JayMarc Homes

7525 Southeast 24th Street, Mercer Island, WA 98040 48.7 miles

An Accessory Dwelling Unit (ADU) is an independent living space on a single-family property. Washington State's HB 1337 boosted ADU construction, easing zoning rules, removing owner-occupancy requirements, and capping impact fees at 50%.

ADU Builders Seattle

4712 South Morgan Street, Seattle, WA 98118 45.4 miles

17 years in business Licensed Eco-Friendly

ADU Builders Seattle (Maksymov Brownstone LLC) specializes in detached ADU construction across Seattle & King County. Licensed & bonded, they handle zoning, permits, and SDCI approvals. Services include backyard cottages, two-story units, garage conversions & rental-ready DADUs.

Evola Builds LLC

Poulsbo, WA 98370 49.9 miles

Evola Builds LLC, led by Michael and Amber Evola, offers residential renovation and construction services including bathroom remodels, ADU work, garage conversions, and structural modifications, collaborating closely with architects and homeowners.

Above & Beyond Construction

13346 Eastbrook Drive Southwest, Port Orchard, WA 98367 32.8 miles

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.

The DADU Guy

2522 North Proctor Street, Tacoma, WA 98406 24.8 miles

The DADU Guy is a Tacoma-based detached ADU builder serving Pierce County, WA. Specializing in DADUs, garage conversions, and basement conversions, they offer 5 floor plans, guaranteed pricing, and full project management to maximize property value.

Coates Design Architects

900 Winslow Way East, Bainbridge Island, WA 98110 44.2 miles

Eco-Friendly Luxury Builds

Seattle ADUs offer rental income & flexible living. Coates Design Architects guides homeowners through detached, attached, garage & basement conversions. Costs range $200K–$350K+, with 7–11 month timelines. Sustainable design & permit-ready plans included.

Wise Choice Construction

11626 Southeast 168th Street, Bellevue, WA 98058 43.8 miles

Eco-Friendly

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.

BB Builders Pro

801 Southwest 16th Street, Renton, WA 98057 42.8 miles

Eco-Friendly

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.

Harjo Construction

4900 15th Avenue Northwest, Seattle, WA 98107 49.4 miles

15 years in business

Harjo Construction builds AADUs & DADUs in Seattle with 300+ projects since 2010. Costs range $275K–$650K, max 1,000 sq ft, 4–6 month build time. Seattle removed owner-occupancy rules, boosting ADU rental potential.

Cast Architecture

115 North 36th Street, Seattle, WA 98103 49.2 miles

15 years in business In-House Architect 80 ADU projects completed

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.

Microhouse

114 North 42nd Street, Seattle, WA 98103 49.5 miles

Microhouse is a Seattle-based ADU builder specializing in custom detached ADUs (DADUs). They guide homeowners through zoning, design, and construction. Seattle permitted 551 DADUs in 2022, with a 40% increase in 2023. Microhouse offers site assessments and tailored DADU solutions.

Seattle ADU Builders

4138 Baker Avenue Northwest, Seattle, WA 98107 49.4 miles

Licensed

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.

Anderbar Construction

12391 Glenwood Road Southwest, Port Orchard, WA 98367 28.9 miles

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.

Huskies Construction

1201 Monster Road Southwest, Renton, WA 98057 42.5 miles

Huskies Construction in Renton specializes in home additions, ADUs, and DADUs. Services include garage conversions, granny flats, in-law suites, backyard cottages, and room additions, helping homeowners expand living space or generate rental income.

Northwest ADU

1201 Pacific Avenue, Tacoma, WA 98402 26 miles

Licensed

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 months.

Other cities in Washington

What you need to know

ADU Contractors in Olympia, WA: Building in Washington's Capital City

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.

Olympia ADU Regulations and Zoning Requirements

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:

The Permitting Process for ADUs in Olympia

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.

Why Hire a Local ADU Contractor in Olympia?

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.

Types of ADUs Built in Olympia

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.

ADU Contractors near Olympia, WA