Coldwell Banker, a real estate brokerage, has had an office in Croton just south of the A & P shopping center for more than 20 years. The office has 35 agents that cover listings in Croton, Cortlandt, Peekskill, Ossining and Yorktown. As a corporate entity, Coldwell Banker has been in business for more than 100 years. The office covers homes and apartment complexes for both owners and renters.