Chicago, IL Fire Regulations: Smoke Detectors (2026)
Key Facts
- Applies to
- Groups R-2, R-3, R-4, R-5, I-1
- Sleeping room rule
- Alarm within 15 ft outside, one inside
- Every story
- Including basements, not crawl spaces
- New construction power
- Building wiring + battery backup
- Attached garage
- Interconnected heat alarm required
Summary
Chicago requires smoke alarms in every sleeping room, outside sleeping areas, on every dwelling story, and at the top of interior exit stairways.
907.2.10.2 Groups R-2, R-3, R-4, R-5 and I-1. Single- or multiple-station smoke alarms shall be installed and maintained in Groups R-2, R-3, R-4, R-5 and I-1 regardless of occupant load at all of the following locations: 1. On the ceiling or wall outside of and within 15 feet (4572 mm) of each room used for sleeping purposes. 2. In each room used for sleeping purposes. 3. In each story within a dwelling unit, including basements but not including crawl spaces and uninhabitable attics... 4. At the uppermost ceiling of each interior exit stairway.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-74: Current through Council Journal of June 17, 2026).
Full Breakdown
The Chicago Fire Prevention Code amendments to the fire alarm and detection provisions (MCC § 14B-9-907, revising IFC § 907.2.10.2) require single- or multiple-station smoke alarms in Groups R-2, R-3, R-4, R-5 and I-1 occupancies, apartments, condos, single-family and multi-family housing, and similar residential/institutional uses, regardless of occupant load. Alarms must go on the ceiling or wall within 15 feet of every sleeping room, inside every room used for sleeping, on every story of the dwelling unit (including basements, but not crawl spaces or uninhabitable attics), and at the uppermost ceiling of each interior exit stairway. New construction must wire alarms to building power with battery backup (§ 907.2.10.6), and an attached garage below or adjacent to a dwelling unit needs an interconnected heat alarm or heat detector (§ 907.2.10.8).
Violations & Fines
Enforced by the Chicago Fire Department and Department of Buildings during inspections; missing or non-functioning required alarms are a Chicago Fire Prevention Code violation subject to citation and correction order, with repeat or uncorrected violations referred to the Department of Administrative Hearings.
Frequently Asked Questions
Do I need a smoke alarm in every bedroom in Chicago?
Are basements covered by Chicago's smoke alarm rule?
What if my garage is attached to my Chicago home?
Sources & Official References
Other rules in Chicago
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Smoke Detectors in Nearby Cities
How other cities in Cook County handle smoke detectors.