ADU Contractors near Mill Creek, WA
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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Northwest ADU
1201 Pacific Avenue, Tacoma, WA 98402
43.6 miles
Northwest ADU is a full-service ADU contractor in Western Washington specializing in detached ADUs, garage conversions, and basement conversions. Serving Pierce, King, and Snohomish Counties, projects range from $180K–$350K+, taking 6–10 month... read more
Chapman Projects
4225 335th Place Southeast, Fall City, WA 98024
25 miles
Chapman Projects offers ADU design and construction in Seattle, Bellevue, and King County. With 20+ years of experience, they provide custom accessory dwelling units, detached ADUs, and backyard cottages using sustainable building practices.
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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 AD... read more
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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Cascadia ADU
901 1st Street, Snohomish, WA 98290
6.1 miles
Cascadia ADU builds attached, detached, garage & basement ADUs across King, Snohomish, Skagit & Chelan Counties, WA. Full-service design, permitting & construction completed in 8–10 weeks with 10+ years experience.
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Puget Sound ADU Builders
4712 South Morgan Street, Seattle, WA 98118
22.3 miles
Puget Sound ADU Builders is a leader in ADU construction in western Washington state, excelling in design, construction, finishing, and permitting ADUs, DADUs, backyard cabins, garage conversions, duplexes, town homes, and multi-unit projects.
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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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Love Construction
17025 33rd Avenue South, SeaTac, WA 98188
28.8 miles
Love Construction builds ADU & DADU units in Seattle & Puget Sound to Passive House standards. Attached ADUs cost $85K–$280K; DADUs $175K–$550K. Includes permitting, energy modeling & a 5-year warranty.
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Avead
3600 136th Place Southeast, Bellevue, WA 98006
19.8 miles
Avead is an ADU contractor offering full-service accessory dwelling unit construction, including attached, detached, junior ADUs, garage conversions, and custom builds. With 20+ years of experience, transparent pricing, and a 5-year warranty.
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Gordon T. Jacob - Multifamily | DADU | Remodel
6901 81st Street Court East, Puyallup, WA 98371
48.1 miles
Gordon T. Jacob is a family-run ADU builder and home remodeling contractor in South Puget Sound. Specializing in detached ADUs, backyard cottages, middle housing, and full home renovations in the Tacoma area.
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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 c... read more
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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BB Builders Pro
801 Southwest 16th Street, Renton, WA 98057
27.6 miles
BB Builders Pro specializes in ADU construction, garage conversions, home additions, and detached backyard cottages. Services include custom design, permitting, zoning compliance, and renovations—ideal for rental income or family housing.
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Verum Construction Inc
17461 147th Street Southeast, Monroe, WA 98272
9.7 miles
An ADU (accessory dwelling unit) is a secondary dwelling on a single-family lot. Types include basement apartments, garage conversions & detached cottages. Costs vary by size, design, permits & materials. Professional ADU contractors ensur... read more
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.