San Marcos Real Estate Info2 homes for sale in San Marcos, CA. Find San Marcos real estate agents, and San Marcos house values. Get access to San Marcos listings, top San Marcos REALTORS, new homes and foreclosures. Our free real estate services feature all San Marcos and nearby towns. We also have information on mortgages, insurance, movers and other services for anyone looking to buy or sell a home in San Marcos.