Cornerstone Builders LLC is a Sequim-based ADU builder serving Washington's North Olympic Peninsula for 40+ years. This certified design-build firm manages all phases—design, permitting, and construction—offering transparent, process-driven ADU solutions.
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True Built Home builds custom ADUs in Washington & Oregon, offering 14 floor plans from 495–1,199 sq ft, priced from $119,900. Plans include granny flats, in-law suites & backyard cottages with transparent pricing and customizable designs.
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Heartwood Builders is a Seattle ADU contractor specializing in backyard cottages, basement ADUs, and mother-in-law suites. They handle permitting, use sustainable materials, and help homeowners add rental income or family housing.
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Seattle-based United Signature specializes in ADU & DADU construction. They offer custom design, permitting, and project management. Benefits include rental income, multi-generational living & versatile spaces. Financing available via Enhancify.
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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.
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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.
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An Accessory Dwelling Unit (ADU) is an independent living space on a single-family property. Washington State's HB 1337 boosted ADU construction, easing zoning rules, removing owner-occupancy requirements, and capping impact fees at 50%.
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New Image Construction Management is a Washington State general contractor and building company based in Seattle, WA. With a primary focus of new home construction and renovation of residential and commercial properties.
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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.
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Elite Team Builders Inc. designs & builds ADUs—detached units, garage conversions & backyard cottages—in Seattle, Portland & Los Angeles. They offer custom design, quality materials & transparent pricing for lasting residential value.
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Greenpod Design builds custom DADUs in Washington using SIP construction and sustainable materials. They handle permits, ADA-compliant design, and energy-efficient builds. WA law allows up to two ADUs per lot, up to 1,000 sq ft.
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Everett, Washington, the seat of Snohomish County and home to major employers like Boeing and Naval Station Everett, has seen significant housing demand growth in recent years. As the city continues to expand, ADU contractors in Everett, WA are playing a crucial role in helping homeowners maximize their property value and address the region's housing shortage. Whether you're near the waterfront, in the Bayside neighborhood, or close to the Everett Station transit hub, adding an Accessory Dwelling Unit can be a smart investment in this competitive Pacific Northwest market.
Before hiring an ADU contractor in Everett, it's essential to understand the local zoning and building codes. Everett follows Washington State's updated ADU-friendly legislation, and the city has its own specific requirements that experienced contractors must navigate carefully. Key regulations include:
A qualified Everett ADU contractor will handle every phase of your project, from initial design and permit applications to final inspections. Given Everett's rainy Pacific Northwest climate, experienced local contractors understand the importance of proper waterproofing, insulation, and moisture management — critical factors for any new construction or garage conversion in this region. They will also be familiar with Everett's utility connection requirements, including hooking up to the city's water and sewer systems.
Homeowners in Everett work with ADU contractors to build several types of units, depending on their lot size and budget:
Choosing a contractor with direct experience in Everett, Washington ADU projects ensures smoother permitting, faster approvals, and construction that meets local code standards. Local contractors understand Snohomish County's soil conditions, Everett's specific inspection processes, and the nuances of building in a city that balances historic neighborhoods with rapid modern development. Investing in a professional, licensed ADU contractor in Everett is the most reliable path to a successful, code-compliant accessory dwelling unit.