Noise from Specific Sources in Hillsboro, OR (2026)
3 verified noise from specific sources rules for Hillsboro, Oregon, sourced directly from the municipal code and official government pages.
Verified from official government sources
HVAC & Mechanical Noise
Hillsboro caps noise from air conditioners, heat pumps and other mechanical equipment under its general sound ordinance: 60 dBA in daytime hours and 50 dBA overnight, measured at the property line closest to the source.
Hillsboro HVAC Equipment Noise Limits
Some RestrictionsHillsboro Municipal Code § 6.24.030
it is unlawful for any person to produce or allow to be produced, with or from a sound-producing source, sound that exceeds the limits in Table 6.24.030-A: Table 6.24.030-A, Noise Limits Zone of Noise Producer Zone of Noise Receiver Night (between 9 p.m. and 6 a.m. the following day) Day (between 6 a.m. and 9 p.m.) Industrial (I-G, I-P and I-S) Industrial (I-G, I-P and I-S) 70 dBA 70...
Car Alarm Limits
Hillsboro's noise ordinance exempts bona fide alarm systems, including vehicle alarms, from the city's decibel limits, so a car alarm sounding as genuine theft protection isn't a code violation on its own.
Hillsboro Car Alarm Noise Exemption
Few RestrictionsHillsboro Municipal Code § 6.24.050(C)
Sounds caused by bona fide use of emergency warning devices and alarm systems.
Delivery Truck Noise
Hillsboro's noise ordinance exempts sounds caused by regular vehicular traffic on premises open to the public, so ordinary delivery truck activity, engines, backup alarms, loading, is not a citable noise violation.
Hillsboro Delivery Truck Noise Exemption
Few RestrictionsHillsboro Municipal Code § 6.24.050(G)
Sounds caused by regular vehicular traffic upon premises open to the public;H.Sounds caused by air-, electric- or gas-driven domestic tools, including lawn mowers and edgers, radial arm, circular and table saws, and other similar lawn or construction tools, excluding tools used for vehicle repair, between 6:00 a.m. and 9:00 p.m., Monday through Friday and between 8:00 a.m. and 6:00 p.m., Saturd...
Looking for Washington County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Hillsboro city rules.
Noise from Specific Sources in Washington County →