Outdoor music in unincorporated McHenry County falls under the amplification-and-music nuisance rule: live performances, stereos, or sound systems audible 100 feet or more from the lot line are prohibited. Woodstock adds firm hours, barring outdoor performances after 10:00 p.m.
There is no separate outdoor-events permit standard in the county noise ordinance; outdoor concerts, DJ sets, and backyard sound systems are governed by the same music-and-amplification provision. Any live musical performance, stereo, or amplification system whose sound carries 100 feet or more from the source's lot line is a public nuisance in unincorporated areas. Cities layer on time limits: Woodstock prohibits outdoor musical performances, amplified or non-amplified, from 10:00 p.m. to 7:00 a.m. Sunday through Thursday and from 11:00 p.m. to 7:00 a.m. Friday and Saturday. Large events may also need a special-event or liquor permit from the local jurisdiction.
Public-nuisance fine: $100 first offense, up to $1,000 for repeat offenses; each day separate. City curfews carry their own penalties.
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See how McHenry County's outdoor music rules stack up against other locations.
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