Chicago, IL Noise from Specific Sources: Car Alarm Limits (2026)
Key Facts
- Alarm cutoff
- 4 minutes after activation
- First offense fine
- $50.00
- Second offense fine
- $75.00
- Third+ offense fine
- $100.00
- Roadway violation
- Declared a public nuisance
- Enforcement remedy
- Tow to city vehicle pound
Summary
Chicago requires every vehicle alarm to shut itself off within four minutes of triggering and stay silent until reset. Alarms lacking an automatic shutoff and reset mechanism cannot legally be installed, maintained, or operated on city roadways.
(a) In any vehicle equipped with a continuous or intermittent audible signal device which acts as a burglar alarm, such device shall be limited in operation to four minutes after activation and shall be incapable of further operation until reset to become active again... (c) Any person who violates this section shall be subject to a fine of $50.00 for each offense. Any person who violates this section a second time shall be subject to a fine of $75.00, any person who violates this section a third or subsequent time shall be subject to a fine of $100.00. Each installation and each use of an alarm in violation of this section shall constitute a separate and distinct offense... A violation of this section on a roadway is hereby declared a public nuisance which may be abated by removing such vehicle to a city vehicle pound or authorized garage.
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
Municipal Code of Chicago § 9-76-150 governs any vehicle equipped with a continuous or intermittent audible signal device acting as a burglar alarm. Subsection (a) caps operation at four minutes after activation and requires the device to become incapable of further operation until it is reset. Subsection (b) makes it unlawful to install or maintain such a device in any vehicle registered in the city, or to operate or park on any roadway a vehicle so equipped, unless the alarm carries both an automatic shut-off mechanism that ends the sound after four minutes and an automatic reset mechanism before it can sound again.
There is a built-in exception in subsection (c): running past four minutes is not a violation if the alarm was triggered by an actual unauthorized opening of the hood, trunk, or door, or by breaking a window, and the extended sounding was caused by that intrusion. The section also declares a roadway violation a public nuisance, letting the city abate it by towing the vehicle to a city vehicle pound or an authorized garage rather than waiting for the owner to respond.
Violations & Fines
Fines escalate per offense under § 9-76-150(c): $50.00 for a first violation, $75.00 for a second, and $100.00 for a third or subsequent violation. Each installation and each use of a noncompliant alarm counts as a separate, distinct offense, so a single malfunctioning alarm can generate repeated citations. A roadway violation is also a declared public nuisance, giving the city authority to tow the offending vehicle to a city pound or authorized garage in addition to the fine.
Frequently Asked Questions
Can my car alarm legally sound for more than four minutes?
What happens if my parked car's alarm keeps going off on a Chicago street?
Does the shutoff requirement apply to installing the alarm or just using it?
Sources & Official References
Other rules in Chicago
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Car Alarm Limits in Nearby Cities
How other cities in Cook County handle car alarm limits.