Seattle Modern Buildings ADU Builder
Seattle, WA
5.0(10)
ADU ConstructionADU PlanningRemodeling
Seattle Modern Buildings ADU Builder is a Seattle-based design-build firm specializing in detached ADUs, duplexes, and modern homes.
Looking for the best ADU contractors in Seattle, Washington? Our directory features 9 vetted adu contractors serving the Seattle area. Whether you're planning a new ADU construction, garage conversion, or backyard cottage, find the right builder for your project.
Seattle Modern Buildings ADU Builder is a Seattle-based design-build firm specializing in detached ADUs, duplexes, and modern homes.
Level Up Construction & Remodeling is a full-service home contractor specializing in complete home renovations and new construction, kitchen and bath remodeling ...
Puget Sound ADU Builders are experts in innovative Accessory Dwelling Units designed for comfort and functionality.
Haas Development & Construction is proud to offer the Greater Seattle area services to build ADUs, configured for your unique property — either attached (AADU) or detached (DADU) from your home.
Seattle ADU Builders is a construction company located in Seattle, WA that specializes in ADU/DADU design, permitting, and construction.
Specializing in ADU construction and related services in Seattle, WA.
Specializing in ADU construction and related services in Seattle, WA.
Specializing in ADU construction and related services in Seattle, WA.
Specializing in ADU construction and related services in Seattle, WA.
Seattle is one of the top markets for accessory dwelling units in Washington. With growing demand for affordable housing, ADU construction in Seattle offers homeowners an excellent opportunity to add living space, generate rental income, or house family members. Our curated list of adu contractors in Seattle helps you find experienced professionals who understand local building codes, zoning regulations, and permit requirements.
ADU construction costs in Seattle typically range from $150,000 to $350,000 depending on size, design, and finishes. Garage conversions are generally less expensive ($80,000–$150,000), while custom-built detached ADUs can cost more. Get free quotes from our listed adu contractors to compare prices.
Yes, ADU construction in Seattle requires building permits. Washington has specific ADU regulations, and local zoning laws may have additional requirements. Our listed builders can help you navigate the permitting process.
ADU construction timelines in Seattle typically range from 4–12 months, depending on the project type. Prefab ADUs can be installed in 2–4 months, while custom builds may take 8–12 months including design and permitting.