Quiet hours in Boulder, CO — also called the noise ordinance, nighttime noise rules, or residential quiet time — define the hours during which excessive noise is prohibited.
Boulder enforces quiet hours 11 PM to 7 AM weekdays, midnight to 8 AM weekends. The Hill neighborhood near CU campus sees heightened enforcement for party noise.
Boulder Revised Code Chapter 5-7 establishes noise standards with specific decibel limits. Quiet hours are 11 PM to 7 AM weekdays, midnight to 8 AM weekends. Residential limits are 55 dBA daytime, 50 dBA nighttime at the property line. The Hill neighborhood and University Hill area near CU Boulder campus receive enhanced enforcement due to student gatherings. Nuisance house ordinance applies to properties with repeated noise violations. Pearl Street Mall has separate noise rules for buskers and amplified music.
First offense: $100 fine. Repeat violations: $200 to $500. Nuisance house designation: fines escalate to $1,000+ with possible court action.
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See how Boulder's quiet hours rules stack up against other locations.
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