Accessory Dwelling Unit (ADU) design and construction compliant with California ADU laws (SB 9, SB 68, SB 1123). EDR Design Build provides turnkey ADU solutions including architectural design optimized for code compliance, permitting coordination with local jurisdictions, construction management, and final inspection. ADUs serve as guest houses, in-law quarters, rental income properties, or long-term housing solutions. Typical ADU sizes 400-800 sq ft with project costs ranging from $150K-$400K depending on configuration and finish levels.