MUST WATCH. Chelsea Investment Corporation, Department of Developmental Services, and San Diego Regional Center help to make a dream come true. Maria Regalado has three children, two of them are served by the SDRC. They recently moved into their brand new, affordable apartment. Chelsea, the largest affordable housing developer in San Diego and Imperial counties, built an affordable apartment project in Brawley, California. Thanks in part to the DDS investment of $1 million, 15 units were set aside for persons with developmental disabilities or families with a child with a developmental disability.