With over 350 completed additions and custom builds, West Coast ADUs in Santee holds CSLB license #655559 under the B-General Building classification for full-service accessory dwelling unit design and construction. New ADU construction requires plumbing rough-ins that meet California's Title 24 energy standards, a compliance scope that connects with licensed plumbing firms such as Expert Plumbing and Repipe on permitted residential builds. The company handles the full project arc from architectural design and city permitting through foundation, framing, mechanical, and finish work for detached ADUs, garage conversions, and attached additions. Interior finishing for each unit includes flooring installation across kitchens, bathrooms, and living areas, a stage coordinated with flooring specialists including Village Flooring & Renovations for material-specific installs. Highest-scope projects involve 1,200-square-foot detached ADUs requiring independent utility connections, separate electrical panels, dedicated HVAC systems, and full Title 24 energy-compliance documentation for City of San Diego permitting.