For a condo association, you will generally need smoke detectors installed in the following locations: (Refers to common areas only) Stairwells: One unit required at the top of each stairwell.Basement: One unit should be installed in the basement.Electrical Rooms: One unit should be installed to protect these areas.Elevator Rooms: One unit should be installed. The sections of the Chicago Building Code related to smoke detectors are as follows: 13-64-130 Smoke detectors – Location. Not less than one approved smoke detector shall be installed in every single-family residential unit and multiple dwelling units as defined in Chapter 13-56, Sections 13-56-020, 13-56-030 and...