SkyDADU is a DADU builder and equity partner serving King, Snohomish, and Pierce counties in Washington State. They offer fixed-price packages, up to 100% funding, and handle permitting, construction, and condominiumization for detached accessory dwelling units.
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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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HiLine Homes is an experienced ADU builder in Idaho with nearly 30 years in custom home construction. They offer attached and detached ADU designs for rental income, multigenerational living, or home offices, with financing options available.
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Hammer & Hand is a Portland & Seattle general contractor with 30+ years of experience in new homes, remodels, ADUs & commercial builds. Employee-owned, they offer expert craftsmanship, custom woodwork & trusted subcontractor networks.
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Seattle's 2019 ADU law changes made it easier to build accessory dwelling units on single-family lots. DADUs can't exceed 50% of the main home's size. No parking required. New detached ADUs start around $350,000.
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Avio Homes is a Seattle-based ADU contractor specializing in detached ADUs, backyard cottages, and in-law suites. Serving Seattle, Tacoma, and Olympia, they handle design, permitting, and construction with local zoning expertise.
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FTS Excavation offers full-service ADU site development in South Puget Sound, Western Washington. Services include grading, utilities, septic systems, foundation excavation & permits. Certified, reliable ADU contractor for backyard homes & accessory dwelling units.
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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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Giant Builders Seattle is a Kent, WA general contractor with 20+ years of experience offering ADU construction, garage conversions, kitchen & bathroom remodeling, room additions, roofing, deck building, and more.
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H26 Builders is a Seattle ADU contractor offering attached ADUs, detached ADUs, and garage conversions. Services include design consultation, permitting support, and project management to help homeowners add functional living or rental space.
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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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Haas Development & Construction offers ADU & DADU construction in Greater Seattle. They handle planning, permits, design, and builds for attached & detached units, including prefab DADU plans, helping homeowners add rental income or family housing.
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Seattle's trusted DADU & ADU builder offers custom builds, ADU conversions, and prefab cabins. Transparent pricing, expert guidance, and hands-on construction help homeowners add lasting value with backyard cottages and granny flats.
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Olympia, the capital city of Washington State, offers a unique environment for accessory dwelling unit (ADU) construction. Known for its progressive housing policies and commitment to sustainable growth, Olympia has embraced ADUs as a key solution to its ongoing housing affordability challenges. The city's proximity to state government offices, Evergreen State College, and a thriving arts community creates consistent demand for flexible housing options. Experienced ADU contractors in Olympia, WA understand how to navigate the city's specific zoning codes and permitting processes to deliver high-quality results for homeowners.
Before breaking ground, it's essential to understand the local rules governing ADU construction in Olympia. The City of Olympia allows ADUs in most residential zones, including R-1, R-2, R-4, and R-6 districts. Key regulations that Olympia ADU contractors must follow include:
Working with a knowledgeable ADU contractor in Olympia, Washington is critical when navigating the city's permitting process. Permits are issued through the City of Olympia's Community Planning and Development department. The process typically involves design review, building permit applications, and inspections. Olympia has made efforts to streamline ADU permitting in recent years, but the process can still take several weeks to months depending on project complexity. Contractors familiar with local requirements can help avoid costly delays by submitting complete and accurate documentation from the start.
Hiring a local ADU contractor in Olympia, WA brings significant advantages. Local professionals are familiar with the Pacific Northwest's climate considerations, including moisture management, proper insulation for wet winters, and energy-efficient building practices aligned with Washington State's energy code. They also have established relationships with local subcontractors, suppliers, and city inspectors, which can help keep your project on schedule and within budget.
Whether you're looking to generate rental income, house a family member, or increase your property value, partnering with a qualified ADU contractor in Olympia, Washington is the first step toward a successful project.