Our Mission
Seattle ADU Builders exists to make ADU construction simple, transparent, and accessible for King County homeowners. We believe every homeowner should be able to understand what's possible on their property — without wading through municipal code, scheduling pre-application meetings, or guessing at costs.
Washington's HB 1337 and Seattle's ongoing ADU ordinance updates created the most favorable ADU environment in the state's history. We built our process to help homeowners take full advantage of these changes — from a free GIS-powered feasibility study through dedicated permitting to turn-key construction.
Meet Your Team
Eric Dexter
General Contractor & Builder
Eric is your single point of contact from design through final inspection. He coordinates architectural drawings, structural engineering, permitting, and the entire construction process — managing every phase so you don't have to chase updates across multiple vendors.
- Licensed WA State General Contractor
- Specializes in residential ADU construction
- Seattle & King County focused
Want to work with our team?
Start with a free feasibility study — we'll tell you exactly what's possible on your property.
Sustainable Construction, Built In
Every ADU we build in Seattle incorporates energy-efficient design — high-performance building envelopes, heat pump systems, and responsible materials sourced from Pacific Northwest suppliers. We don't treat sustainability as an upgrade. It's our standard.
Our sustainable building practices reduce operating costs by 50–60% compared to conventional construction, and our builds are designed to qualify for the 30% federal energy-efficient home tax credit — potentially saving homeowners $60,000–$135,000 on their ADU project.
Why Local Matters
We Know the Code
Seattle's ADU ordinance (SMC 23.44.041) and King County's regulations have nuances that out-of-area builders miss. We work with these codes daily.
We Know the People
Eric has working relationships with planning department staff at Seattle DCI and King County DPER. This means faster responses and fewer surprises during review.
We Know the Land
From Capitol Hill's tight lots to Shoreline Management Act areas along the waterfront, from Beacon Hill's slopes to Northgate's transit corridors — we understand the neighborhood-level details that determine feasibility.
We Know the Market
ADU rental rates, property value impacts, and ROI calculations specific to Seattle and King County. We give you real local data, not national averages.
