Seattle Remodeling LLC specializes in ADU construction in Seattle, offering mother-in-law suites, backyard cottages, garage conversions, and granny flats. They help homeowners add value, rental income, and flexible living space.
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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.
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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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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.
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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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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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Levite Construction Co is a Seattle-based family-owned general contractor offering kitchen remodeling, bathroom remodeling, ADU construction, garage conversions, new builds, interior design, and more across the Greater Seattle area.
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Interbay Construction is a Washington State ADU contractor building guest houses, in-law suites, detached ADUs & backyard cottages. Quality materials, clear communication & reliable timelines for every accessory dwelling unit project.
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Emerald ADU Builders Seattle specializes in ADU design, permitting, and construction. They build detached ADUs, attached ADUs, and garage conversions, serving Seattle homeowners with quality craftsmanship and transparent pricing.
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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.
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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.
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Seattle ADU & DADU contractor Emerald City Construction & Renovation builds accessory dwelling units across Seattle, Bellevue & Eastside. Projects cost $350K–$500K+, take 8–14 months, and support rental income, multigenerational living & more.
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Alfa Framing offers residential construction services including structural framing, siding installation, roofing, and ADU/DADU construction. Serving new builds and additions, they bring decades of experience and a solution-oriented approach.
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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.
read moreSeaTac, Washington is a unique city shaped largely by its proximity to Seattle-Tacoma International Airport. This means that ADU contractors working in SeaTac must navigate not only standard King County and city zoning regulations, but also Federal Aviation Administration (FAA) height restrictions and noise compatibility guidelines. These aviation-related constraints can directly impact the design and construction of Accessory Dwelling Units, making it essential to hire an experienced ADU contractor who understands the local landscape.
SeaTac operates under its own municipal code, separate from unincorporated King County. Homeowners looking to build an ADU in SeaTac must comply with the SeaTac Municipal Code Title 15, which governs land use and zoning. Key considerations include:
One of the most distinctive challenges for ADU contractors in SeaTac is addressing aircraft noise. The city falls within the Airport Influence Area, and many properties are subject to significant noise levels measured in Day-Night Average Sound Levels (DNL). Contractors must often incorporate sound attenuation measures such as enhanced insulation, double-pane or triple-pane windows, and specialized ventilation systems to meet habitability standards. Some properties may even qualify for the Port of Seattle's Residential Sound Insulation Program, which can offset certain construction costs.
Working with an ADU contractor who has direct experience in SeaTac provides significant advantages. A knowledgeable local contractor will be familiar with:
Despite its unique regulatory environment, SeaTac presents a strong opportunity for ADU development. The city's location along the Link Light Rail corridor and its proximity to major employment hubs make rental ADUs highly attractive. With Washington State's ADU-friendly legislation continuing to evolve, now is an excellent time to consult with a qualified SeaTac ADU contractor to explore your options, maximize your property's potential, and ensure full compliance with all local, state, and federal requirements.