Coldwell Banker Residential Brokerage in Chicago has announced the acquisition of Realty Stars in Chicago. The formerly independently owned and operated company will now do business under the banner of Coldwell Banker Residential Brokerage. Realty Stars’ single office on N. Harlem Avenue will merge with the existing Coldwell Banker Residential Brokerage office located across the street and operate from 4950 N. Harlem Ave.