Renovate Builders

4555 39th Avenue Southwest, Seattle, WA 98116 9 miles

SkyDADU

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.

Doyle Construction

300 Deschutes Way Southwest, Tumwater, WA 98501 40.7 miles

ADU Builders Seattle

4712 South Morgan Street, Seattle, WA 98118 7 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.

Carriage Houses Northwest

4401 80th Street Northeast, Marysville, WA 98270 43.7 miles

Carriage Houses NW is a Pacific Northwest ADU builder specializing in infill housing. They develop ADUs, duplexes, and townhomes, partner with homeowners, and offer fee-to-build services, leveraging WA State HB 1110 and HB 1337 legislation.

Northwest Builders & Renovation

1135 Lake Washington Boulevard North, Renton, WA 98057 6 miles

Drew Thatcher Construction

23 Country Club Drive Southwest, Lakewood, WA 98498 24.1 miles

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.

Volcano Builders

1750 112th Avenue Northeast, Bellevue, WA 98004 13.5 miles

Licensed 4 years in business Eco-Friendly

Volcano Builders is a licensed, family-owned construction company serving Seattle, Bellevue & Monroe, WA. Specializing in kitchen remodels, bathroom renovations, home additions, deck builds, and ADU construction since 2021.

Microhouse

114 North 42nd Street, Seattle, WA 98103 15 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.

Detray's Custom Housing

10209 149th Street East, Puyallup, WA 98374 22.3 miles

Evola Builds LLC

Poulsbo, WA 98370 26 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.

Hammer & Hand

2450 6th Avenue South, Seattle, WA 98134 9.5 miles

Licensed 30 years in business

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.

Northwest ADU Bellevue

278 106th Avenue Northeast, Bellevue, WA 98004 12.5 miles

Licensed

Northwest ADU builds custom detached ADUs, garage conversions & basement ADUs across Western Washington. Serving King, Pierce & Snohomish Counties with full-service ADU construction, build-ready plans & permit management.

Anderbar Construction

12391 Glenwood Road Southwest, Port Orchard, WA 98367 18.3 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.

J Hanby LLC

Edmonds, WA 98020 25 miles

J Hanby LLC offers ADU and basement conversion services in the Eastside area. Specializing in detached ADUs, garage conversions, granny flats, and basement renovations, they help homeowners maximize property value and ROI.

Other cities in Washington

What you need to know

ADU Contractors in SeaTac, WA: Building Near One of the Nation's Busiest Airports

SeaTac, Washington is a unique city shaped largely by its proximity to Seattle-Tacoma International Airport. This means that ADU contractors working in SeaTac must navigate not only standard King County and city zoning regulations, but also Federal Aviation Administration (FAA) height restrictions and noise compatibility guidelines. These aviation-related constraints can directly impact the design and construction of Accessory Dwelling Units, making it essential to hire an experienced ADU contractor who understands the local landscape.

SeaTac Zoning and ADU Regulations

SeaTac operates under its own municipal code, separate from unincorporated King County. Homeowners looking to build an ADU in SeaTac must comply with the SeaTac Municipal Code Title 15, which governs land use and zoning. Key considerations include:

Noise Mitigation: A Critical Factor for SeaTac ADU Construction

One of the most distinctive challenges for ADU contractors in SeaTac is addressing aircraft noise. The city falls within the Airport Influence Area, and many properties are subject to significant noise levels measured in Day-Night Average Sound Levels (DNL). Contractors must often incorporate sound attenuation measures such as enhanced insulation, double-pane or triple-pane windows, and specialized ventilation systems to meet habitability standards. Some properties may even qualify for the Port of Seattle's Residential Sound Insulation Program, which can offset certain construction costs.

Why Hire a Local SeaTac ADU Contractor?

Working with an ADU contractor who has direct experience in SeaTac provides significant advantages. A knowledgeable local contractor will be familiar with:

Maximizing Your Investment with an ADU in SeaTac

Despite its unique regulatory environment, SeaTac presents a strong opportunity for ADU development. The city's location along the Link Light Rail corridor and its proximity to major employment hubs make rental ADUs highly attractive. With Washington State's ADU-friendly legislation continuing to evolve, now is an excellent time to consult with a qualified SeaTac ADU contractor to explore your options, maximize your property's potential, and ensure full compliance with all local, state, and federal requirements.

ADU Contractors near SeaTac, WA