ADU Contractors near Bainbridge Island, WA

Harmony Architecture Studio

1324 Lombard Avenue, Everett, WA 98201 28.2 miles

read more

Armada Design & Build Inc.

15600 Northeast 8th Street, Bellevue, WA 98008 19.3 miles

Licensed 14 years in business Luxury Builds

Armada Design & Build Inc., Bellevue, WA, offers full-service residential design-build since 2011. Specializing in remodels, home additions, and custom builds across Puget Sound, they deliver turnkey solutions with in-house design and quality ... read more

Carriage Houses Northwest

4401 80th Street Northeast, Marysville, WA 98270 34.2 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.

read more

Zee Design & Build

570 Kirkland Way, Kirkland, WA 98033 16.3 miles

13 years in business

Zee Design & Build is a Kirkland, WA ADU contractor serving King, Snohomish, Skagit & Island Counties. Offering full-service ADU construction—garage conversions, basement units, backyard cottages & more—since 2012.

read more

Seattle Tiny Homes

24015 Washington 410, Buckley, WA 98321 38.8 miles

Licensed 19 years in business Prefab Specialist

Seattle Tiny Homes, based in Buckley, WA since 2005, builds tiny houses, park models, and modular ADUs under 400 sq ft. Washington state-certified, they offer financing options and helped establish the Washington Tiny House Association.

read more

NW Finishing

2265 116th Avenue Northeast, Bellevue, WA 98004 16.6 miles

NW Finishing is a Seattle-area ADU contractor offering full-service accessory dwelling unit design and construction. Serving Bellevue, Kirkland, Redmond, Renton, and more, they handle permits, planning, and builds for detached, cottage, and prefab... read more

Northwest Builders & Renovation

1135 Lake Washington Boulevard North, Renton, WA 98057 18.6 miles

read more

Twin Brothers Group

14205 Southeast 36th Street, Bellevue, WA 98006 18.9 miles

Licensed

Twin Brothers Group is a licensed framing contractor in Washington State specializing in ADU, DADU, garage conversions, and home additions across King and Snohomish County, serving Seattle-area GCs and owner-builders.

read more

J Hanby LLC

Edmonds, WA 98020 13.6 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.

read more

Axiom Design Build

5424 Ballard Avenue Northwest, Seattle, WA 98107 7.5 miles

23 years in business

Axiom Design Build is a Seattle-based, Ballard-located design-build firm since 2001, specializing in home remodels, ADUs, garage conversions, and backyard cottages, offering integrated design and construction services for homeowners throughout the... read more

Sound Foundations

5 South Nevada Street, Seattle, WA 98134 10.8 miles

6000 ADU projects completed

read more

Doyle Construction

300 Deschutes Way Southwest, Tumwater, WA 98501 46.2 miles

read more

Brutsky Builds

800 Bellevue Way Northeast, Bellevue, WA 98004 16 miles

Licensed Eco-Friendly

Brutsky Builds is a licensed ADU contractor in Bellevue offering full-service accessory dwelling unit construction. Services start from $210,000, covering design, permitting, and build completion in ~6 months.

read more

Cast Architecture

115 North 36th Street, Seattle, WA 98103 8.7 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 c... read more

Sockeye Homes

14638 SE 229th Pl, Kent, WA 98042 25.2 miles

Sockeye Homes designs & builds custom ADUs and DADUs, offering full-service support from permits to construction. Fixed-cost packages range from $218K–$335K+, suiting retirees, families & rental income seekers.

read more

Other cities in Washington

• Battle Ground
• Bellevue
• Bellingham
• Black Diamond
• Bothell
• Bremerton
• Buckley
• Burbank
• Camas
• Edmonds
• Everett
• Fall City
• Federal Way
• Goldendale
• Kennewick

What you need to know

Building ADUs on Bainbridge Island: A Ferry-Connected Community with Unique Opportunities

Bainbridge Island, Washington, is one of the most desirable communities in the Puget Sound region, offering a rare blend of small-town charm and easy access to Seattle via the Washington State Ferry. This island setting creates a unique housing market where Accessory Dwelling Units (ADUs) are increasingly in demand. Whether you're looking to house extended family, generate rental income, or add long-term property value, working with experienced ADU contractors in Bainbridge Island is essential to navigating the island's specific building environment.

Bainbridge Island ADU Regulations and Zoning Requirements

The City of Bainbridge Island has its own set of zoning codes and land use regulations that directly impact ADU construction. Under the Bainbridge Island Municipal Code (BIMC), ADUs are permitted in most residential zones, but contractors must carefully adhere to the following key requirements:

• Maximum ADU size: Detached ADUs are generally limited to 1,000 square feet or 50% of the primary dwelling's square footage, whichever is less.
• Setback requirements: ADUs must comply with specific setback rules that vary by zoning district, often requiring a minimum of 5 feet from side and rear property lines.
• Owner-occupancy: Bainbridge Island has historically required owner-occupancy for at least one of the units on the property, though regulations continue to evolve in line with Washington State law.
• Critical areas compliance: Given the island's sensitive ecosystems, including wetlands and shorelines, ADU projects may require additional environmental review under the city's Critical Areas Ordinance.
• Septic and utility considerations: Many Bainbridge Island properties rely on private septic systems, which must be evaluated and potentially upgraded to accommodate an ADU.

Why Hiring Local ADU Contractors in Bainbridge Island Matters

Working with local ADU contractors familiar with Bainbridge Island is a significant advantage. Island-based or island-experienced contractors understand the logistical challenges of building on an island, including coordinating material deliveries around ferry schedules, managing limited contractor availability, and working within the city's permitting timelines. The Bainbridge Island Department of Planning and Community Development oversees all building permits, and experienced contractors know how to streamline the approval process efficiently.

Types of ADUs Popular on Bainbridge Island

Given the variety of property types across the island, several ADU configurations are commonly built here:

1. Detached ADUs (DADUs): Standalone backyard cottages that are especially popular on larger residential lots.
2. Attached ADUs: Additions to existing homes, ideal for properties with limited yard space.
3. Garage conversions: Converting existing detached garages into livable ADU spaces.
4. Basement ADUs: Utilizing existing below-grade space for a cost-effective ADU solution.

Start Your Bainbridge Island ADU Project Today

Investing in an ADU on Bainbridge Island is a smart move in one of Washington's most sought-after communities. With rising housing demand and strong rental markets driven by Seattle commuters, a well-built ADU can deliver excellent returns. Connect with a qualified ADU contractor on Bainbridge Island today to discuss your project goals, understand local permitting requirements, and take the first step toward maximizing your property's potential.