Skip to main content
CityRuleLookup
Key FactsOrdinance TextFull BreakdownViolationsFAQSourcesMore in Longmont

Longmont, CO Noise Ordinances: Amplified Music & Outdoor Sound (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified August 2026

Amplified music rules in Longmont, CO, also called sound permit, PA system, or live music ordinances, set decibel limits, time-of-day restrictions, and when permits are required.

Key Facts

Trigger distance
Audible 25 feet from source
Legal status
Prima facie unreasonable noise
Enforcement
Public nuisance, injunction available
Event exception
80 dB(A) at permit perimeter

Summary

Longmont treats amplified sound audible 25 feet from its source, or inside a private residence, as unreasonable noise and a public nuisance under its general noise ordinance.

Amplified sound, as defined at section 13.37.020 , audible 25 feet from the source of said sound or within a private residence that the person responsible for the sound has no right to occupy; B. Nonlicensed motor vehicle engines, nonvehicular engines and electric and pneumatic tools operated between 10:00 p.m. and 7:00 a.m.

View official code

Full Breakdown

Under § 10.20.090, amplified sound audible 25 feet from the source, or within a private residence the listener has no right to occupy, is deemed prima facie unreasonable noise, alongside loud parties and late-night power tools. Enforcement runs through the city's general unreasonable-noise standard, which is a person-of-ordinary-sensitivities test rather than a decibel meter reading. The section also sets a special-event carve-out, letting permitted outdoor events run amplified sound up to 80 decibels at the permit perimeter.

Violations & Fines

Violation is a public nuisance; the city attorney can seek an injunction, and it is enforceable under the general penalty provisions for Code violations.

Frequently Asked Questions

How loud can amplified music be in Longmont without a permit?
If it's audible 25 feet from the source, or inside a neighbor's home, it's treated as prima facie unreasonable noise under Longmont Municipal Code § 10.20.090, regardless of decibel level.
Is there an exception for permitted outdoor events?
Yes. Amplified sound of 80 decibels or less, measured at the perimeter of a special-event use-of-public-places permit issued under chapter 13.37, does not count as unreasonable noise.

Sources & Official References

Other rules in Longmont

Quiet HoursSome RestrictionsConstruction HoursSome RestrictionsLeaf Blower RulesSome RestrictionsAircraft NoiseLight RestrictionsBarking DogsSome RestrictionsVehicle NoiseSome RestrictionsDecibel LimitsSome RestrictionsParking Rules: Driveway RulesSome RestrictionsParking Rules: Abandoned VehiclesSignificant RestrictionsParking Rules: Loading ZonesSome RestrictionsFence Regulations: Fence Permit RequirementsSome RestrictionsFire Regulations: Propane StorageSome RestrictionsFire Regulations: FireworksSignificant Restrictions

All Longmont rules

Compare Longmont to another location·View the Colorado noise ordinances overview

Get notified when Amplified Music & Outdoor Sound in Longmont, CO changes

We'll email you the moment we detect a change in the code. No spam, unsubscribe anytime.

We'll never sell or share your email. One-click unsubscribe in every email.

See something wrong?

Help us keep this page accurate. If you notice an error or outdated information, let us know.

Amplified Music & Outdoor Sound in Nearby Cities

How other cities in Boulder County handle amplified music & outdoor sound.

Boulder, CO
Some Restrictions