Coldwell Banker Realty Coldwell Banker United,, is a Texas real estate firm, located at 2501 Ranch Road 620 S #120, Austin, TX 78738. Coldwell Banker Realty Coldwell Banker United, provides a wide-range of real estate services. Consumers continue to find value in having a real estate professional help them through the home buying and selling process. The wide variety of services real estate professionals provide are proving ever more valuable in real estate transactions(financing twists and sales contract intricacies). Please view Coldwell Banker Realty Coldwell Banker United, current listings or sold listings. Recently serving clients in areas Copperfield Area.