Lee County, FL Noise from Specific Sources: Car Alarm Limits (2026)

The Lee County Noise Control Ordinance, Sec. , otherwise caps sound at the real property line of the receiving land: 55 dBA at night and 66 dBA by day for residential areas, with similar tiered limits for commercial and industrial land under Table 1 of Sec. 19-151(1). Section 19-152 lists nine categories of sound that will not be considered a violation of the article, and the sixth exempts noise resulting from safety features required by law for equipment or operations, including, but not limited to, backup alarms or vehicle motion alarms.

That means a factory-installed or aftermarket car alarm going off as its intended safety function, whether triggered by a break-in attempt or a vehicle motion sensor, cannot be cited under the county's dBA or dBC limits. The exception sits alongside similar carve-outs for emergency sirens, utility repair noise, railway and airport noise, and farm operations. It does not exempt every sound a vehicle makes; a car stereo, or an alarm malfunctioning for hours outside its safety function, can still be evaluated under the separate noise-disturbance standard in Sec. 19-151(2), which lets the Sheriff's Office weigh volume, duration, time of day and proximity to residential sleeping areas on a case-by-case basis.