ADU builders · Seattle, Washington
Vetted, public-records-checked ADU builders serving Seattle. We never publish builder photos or marketing copy without permission — listings sourced from public business directories are clearly marked.
Sourced from public business directories. If you own one of these businesses, claim your listing.
Seattle and Eastside ADU and DADU builder creating designs that blend with local styles.
Serves: Seattle
Seattle ADU and DADU contractor offering construction, design, and planning services.
Serves: Seattle
Seattle ADU and DADU design studio offering custom and pre-designed plans.
Serves: Seattle
Passive-house-certified Seattle ADU/DADU builder of energy-efficient backyard cottages.
Serves: Seattle
Seattle DADU and custom home builder specializing in detached accessory dwelling units.
Serves: Seattle
Permit info for Seattle
Real permit fees, timelines, and ADU-specific rules for Seattle.
View Seattle permit guide →Tell us about your project — budget, timeline, ADU type — and we'll route you to up to three verified builders in your area.