Seattle homeowners are increasingly converting their garages into modern functional ADUs (Accessory Dwelling Units) as the city housing market evolves. These transformations not only make flexible living spaces but also offer strong rental income potential and impressive returns on investment. Below is a list of the top five companies leading this trend, recognized for their professionalism, expertise, diverse services, and even strong local presence.
1. Seattle-ADU
Leading the list is Seattle‑ADU also recognized for their full‑service ADU solutions including garage conversions. They manage every detail: from initial site walk‑throughs and design plans to permitting and construction execution. Their seamless, in‑house process ensures quality, compliance, and satisfaction. Seattle‑ADU excels in transforming unused garage space into self‑contained, livable units tailored to clients needs.
More information: 509 Olive Way
Seattle WA 98101 United States
Phone Number :425–577–7778
2. Gary Merlino Construction Co
In second place is Gary Merlino Construction Co, a long‑established Seattle firm founded in 1962. Their extensive experience with infrastructure and site development and public works projects combined with their dedication to quality work makes them an excellent option for garage conversion projects that require structural integrity and permitting expertise.
3. Levite Construction Co
Coming in third , Levite Construction Co brings a strong reputation in Seattle for architectural excellence and precise execution. Their portfolio includes work on ADUs as well as room additions and garage conversions. Levite provides complete services that include architecture and engineering and 3D design and full construction while maintaining close collaboration with clients throughout the entire process from conceptualization to final permits and build stages. Their all‑in‑one service makes them stand out for homeowners seeking a holistic build experience.
4. Puzzle Construction Group
Coming fourth Puzzle Construction Group, a local Seattle contractor skilled in residential custom homes, renovations, and remodeling.Their publicly displayed projects do not explicitly show ADUs but their expertise in detailed residential construction and strong reputation indicates they are well‑equipped to handle garage conversions with attention to design and homeowner collaboration.
5. Turner Construction Company
Closing the list is Turner Construction Company, a global industry leader. Turner stands out for its work on large commercial and institutional projects including the SEA Airport expansion and Pike Place Market renovation yet their ability to handle complex construction and their deep Seattle experience positions them as a suitable choice for high-end or technically demanding ADU conversions. Their leadership in BIM, sustainability, and project coordination provides a robust foundation for innovative builds. With a proven record of delivering projects on time and within budget, Turner offers homeowners confidence and reliability. Their client-focused approach ensures each ADU conversion is tailored to both functional needs and long-term value, while their emphasis on innovation, precision, and quality craftsmanship makes them a trusted partner for transforming challenging ideas into enduring living spaces.
The ADU market in Seattle is expanding rapidly and converting a garage into a living unit increases property value while providing future adaptability. These top five firms each bring different strengths whether it’s focus, design integration, civic experience, technical prowess, or custom detail that can ensure your project is both functional and functional beautifully.
