ADU Contractors near Sequim, WA
Tenhulzen Construction
16900 9th Avenue Southeast, Mill Creek, WA 98012
43.4 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
44.7 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
41.2 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
44.2 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
43.8 miles
Carriage Houses Northwest
4401 80th Street Northeast, Marysville, WA 98270
42.6 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
47.2 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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Better Builders
5606 California Avenue Southwest, Seattle, WA 98136
48.8 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
44.9 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
48 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
43.1 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
47.5 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
47.1 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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J Hanby LLC
Edmonds, WA 98020
38.4 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.
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NorthLight Custom Builders
9800 Harbour Place, Mukilteo, WA 98275
38.7 miles
NorthLight Custom Builders offers ADU construction in King & Snohomish County. Services include attached & detached units for rental income, family living, or home offices. Structured process from consultation to one-year warranty follow-up.
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Other cities in Washington
What you need to know
Building ADUs in Sequim's Unique "Blue Hole" Climate
Sequim, Washington is famously known as the "Blue Hole" of the Olympic Peninsula, receiving only about 16 inches of rainfall per year — far less than the surrounding region. This unique microclimate makes Sequim an exceptionally desirable place to live, driving strong demand for Accessory Dwelling Units (ADUs). Whether you're looking to house aging parents, generate rental income, or add long-term property value, working with experienced ADU contractors in Sequim, WA is essential to navigating local building requirements and making the most of this sunny Pacific Northwest gem.
Sequim ADU Regulations and Zoning Requirements
Before breaking ground, homeowners must understand that ADU construction in Sequim is governed by both the City of Sequim and Clallam County regulations, depending on whether the property falls within city limits or the surrounding unincorporated areas. Key rules to be aware of include:
- Lot size requirements: Properties within Sequim city limits typically must meet minimum lot size thresholds before an ADU is permitted.
- ADU size limits: Detached ADUs are generally capped at a maximum square footage, often around 1,000 square feet, though this can vary by zone.
- Owner-occupancy rules: Some zones may require the property owner to occupy either the primary residence or the ADU.
- Setback requirements: ADUs must comply with specific front, rear, and side yard setbacks as defined in Sequim's municipal code.
- Utility connections: Separate water and sewer connections may be required, and Sequim's infrastructure considerations must be factored into project planning.
Types of ADUs Built by Sequim Contractors
Skilled ADU contractors in Sequim are experienced in building a variety of unit types to suit different property layouts and homeowner goals. Common ADU types in the area include:
- Detached ADUs (DADUs): Standalone structures built in backyards, popular among Sequim homeowners with larger lots.
- Attached ADUs: Units connected to the primary home, sharing at least one wall.
- Garage Conversions: Transforming existing garages into livable spaces, a cost-effective option in established neighborhoods.
- Junior ADUs (JADUs): Smaller units created within the existing footprint of the primary residence.
Why Hire a Local Sequim ADU Contractor?
Hiring a local ADU contractor in Sequim, WA offers significant advantages. Local professionals understand the specific permitting process through the Sequim Community Development Department, are familiar with Clallam County building codes, and have established relationships with local inspectors. They also understand regional construction considerations such as seismic zone requirements and building for the mild but occasionally wet Pacific Northwest winters.
With Sequim's growing retirement community and increasing housing demand, ADU construction represents a smart investment. Connect with a qualified Sequim ADU contractor today to begin your project with confidence.