Emerald ADU Builders is a Seattle-based construction firm specializing in accessory dwelling unit design, permitting, and full turnkey construction, with a notable capability to complete detached ADUs (DADUs) in approximately three months. The company offers end-to-end services including ADU consultation, ADA-compliant design and planning, permitting assistance, and cost estimates, positioning itself as a single-point resource for homeowners navigating King County's lengthy permitting process. Their focus on streamlined project delivery and reasonable pricing differentiates them in the Pacific Northwest ADU market.