Noise from Specific Sources in Loudoun County, VA (2026)
2 rules for unincorporated Loudoun County, Virginia.
Verified from official government sources
Car Alarm Limits
Loudoun County bans sounding a vehicle horn, signaling device, or alarm on any street or public place for more than twenty consecutive seconds, whether continuous or intermittent, unless it's a genuine danger warning or permitted under state law. An alarm that keeps blaring 15 minutes after a deputy arrives and the owner can't be found lets the officer have the vehicle towed.
Loudoun County Car Alarm Noise Time Limit
Some RestrictionsLoudoun County, VA Code of Ordinances § 654.02(d)(6)
The sounding of any horn or signaling device/alarm on any motor vehicle, motorcycle, bicycle, or other vehicle on any street or public place of the county, continuously or intermittently for more than twenty consecutive seconds, except as a danger warning or as permitted by state law. If such signaling device/alarm sounds continuously for 15 minutes after the arrival of a law enforcement office...
Generator Noise
Loudoun County's noise ordinance exempts sound from power generators run during power outages and other emergencies, so a backup generator keeping the lights on after a storm doesn't violate the county's excessive-sound rules. The carve-out sits inside the broader emergency-operations exemption at Code §654.02(e)(4).
Loudoun County Generator Noise Outage Exemption
Few RestrictionsLoudoun County, VA Code of Ordinances § 654.02(e)(4)
Emergency operations including but not limited to, audible signal devices which are employed as warning or alarm signals (other than vehicle alarms) in the event of an emergency, including sirens, loud speakers, or sound produced by power generators during power outages and other emergency situations.
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