Renovate Builders

4555 39th Avenue Southwest, Seattle, WA 98116 7 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 49.1 miles

ADU Builders Seattle

4712 South Morgan Street, Seattle, WA 98118 2.4 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.

Carriage Houses Northwest

4401 80th Street Northeast, Marysville, WA 98270 35 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 4.6 miles

Drew Thatcher Construction

23 Country Club Drive Southwest, Lakewood, WA 98498 33 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 4.6 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 8.6 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 30.9 miles

Evola Builds LLC

Poulsbo, WA 98370 22.5 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 4.5 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 3.6 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 23.1 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 17.6 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

Building ADUs on Mercer Island: Navigating a Unique Island Community

Mercer Island, Washington, is a distinctive residential community situated entirely on an island in Lake Washington, connected to Seattle and Bellevue via Interstate 90. This unique geography creates specific challenges and opportunities for ADU contractors in Mercer Island. The city is known for its affluent, tree-lined neighborhoods, strict environmental protections, and limited land availability — all factors that make accessory dwelling units (ADUs) an increasingly attractive solution for homeowners looking to maximize their property's potential.

Mercer Island ADU Regulations and Zoning Requirements

Before breaking ground, experienced Mercer Island ADU contractors must be well-versed in the city's specific zoning codes and building regulations. Mercer Island falls under King County jurisdiction for some matters but maintains its own municipal code. Key regulations homeowners and contractors need to understand include:

Types of ADUs Commonly Built in Mercer Island

Given the island's predominantly single-family residential character and lot configurations, ADU builders in Mercer Island, WA most frequently work on the following project types:

Why Hire a Local ADU Contractor in Mercer Island?

Working with a licensed ADU contractor familiar with Mercer Island is essential for a smooth permitting and construction process. Local contractors understand the nuances of building on island terrain, including managing utility connections, dealing with the city's permit office, and respecting the community's high aesthetic standards. Mercer Island homeowners consistently prioritize quality craftsmanship and design that complements the area's natural beauty and upscale character.

Start Your Mercer Island ADU Project Today

Whether you're looking to create a rental income unit, house family members, or increase your property value, an ADU is a smart investment in Mercer Island's competitive real estate market. Connect with a qualified ADU contractor serving Mercer Island, Washington to discuss your project goals, review local code requirements, and begin the design and permitting process with confidence.

ADU Contractors near Mercer Island, WA