McHenry County, IL Fire Regulations: Smoke Detectors (2026)
Key Facts
- Placement
- Within 15 ft of bedrooms
- Coverage
- Every story incl. basement
- Battery since 2023
- Sealed 10-year
- Landlord duty
- Supply and install
- Fine
- Up to $100
Summary
Illinois law requires a working smoke detector within 15 feet of every sleeping room and on every story of a home, including basements. Since January 1, 2023, newly installed alarms must have sealed 10-year batteries.
Every dwelling unit or hotel shall be equipped with at least one approved smoke detector in an operating condition within 15 feet of every room used for sleeping purposes. Every single family residence shall have at least one approved smoke detector installed on every story of the dwelling unit, including basements but not including unoccupied attics.
Full Breakdown
The Smoke Detector Act (425 ILCS 60/3) applies statewide, including McHenry County. Every dwelling unit must have at least one approved smoke detector within 15 feet of every room used for sleeping, and every single-family residence must have one on every story, including basements but excluding unoccupied attics. As of January 1, 2023, any newly purchased or installed alarm in a home without hardwired or wireless-integrated alarms must use a non-removable, non-replaceable 10-year sealed battery. Homes with hardwired or low-voltage alarms are exempt from the sealed-battery mandate. Landlords supply and install the alarms; tenants test and maintain them.
Violations & Fines
Owners who fail to provide compliant alarms may receive a 90-day notice to comply and, after that period, fines of up to $100 per violation.
Frequently Asked Questions
Do I need 10-year sealed-battery smoke alarms?
Where must smoke alarms be placed?
Sources & Official References
Other rules in McHenry County
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