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Last verified: · Confidence: high
What smoke and carbon monoxide alarm rules apply to landlords in Illinois?
Short answer
Carbon monoxide alarms within 15 feet of sleeping rooms; batteries working at move-in; written information
When: When the lease starts
Install approved CO alarms within 15 feet of every sleeping room, make sure batteries work when the tenant takes possession, and give one tenant per unit written information on testing and maintenance.
"Every dwelling unit shall be equipped with at least one approved carbon monoxide alarm in an operating condition within 15 feet of every room used for sleeping purposes." ilga.gov
"The owner is responsible for providing one tenant per dwelling unit with written information regarding alarm testing and maintenance." ilga.gov
"except that the owner shall ensure that the batteries are in operating condition at the time the tenant takes possession of the dwelling unit." ilga.gov
Carbon monoxide alarms within 15 feet of sleeping rooms; batteries working at move-in; written information Verified
Deadline: When the lease starts
Install approved CO alarms within 15 feet of every sleeping room, make sure batteries work when the tenant takes possession, and give one tenant per unit written information on testing and maintenance.
Who it covers: Exempt: units in buildings with no fossil-fuel heat, ventilation or hot water, no attached garage and no nearby CO source (430 ILCS 135/20).
"Every dwelling unit shall be equipped with at least one approved carbon monoxide alarm in an operating condition within 15 feet of every room used for sleeping purposes." ilga.gov
"The owner is responsible for providing one tenant per dwelling unit with written information regarding alarm testing and maintenance." ilga.gov
"except that the owner shall ensure that the batteries are in operating condition at the time the tenant takes possession of the dwelling unit." ilga.gov
Notes: 430 ILCS 135/10, 20.
Last verified 2026-10-20 · Confidence: high · Status: verified · Report a correction
Smoke detectors installed, batteries working at move-in, written testing information to the tenant Verified
Deadline: When the lease starts
Supply and install required smoke detectors (one at the top of each interior stairwell in multi-unit buildings), make sure batteries work when the tenant takes possession, and give one tenant per unit written information on testing and maintenance.
Who it covers: Battery-powered detectors that are newly installed, more than 10 years past manufacture, or failing must have a self-contained, non-removable, long-term battery (or be hard-wired), unless part of a monitored or wireless-connected system.
"It shall be the responsibility of the owner of a structure to supply and install all required detectors." ilga.gov
"The owner shall be responsible for providing one tenant per dwelling unit with written information regarding detector testing and maintenance." ilga.gov
"the owner shall ensure that such batteries are in operating condition at the time the tenant takes possession of the dwelling unit." ilga.gov
Notes: 425 ILCS 60/3(d)-(e).
Last verified 2026-10-20 · Confidence: high · Status: verified · Report a correction