Simi Valley Outdoor Music Rules Rules (2026): What You Need to Know

Simi Valley Municipal Code Chapter 16 broadly prohibits any use of radios, musical instruments, phonographs, amplifiers, or other sound-reproducing devices in a manner that disturbs the peace, quiet, and comfort of neighboring inhabitants. This standard applies at all hours and is not limited to nighttime. However, enforcement intensity increases significantly during the residential quiet period of 10 PM to 7 AM, when even modest sound levels that carry across property lines can result in a police response and citation.

Backyard gatherings with amplified music are among the most common noise complaints in Simi Valley. While no specific wattage or decibel threshold is codified for party sound systems, the practical enforcement standard is whether the music is audible and disturbing to a neighbor of ordinary sensibility. Bass frequencies — which carry further than mid or high-range sound — are a particular source of complaints even when the music does not seem loud at the source. Residents are advised to orient speakers away from property lines, use subwoofer attenuation after dark, and notify neighbors in advance of parties.

Commercial uses that wish to offer amplified live music or outdoor entertainment typically must obtain a Conditional Use Permit through the Planning Division, which may include conditions on hours of operation, maximum sound levels, and speaker orientation. Temporary outdoor events on public property or involving street closures require a Special Event Permit submitted to the City at least 30 days in advance. Simi Valley does not have a standalone entertainment license for music venues, so compliance with Chapter 16 and any CUP conditions is the primary regulatory mechanism.