Introducing Our 4-Hour Call-Back Guarantee. When you list your home with Coldwell Banker Carlson, you'll never wonder what your agent is doing to sell your home. That's because we GUARANTEE to call you back within 4 business hours. If we don't, you can CANCEL your agreement with us. NO QUESTIONS ASKED. Try us out. Give us a call and start your stopwatch. 914-337-3141 or 914-779-4100 property@cbcarlson.com Big Enough to Market to the World. Small Enough to Understand Yours.