How Portland Handles Noise Ordinances: A Practical Guide

Portland maintains 94 local ordinances across all categories, and 10 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.

Barking Dogs

Portland City Code Sec. 5-18 prohibits owning, possessing, or harboring any dog whose 'loud, frequent, or habitual barking, howling, or yelping' disturbs the peace of any person. The first violation receives a warning; subsequent violations within six months of the warning carry a fine of $10 to $100. State law (7 M.R.S. Sec. 3950) forbids breed-specific bans but allows Portland's barking ordinance.

Key details: Code section: Portland Code Sec. 5-18 (Disturbing the peace — dogs). First offense: Warning only (no fine). Subsequent offense (within 6 months): $10 to $100 fine. Threshold: Loud, frequent, or habitual barking, howling, or yelping that disturbs ANY person. State authority: 7 M.R.S. Sec. 3950 (municipal authority; no breed-specific bans allowed).

First offense: written warning (no fine). Subsequent offense within 6 months of the warning: civil fine of $10 minimum, $100 maximum (Sec. 5-18). Persistent disturbance can also support a separate disorderly-conduct citation under Sec. 17-17 ($100 - $500) or a state Class E disorderly-conduct charge under 17-A M.R.S. Sec. 501-A.

The rules around barking dogs in Portland lean permissive, but that does not mean anything goes.

Industrial Noise

Portland Code § 17-19 bans scrap-metal loading/unloading from ships, vessels, or barges (and preparatory stacking) between 9:00 p.m. and 7:00 a.m. General industrial noise that disturbs the peace falls under the disorderly-conduct noise rule in § 17-17(c).

Key details: Scrap-metal curfew: 9:00 p.m. – 7:00 a.m. (Sec. 17-19). Curfew covers: Loading, unloading, AND preparatory stacking/piling. Shipyard exception: Vessel construction/repair/refurbishing. General industrial noise: Sec. 17-17(c) — no numeric dB cap, nuisance standard. Fine schedule: $100 / $300 / $500 (1st / 2nd / 3rd+).

Scrap-metal curfew (Sec. 17-19) and general disorderly-conduct noise (Sec. 17-17) carry the same penalty schedule under § 17-17(d): minimum $100 first offense, $300 second offense, $500 each subsequent offense, plus attorneys' fees and costs of prosecution where the City prevails. State disorderly conduct under 17-A MRS § 501-A is a Class E crime (up to 6 months / $1,000).

Vehicle Noise

Portland Code § 17-20 bans operating any vehicle on public right-of-way with a straight-pipe exhaust, cutout, bypass, or other non-compliant muffler — including motorcycles. Rapid throttle revving is separately prohibited. § 17-21 limits car burglar alarms to 10 minutes per hour (20 if actually triggered).

Key details: Straight-pipe ban: Sec. 17-20(c)(e) — includes motorcycles; cutouts/bypasses also banned. Revving prohibition: Sec. 17-20(c)(d) — 'rapid throttle advance' on public right-of-way. Fine schedule (vehicle noise): $50 / $100 / $200 / $500 (1st / 2nd / 3rd / 4th+). Burglar alarm cap: 10 min/hour (20 min if actually triggered) — Sec. 17-21(a). Alarm fines: Warning, then $50 / $100 / $300 within 365 days.

Sec. 17-20(e) fine schedule (revving, straight pipes, etc.): $50 first offense; $100 second; $200 third; $500 fourth and subsequent. Sec. 17-21(c) alarm fine schedule: warning notice first offense, then $50 second offense within 365 days; $100 third; $300 fourth or any subsequent within 365 days. State Class E disorderly conduct (17-A MRS § 501-A) and state muffler-law violations under 29-A MRS § 1912 also apply, and a Maine inspection sticker can be denied for an illegal exhaust system.

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

Quiet Hours

Portland's Code does not set fixed numeric quiet hours but prohibits loud, unnecessary noise that disturbs neighboring inhabitants 24/7 under Sec. 17-17(c). Most enforcement happens at night, and the loading of scrap metal is specifically barred between 9:00 p.m. and 7:00 a.m. under Sec. 17-19. State disorderly-conduct law (17-A M.R.S. Sec. 501-A) backs up the local rule.

Key details: Code section: Portland Code Sec. 17-17 (general noise) and Sec. 17-19 (scrap metal, 9pm-7am). Fixed quiet hours?: No numeric general quiet-hours window — 'disturb neighboring inhabitants' standard. First-offense fine: $100 minimum. State backstop: 17-A M.R.S. Sec. 501-A disorderly conduct (Class E crime).

Sec. 17-17(d): minimum fine of $100 for a first offense, $300 for a second offense, and $500 for each subsequent offense, plus the city is entitled to attorneys' fees and costs of prosecution if it prevails. Repeat violators of entertainment-licensed establishments trigger Sound Oversight Committee review (2+ complaints in 7 days, or 5+ in 30 days). State disorderly-conduct charge under 17-A M.R.S. Sec. 501-A is a Class E crime (up to 6 months jail, $1,000 fine) for refusing a police order to cease noise in a private place.

Construction Hours

Within Portland R-zones, construction noise above 50 decibels is prohibited within 500 feet of any residence, hospital, or nursing home between 7:00 p.m. and 7:00 a.m. (Sep 1 - May 31). The summer evening cutoff extends to 8:00 p.m. (Jun 1 - Aug 31). No construction may start before 8:00 a.m. on Saturdays, Sundays, or legal holidays.

Key details: Code section: Portland Code Sec. 17-18 (Construction Activities). Weekday hours (Sep 1 - May 31): 7:00 a.m. - 7:00 p.m.. Summer evening cutoff: 8:00 p.m. (Jun 1 - Aug 31). Weekend/holiday start: No earlier than 8:00 a.m. (Sat, Sun, legal holidays). Decibel threshold: 50 dB measured within 500 feet of residential/hospital/nursing-home buildings.

Construction-noise violations are prosecuted under the general disorderly-conduct penalty framework via Sec. 17-17(d): minimum $100 first offense, $300 second, $500 each subsequent offense, plus attorneys' fees and costs of prosecution if the city prevails. The Office of Building Inspections may also pursue stop-work orders for chronic violators.

Compared to other cities, Portland takes a harder line on construction hours. The enforcement and penalty structure reflects that.

Leaf Blower Rules

Portland, Maine has NOT adopted any leaf-blower-specific ordinance (no time-of-day, day-of-week, decibel, or gas-vs-electric restriction). Leaf-blower use is governed by the general disorderly-noise standard of Sec. 17-17(c) and the construction-hours rule of Sec. 17-18 if used in conjunction with landscaping work in R-zones.

Key details: Leaf-blower-specific ordinance?: None. Applicable general rules: Portland Code Sec. 17-17 (general noise) and Sec. 17-18 (R-zone construction/landscaping hours). Gas-blower phase-out?: Not adopted in Portland, Maine. Time restriction (R-zone landscaping): 7am-7pm weekdays; 7am-8pm Jun 1-Aug 31; 8am earliest start Sat/Sun/holiday.

No leaf-blower-specific penalty. General noise citations under Sec. 17-17(d) carry a $100/$300/$500 escalating fine schedule plus attorneys' fees and costs. If leaf-blower use is part of construction-related landscaping in an R-zone before 7am or after 7pm (8pm summer), Sec. 17-18 applies through the same Sec. 17-17 penalty framework.

Portland is more permissive than most cities when it comes to leaf blower rules. That said, there are still limits.

Decibel Limits

Portland's only numeric decibel limit is in Sec. 17-18: construction activity in R-zones may not exceed 50 dB measured within 500 feet of any residential, hospital, or nursing-home building during prohibited nighttime/weekend hours. All other noise is governed by qualitative 'loud and unreasonable' standards.

Key details: Numeric dB cap: 50 dB (construction only, R-zones). Measurement point: Within 500 ft of residence, hospital, or nursing home. Restricted hours (Sep 1–May 31): 7:00 p.m. – 7:00 a.m.. Restricted hours (Jun 1–Aug 31): 8:00 p.m. – 7:00 a.m.. Weekend/holiday start: No earlier than 8:00 a.m..

Construction over 50 dB outside permitted hours, or any work before 8 a.m. on a Saturday/Sunday/legal holiday, is enforced under § 17-17(d): minimum $100 first offense, $300 second offense, $500 each subsequent offense, plus attorneys' fees and prosecution costs if the City prevails. Measurement is taken at any residential, hospital, or nursing-home building within 500 feet.

Amplified Music & Events

Portland prohibits loudspeakers, amplifiers, radios, musical instruments, and phonographs operated 'in such manner as to disturb the peace, quiet and comfort of neighboring inhabitants' (Sec. 17-17(c)). Amplified sound on public rights-of-way is additionally controlled by Sec. 17-20, with escalating fines from $50 to $500. Entertainment-licensed venues are subject to Sound Oversight Committee review after multiple complaints.

Key details: Code sections: Portland Code Sec. 17-17(c) (general); Sec. 17-20 (public right-of-way). Fine — Sec. 17-17: $100 / $300 / $500 escalation. Fine — Sec. 17-20: $50 / $100 / $200 / $500 escalation. Entertainment-venue trigger: 2+ complaints in 7 days OR 5+ in 30 days = Sound Oversight Committee meeting. First Amendment: Protected speech exempt from Sec. 17-20.

Under Sec. 17-17(d): $100 first offense, $300 second, $500 each subsequent, plus attorneys' fees and costs. Under Sec. 17-20(e): $50 first offense, $100 second, $200 third, $500 fourth and subsequent. Entertainment-license holders face Sound Oversight Committee meetings and potential license non-renewal under Chapter 14 entertainment-license provisions. State disorderly-conduct charges under 17-A M.R.S. Sec. 501-A (Class E crime) are available for loud unreasonable noise from sound systems after a police order to cease.

This is not one of those rules that cities tend to ignore. Portland actively enforces its amplified music & events requirements.

Outdoor Music

Portland Code § 17-17(c) expressly prohibits playing any radio, instrument, or sound-producing device 'in such manner as to disturb the peace, quiet and comfort of neighboring inhabitants and passers-by.' The Police Department also tracks verified complaints against entertainment licensees and can refer licensees for sanction after a complaint threshold.

Key details: Authority: Portland Code § 17-17(c). Standard: 'Disturb the peace, quiet and comfort' (nuisance test). Examples cited: Radio, instrument, phonograph, loudspeaker, amplifier, yelling, shouting, singing. Licensee complaint threshold: 2 verified in 7 days OR 5 verified in 30 days (from separate individuals). Permit for music + alcohol: 28-A MRS § 1054 (entertainment permit).

Sec. 17-17(d): minimum $100 first offense, $300 second, $500 each subsequent — plus attorneys' fees and prosecution costs where the City prevails. For licensed entertainment establishments, repeated verified complaints (2+ in 7 days or 5+ in 30 days from separate individuals) trigger formal Police Department notice to the licensee and may lead to license suspension or non-renewal under Portland's entertainment-license framework. State disorderly conduct under 17-A MRS § 501-A is a Class E crime (up to 6 months jail / $1,000 fine).

Aircraft Noise

Portland has no enforceable local aircraft-noise ordinance — aircraft operations are preempted by the FAA. The Portland International Jetport (PWM) runs a voluntary 'Fly Quiet' program under an FAA-approved FAR Part 150 study and a Noise Advisory Committee.

Key details: Airport: Portland International Jetport (PWM). Federal authority: 49 U.S.C. § 40103; FAR Part 36 / Part 150. Part 150 study: First approved March 1990; update finalized March 2006. Curfew: None — voluntary 'Fly Quiet' only. Local body: Portland Noise Advisory Committee (1988).

No municipal fine — aircraft operations cannot be cited under local ordinance. Voluntary 'Fly Quiet' noncompliance is logged in semi-monthly reports to the Noise Advisory Committee but carries no penalty. Federal violations (e.g., FAR Part 91 operating rules) are enforced by the FAA Flight Standards District Office and may result in pilot certificate action.

The rules around aircraft noise in Portland lean permissive, but that does not mean anything goes.

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.