Castle Sign & Post Installation installs real estate sign posts in the Los Angeles & Orange County areas which includes the following California cities: Bellflower, Carson, Cerritos, Compton, Downey, Fullerton, Harbor City, Hawaiian Gardens, Hawthorne, Huntington Beach, Inglewood, Irvine, Lake Forest, Lakewood, Long Beach, Los Alamitos, Los Angeles, Lynwood, North Hollywood, Norwalk, Ontario, Orange, Paramount, San Clemente, San Pedro, Santa Monica, Signal Hill, South Gate, Whittier & Wilmington.