Brentwood is a city in Contra Costa County, California, United States. It is located in the East Bay region of the San Francisco Bay Area. The 94513 zip code is located in the Brentwood community of California in Contra Costa county. You can learn more about Real Estate in Brentwood CA 94513 below, including current Homes For Sale: Condos, Townhomes, Foreclosures and Bank Owned Properties, Short Sales and more. Our Local Brentwood CA Realtors can assist you with selling your home in California or buying your next piece of Real Estate in or around the Brentwood CA 94513 community. Be sure to check out our FREE Instant Home Value wizard to get a quick report on your homes current estimated value.