Quiet hours in San Bernardino County, CA — also called the noise ordinance, nighttime noise rules, or residential quiet time — define the hours during which excessive noise is prohibited.
San Bernardino County enforces quiet hours from 10 PM to 7 AM in unincorporated areas under Development Code §83.01.080. Residential exterior noise limits are 55 dBA daytime (7 AM–10 PM) and 45 dBA nighttime (10 PM–7 AM).
Development Code §83.01.080 establishes noise standards for all unincorporated areas of San Bernardino County — the largest county in the US by area at 20,105 square miles. Residential receivers have exterior noise limits of 55 Leq dBA from 7 AM to 10 PM and 45 Leq dBA from 10 PM to 7 AM. The code uses a tiered exceedance system: noise exceeding the standard by up to 5 dBA is allowed for no more than 15 minutes per hour, +10 dBA for no more than 5 minutes, +15 dBA for no more than 1 minute, and +20 dBA for any period is prohibited. Enforcement varies across the county's diverse geography — desert communities may have different ambient noise levels than mountain or valley areas. Code Enforcement handles complaints at (909) 884-4056 or (760) 995-8140.
Violation of §83.01.080: up to 90 days jail and/or $400 fine. Code Enforcement citations may be issued per day the violation exists.
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See how San Bernardino County's quiet hours rules stack up against other locations.
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