Pacific Southwest Association of REALTORS serves as the South Bay's primary real estate trade organization from its Chula Vista headquarters at 880 Canarios Court, Suite 100, anchoring a 4,000-member network founded in 1928. The association's continuing-education calendar — featuring Accredited Buyer's Representative and Graduate REALTOR Institute designations — draws on the workforce-development pipeline at Southwestern College, where pre-licensing coursework feeds new agents into the South Bay market. PSAR provides MLS access through California Regional MLS, the largest multiple listing service in the nation with over 110,000 participating agents, along with Sentrilock and Supra lockbox systems, signage, and a member retail store. The organization's property-rights advocacy coordinates with the California Association of REALTORS and the National Association of REALTORS, while its Shared Services Agreement with the North San Diego County Association of REALTORS extends coverage to transactional and title-dispute counsel at The Sexton Law Firm. The 2012 merger with the East San Diego County Association of REALTORS consolidated three service centers in Chula Vista, El Cajon, and Clairemont under a single charter, creating a 12-employee operation spanning the county's southern, eastern, and central corridors.