Service Areas and Specialties Backed by over 2,000 Sales Associates in 25 offices, Coldwell Banker Gundaker serves more than 200 communities throughout St. Louis City and County, St. Charles, Jefferson, Franklin, Warren, and Lincoln Counties and most of east central Missouri. As a team, we'll make it happen. From the home search process to financing, to title insurance, and more — straight through to the final closing of your transaction — make ... Show more