LYD Construction

4055 Lake Washington Boulevard Northeast, Kirkland, WA 98033 42.6 miles

LYD Construction is a Seattle-area ADU builder & remodeling contractor with 25 years of experience. Services include kitchen, bathroom, basement renovations, deck building & ADU construction. Financing up to $200,000 available. Based in Be... read more

Modern ADU Plans

3660 Lavender Ln NE, Bainbridge Island, WA 98110 33.1 miles

Explore pre-designed ADU floor plans from Modern ADU Plans — studio, 1-bed, 2-bed, garage conversions & more. Save time, reduce costs & maximize property value with ready-to-build accessory dwelling unit designs.

Verum Construction Inc

17461 147th Street Southeast, Monroe, WA 98272 40.8 miles

An ADU (accessory dwelling unit) is a secondary dwelling on a single-family lot. Types include basement apartments, garage conversions & detached cottages. Costs vary by size, design, permits & materials. Professional ADU contractors ensur... read more

New Day Construction

15021 116th Place Northeast, Kirkland, WA 98034 38.5 miles

Licensed 21 years in business Eco-Friendly

New Day Construction is a licensed ADU builder in Bellevue, WA, with 21+ years of experience and 250+ projects. They build detached, attached, garage, basement, and custom ADUs, managing permits and design from start to finish.

Harjo Construction

4900 15th Avenue Northwest, Seattle, WA 98107 36.9 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.

J Hanby LLC

Edmonds, WA 98020 29.3 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.

Northwest ADU Builders of Mill Creek

6100 219th Street Southwest, Mountlake Terrace, WA 98043 32 miles

Northwest ADU is a trusted ADU builder in Mill Creek, WA, offering full-service accessory dwelling unit construction, including detached ADUs, garage conversions, and basement conversions, with expert permit and zoning support.

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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What you need to know

Searching for top Basement Conversion ADU Contractors in Port Townsend, Washington? Our directory highlights trusted local professionals who specialize in designing and building accessory dwelling units (ADUs).

Working with a qualified Basement Conversion ADU Contractor in Port Townsend ensures your ADU project meets local building codes, zoning laws, and permit requirements. Whether you're planning a detached ADU, garage conversion, or backyard cottage, experienced Basement Conversion professionals can guide you through every step.

Port Townsend homeowners are increasingly investing in ADUs to create additional living space, generate rental income, or support multigenerational living. The Basement Conversion experts featured here bring local expertise and proven experience to help make your project a success.

Browse our listings to find the best Basement Conversion ADU Contractors in Port Townsend, Washington, and get started today.

Basement Conversion near Port Townsend, WA