How Portland Handles Noise Ordinances: A Practical Guide

Portland maintains 126 local ordinances across all categories, and 5 of those deal specifically with noise ordinances. Here is a breakdown of what the city actually requires, what is prohibited, and where Portland falls on the strict-to-permissive spectrum compared to other cities.

Decibel Limits

Portland's Land Use Code sets numeric decibel ceilings by zoning district and time of day. Table 6-H fixes daytime/evening (7 a.m.–9 p.m.) and nighttime (9 p.m.–7 a.m.) sound limits ranging from 55 dBA in the B-1 zone up to 75 dBA in the industrial I-H zone.

Key details: Quietest zone: B-1: 55 dBA day and night. Loudest zone: I-H: 75 dBA day, 55 dBA night. Daytime/evening window: 7 a.m.–9 p.m.. Night window: 9 p.m.–7 a.m.. Governing section: Land Use Code § 6.8.6(B), Table 6-H.

A use that exceeds its zone's Table 6-H limit is enforceable as a Land Use Code violation under Section 1.5.1's Building Authority and Code Enforcement Officer authority, with fines of $100 to $500 per day under Code of Ordinances Section 1-15. Complaints are resolved with an on-site sound-level-meter reading taken at the measurement point Section 6.8.6(C) specifies for the zone: the lot boundary for most zones, or the nearest residential zone boundary for industrial uses.

Quiet Hours

Portland bars loud construction work near homes, hospitals, and nursing homes during set overnight hours: 7:00 p.m. to 7:00 a.m. from September through May, 8:00 p.m. to 7:00 a.m. in summer, and never before 8:00 a.m. on weekends or legal holidays. The cap applies within 500 feet of residential or care buildings in the city's R-zones.

Key details: Winter cutoff: 7:00 p.m.–7:00 a.m., Sept 1–May 31. Summer cutoff: 8:00 p.m. start, June 1–Aug 31. Weekend/holiday floor: no start before 8:00 a.m.. Coverage area: within 500 ft of homes, hospitals, nursing homes. Noise threshold: over 50 decibels.

Running noise-generating construction equipment during the restricted overnight hours, or before 8:00 a.m. on a weekend or legal holiday, violates Section 17-18 and is enforceable by the city; general disruptive noise elsewhere is covered separately under the disorderly-conduct penalties of Section 17-17(d), which start at a $100.00 minimum fine for a first offense.

Vehicle Noise

Portland bans creating noise on any public right-of-way that draws attention to its source, expressly naming rapid throttle revving and motor vehicles with straight-pipe or cutout exhaust systems under Sec. 17-20. Penalties escalate from $50 for a first offense to $500 for a fourth, enforced citywide regardless of the specific street.

Key details: Governing section: Portland Code of Ordinances § 17-20. First offense fine: $50.00. Fourth+ offense fine: $500.00. Prohibited: Rapid throttle revving; straight-pipe/cutout exhaust. Applies to: Any public right-of-way citywide.

A vehicle noise violation under Sec. 17-20, revving that draws attention, or running a straight-pipe, cutout or non-compliant exhaust on a public street, carries an escalating fine: $50.00 for a first offense, $100.00 for a second, $200.00 for a third, and $500.00 for a fourth or later offense.

This is not one of those rules that cities tend to ignore. Portland actively enforces its vehicle noise requirements.

Amplified Music & Outdoor Sound

Licensed outdoor entertainment in Portland must shut down by midnight Sunday through Thursday and by 1 a.m. Friday and Saturday, unless the venue holds an Expanded Entertainment Addendum. The rule sits in Chapter 4's entertainment-licensing division alongside a decibel cap.

Key details: Sun-Thu outdoor cutoff: Midnight. Fri-Sat outdoor cutoff: 1 a.m.. Earliest start: 8 a.m.. First-offense fine: $500 (Sec. 4-58). Oversight body: 4-member Sound Oversight Committee.

Operating outdoor entertainment past the licensed hours, or exceeding 85 dBA/95 dBC without an Expanded Entertainment Addendum, draws a $500 fine for a first offense, $1,000 for a second, and $2,000 for a third or subsequent offense under Sec. 4-58, plus possible license suspension or revocation and referral to the Sound Oversight Committee under Sec. 4-57.1.

Construction Hours

Construction noise above 50 decibels is barred in Portland's residential zones between 7:00 p.m. and 7:00 a.m. from September through May under Sec. 17-18(a); the evening cutoff moves to 8:00 p.m. from June through August. No construction activity of any kind may start before 8:00 a.m. on a Saturday, Sunday or legal holiday.

Key details: Decibel limit: 50 dBA in R-zones, Sec. 17-18(a). Sept–May quiet hours: 7:00 p.m.–7:00 a.m.. June–Aug quiet hours: 8:00 p.m.–7:00 a.m.. Weekend/holiday rule: no start before 8:00 a.m.. Buffer distance: within 500 ft of residential/hospital/nursing use.

Running noise-generating construction above the 50-decibel threshold in an R-zone during the barred evening-to-morning window, or starting any construction before 8:00 a.m. on a Saturday, Sunday or legal holiday, violates Sec. 17-18(a) unless the emergency-repair or unique-activity exception in Sec. 17-18(c) applies with the required advance notice to the Public Works Authority.

The Bottom Line

Portland's noise ordinances rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Portland is broadly strict or permissive.

These rules come from Portland's publicly available municipal code. For complete penalty schedules, exemption details, and answers to common questions, see the individual ordinance pages throughout this guide.