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The Resolution Path
Step 1 of 3Hillsboro, OR
Noise Ordinance Overview
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Official Decibel Limits
volume_up"Limits vary based on the zone of the noise producer and receiver, measured at the property line closest to the sound source using an A-weighted scale. Industrial to Industrial is 70 dBA day and night."
AI Executive Summary
Hillsboro, OR, Municipal Code 6.24 prohibits unauthorized, disturbing, or unnecessary noise, with specific decibel limits varying by zoning district and time of day. Quiet hours are from 9 PM to 6 AM daily, during which lower sound levels apply. Violations are subject to a $500 penalty per day, with additional remedies for ongoing nuisances.
Specific Noise Restrictions
Construction
Prohibited between 9 p.m. and 6 a.m. in or adjacent to residential/business districts, unless for urgent public safety with a permit. Industrial, agricultural, or construction activities (other than demolition) are generally exempt between 6 a.m. and 9 p.m. Domestic tools like lawnmowers are allowed 6 a.m. to 9 p.m. Mon-Fri, and 8 a.m. to 6 p.m. Sat-Sun.
Amplified Sound
Unlawful if noise levels exceed HMC 6.24.030 limits. For outdoor facilities, sound levels at the perimeter must not exceed maximum limits. If authorized by the city manager to exceed limits, amplified sound is restricted to 50 minutes of each hour, four hours of any eight-hour block on weekends, and three hours between 4 p.m. and 9 p.m. on weekdays. Community groups may receive exceptions.
Animals
Under Washington County Animal Code 6.04.260(3), it is a Class C Civil Infraction for a dog owner to allow a dog to cause continuous annoyance for a total of five or more minutes out of any fifteen-minute period.
Vehicles
Prohibits sounding a horn except as a danger signal, using exhaust brakes except in emergencies, and operating a motor vehicle that creates loud or unnecessary sounds (grating, grinding, rattling). Working on a car in the street is also prohibited.
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