235 Van Buren is a high-rise condominium building located in Chicago's Loop neighborhood near the Willis Tower and the 311 South Wacker Drive Building. The 46 story skyscraper was designed by Perkins & Will and built by CMK Companies, a Chicago-based real estate development company. As the building's name suggests, it is located at 235 West Van Buren Street adjacent to the Chicago River at the eastern terminus of Eisenhower Expressway.