property values, proximity to major employers in the Puget Sound region, and excellent schools within the Everett School District, adding an ADU is a smart investment. Whether you're looking to generate rental income, house extended family, or increase your home's resale value, partnering with a skilled ADU contractor in Mill Creek, Washington is the first step toward making your project a reality.