ADU Contractors near Port Townsend, WA
Tenhulzen Construction
16900 9th Avenue Southeast, Mill Creek, WA 98012
32.5 miles
Tenhulzen Construction offers ADU and DADU construction services in Washington State, providing pre-approved and custom plans. Options suit various budgets and timelines, with benefits including added property value and flexible living spaces.
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Ballard Backyard Cottages
4142 2nd Avenue Northwest, Seattle, WA 98107
37.8 miles
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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Coates Design Architects
900 Winslow Way East, Bainbridge Island, WA 98110
36.7 miles
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.
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Above & Beyond Construction
13346 Eastbrook Drive Southwest, Port Orchard, WA 98367
43.5 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.
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Pelletier Construction Group
1150 North 84th Street, Seattle, WA 98103
36.3 miles
Carriage Houses Northwest
4401 80th Street Northeast, Marysville, WA 98270
28.7 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.
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Cascadia ADU
901 1st Street, Snohomish, WA 98290
34.7 miles
Cascadia ADU builds attached, detached, garage & basement ADUs across King, Snohomish, Skagit & Chelan Counties, WA. Full-service design, permitting & construction completed in 8–10 weeks with 10+ years experience.
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Greater Seattle Remodeling
1850 130th Ave NE #1, Bellevue, WA 98005
44.9 miles
Greater Seattle Remodeling builds code-compliant ADUs across the Seattle metro, including detached ADUs, garage conversions, and basement apartments. They match homeowners with vetted contractors for permits, design, and construction.
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Bellingham ADU Builders
2111 King Street, Bellingham, WA 98225
46.4 miles
Bellingham ADU Builders offers full-service ADU construction in Whatcom County, including detached and attached ADUs. Costs range from $200K–$550K+. Permits included. Free 48-hour feasibility study available. HB 1337 allows up to two ADUs per lot.
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Better Builders
5606 California Avenue Southwest, Seattle, WA 98136
43.6 miles
Better Builders is a Seattle-based general contractor specializing in residential remodeling, garage conversions, ADUs, kitchen and bathroom remodels, basement finishing, deck repairs, and exterior work, with dedicated project management.
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Cast Architecture
115 North 36th Street, Seattle, WA 98103
38.1 miles
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.
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Exceptional Home Builders Seattle
1525 11th Avenue, Seattle, WA 98122
41.3 miles
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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Olympic View Building
10037 Washington 3, Bremerton, WA 98312
43.6 miles
Olympic View Building is an ADU contractor offering detached ADU construction, garage conversions, in-law suites, granny flats, and JADU services. They help homeowners add value and living space while navigating zoning laws and building codes.
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Seattle ADU
509 Olive Way, Seattle, WA 98101
40.9 miles
Seattle ADU is a Seattle-based contractor specializing in accessory dwelling units, including detached ADUs, garage conversions, attached ADUs, and JADUs. They manage design, permitting, and construction for homeowners seeking additional living space.
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Seattle Backyard Homes
4813 37th Avenue Northeast, Seattle, WA 98105
39.3 miles
Seattle Backyard Homes builds expert ADUs, DADUs, garage conversions & backyard cottages in Seattle and Bellevue. Full-service ADU contractors handling design, permits, zoning & construction with quality craftsmanship and transparent pricing.
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Other cities in Washington
What you need to know
ADU Contractors in Port Townsend: Building in a Historic Victorian Seaport
Port Townsend, Washington, is one of the best-preserved Victorian seaports in the United States, and its rich architectural heritage creates a unique environment for ADU contractors in Port Townsend. The city's historic districts, including the National Historic Landmark designation for much of its downtown and residential areas, mean that building an Accessory Dwelling Unit here requires careful attention to design standards and local guidelines. Experienced ADU contractors understand how to balance modern living needs with the preservation requirements that make Port Townsend so distinctive.
Local Regulations and Zoning for ADUs in Port Townsend
Port Townsend follows Jefferson County and City of Port Townsend zoning codes that govern ADU construction. ADU contractors in Port Townsend, WA must navigate specific rules, including:
- ADUs are generally permitted in single-family residential zones (R-I and R-II districts)
- Maximum ADU size is typically limited to 1,000 square feet or a percentage of the primary dwelling's square footage
- Setback requirements must be carefully observed, particularly in older, smaller lots common in Port Townsend
- Design standards in historic districts may require materials and aesthetics consistent with Victorian-era architecture
- Separate utility connections and owner-occupancy requirements may apply depending on the property type
Working with a knowledgeable ADU contractor in Port Townsend ensures that all permits are properly filed with the City of Port Townsend's Development Services Department and that your project meets both state and local building codes.
Types of ADUs Built in Port Townsend
Given the character of Port Townsend's neighborhoods, skilled ADU contractors commonly build several types of accessory dwelling units to suit the city's unique housing stock:
- Detached ADUs (DADUs): Standalone backyard cottages that complement the main residence
- Attached ADUs: Additions built onto an existing home, maintaining architectural continuity
- Garage Conversions: Transforming existing carriage houses or garages into livable spaces
- Basement ADUs: Converting lower-level spaces in older Victorian homes into independent units
Why Hire a Local ADU Contractor in Port Townsend?
Hiring a local ADU contractor in Port Townsend, Washington offers significant advantages. Local contractors are familiar with the city's permitting timelines, its historic preservation review process, and the specific challenges posed by the region's coastal climate, including moisture management and wind resistance. Port Townsend's relatively small lot sizes and older infrastructure also require contractors with hands-on experience navigating tight spaces and aging utility systems.
Whether you are looking to create rental income, house a family member, or increase your property value, an ADU in Port Townsend is a smart investment. Connect with a qualified, licensed ADU contractor today to explore your options and begin the planning process in this beautiful Pacific Northwest coastal community.