Illinois State Statute 425 ILCS 60/ and local regulations require smoke detectors be installed in residential occupancies. Based on these rules, there should be a smoke detector on each level of your home, including the basement. Smoke detectors should be located within 15 feet of a sleeping area. Smoke detectors are not required in unfinished, unoccupied attic spaces.

Illinois State Statute 430 ILCS 135/ and local regulations require a carbon monoxide detector within 15 feet of each sleeping area. Combination smoke and carbon monoxide detectors can be utilized to meet the 15 feet of a sleeping area requirement found in both statutes.s.