Attached ADU in Washington
Olympic View Building
10037 Washington 3, Bremerton, WA 98312
Olympic View Building is an ADU contractor offering detached ADU construction, garage conversions, in-law suites, granny flats, and JADU services. They help homeowners add value and living space while navigating zoning laws and building codes.
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Heartwood Builders
1902 North 34th Street, Seattle, WA 98103
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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Drew Thatcher Construction
23 Country Club Drive Southwest, Lakewood, WA 98498
Drew Thatcher Construction builds ADUs in Lakewood, WA, including detached units, attached ADUs, and garage conversions. Founded by a Navy nuclear engineer, they offer design-build services with local Pierce County expertise.
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Above & Beyond Construction
13346 Eastbrook Drive Southwest, Port Orchard, WA 98367
ADUs offer self-contained living with kitchen, bath & bedroom for rental or family use. Room additions expand existing home space. Above & Beyond Construction serves Seattle & Puget Sound homeowners with both project types.
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ModernSpace ADU Construction Redmond
17181 Redmond Way, Redmond, WA 98052
ModernSpace ADU Construction is a certified ADU builder serving Redmond, offering tailored accessory dwelling unit services. Competitive pricing, no hidden fees, and a satisfaction guarantee make them a trusted local choice.
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Exceptional Home Builders Seattle
1525 11th Avenue, Seattle, WA 98122
Exceptional Home Builders is a Seattle ADU contractor with 20+ years of experience. They offer full-service ADU construction, design-build, permitting, interior design, and renovations for backyard cottages, garage conversions, and basement units.
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Homecare Heroes
930 1/2 Valley Mall Parkway, Wenatchee, WA 98802
When you choose Your Home Care Heroes, you’re choosing expertise focused on one goal: creating an exceptional building experience. Our clients consistently tell us they ‘love their home and wouldn’t change a thing,’ citing our clear communication, attention to detail, and unwavering support throughout the process.
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Mallard Brothers Construction
120 State Avenue Northeast, Olympia, WA 98501
Mallard Brothers Construction builds ADUs & Tiny Homes in Olympia, WA. They offer attached, detached, garage conversions & ADA-accessible units, managing design, permits & construction for property owners seeking rental income or extra living space.
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Hug Construction
331 North Fancher Road, Spokane Valley, WA 99212
Hug Construction is an Inland Northwest contractor serving Spokane, Lincoln, Stevens, Pend Oreille, Bonner & Kootenai counties. Specializing in custom homes, remodeling, ADUs & commercial builds, they offer fixed bids, 2-year warranties & weekly project updates.
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Wise Choice Construction
11626 Southeast 168th Street, Bellevue, WA 98058
Wise Choice Construction offers expert home additions & ADU builds in Seattle, WA. From detached ADUs and granny flats to in-law suites, they handle permits, zoning, and seamless integration—boosting property value and livable space.
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BB Builders Pro
801 Southwest 16th Street, Renton, WA 98057
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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Anderbar Construction
12391 Glenwood Road Southwest, Port Orchard, WA 98367
We specialize in building high-quality, custom Accessory Dwelling Units (ADUs) that provide both functionality and style for homeowners in Port Orchard, WA, and the surrounding areas. Whether you’re looking to add a rental property, create a cozy space for family, or simply expand your living area, an ADU is a versatile and valuable investment.
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Backyard ADU
4813 37th Avenue Northeast, Seattle, WA 98105
Backyard ADU is a full-service ADU contractor managing every stage of accessory dwelling unit builds, including feasibility, permits, site surveys, foundations, construction, utility connections, and condo legal services.
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VDC Builders Inc
14308 NE Powers St, Vancouver, WA 98682
VDC Builders Inc specializes in ADU design & construction, including backyard cottages, in-law suites & rental units. Services cover flooring, kitchen & bathroom remodels, custom home building & cabinet refinishing.
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Blue Lake Construction
12721 Northeast Bel Red Road, Bellevue, WA 98005
Blue Lake is a family-owned Washington State ADU contractor specializing in custom ADUs, DADUs, granny flats, and full-service construction. They offer fixed pricing, transparent communication, and skilled teams for residential and investment projects.
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Other cities in Washington
What you need to know
Searching for top Attached ADU ADU Contractors in Washington? Our directory highlights trusted local professionals who specialize in designing and building accessory dwelling units (ADUs).
Working with a qualified Attached ADU ADU Contractor in Washington ensures your ADU project meets local building codes, zoning laws, and permit requirements. Whether you're planning a detached ADU, garage conversion, or backyard cottage, experienced Attached ADU professionals can guide you through every step.
Washington homeowners are increasingly investing in ADUs to create additional living space, generate rental income, or support multigenerational living. The Attached ADU experts featured here bring local expertise and proven experience to help make your project a success.
Browse our listings to find the best Attached ADU ADU Contractors in Washington, and get started today.