Aurora, CO Noise Ordinances: Quiet Hours (2026)
Quiet hours in Aurora, CO, also called the noise ordinance, nighttime noise rules, or residential quiet time, define the hours during which excessive noise is prohibited.
Key Facts
- Residential night limit
- 45 dBA, 9pm–7am
- Residential day limit
- 55 dBA, 7am–9pm
- Loudspeaker/PA curfew
- 10pm–7am, permit required
- Governing instrument
- UDO, not City Code Ch. 146
- General nuisance backstop
- City Code § 94-107, 24/7
Summary
Aurora's UDO sets lower nighttime decibel limits citywide and bars loudspeakers and PA systems near homes from 10 p.m. to 7 a.m. without a temporary permit.
E. Noise. All activities shall comply with the maximum noise standards in this Subsection E unless another provision of this UDO or another City regulation applies a different standard... c. Using or operating any loudspeaker, public address system, or similar device between the hours of 10:00 p.m. and 7:00 a.m., in a manner that creates a noise disturbance to a residential real property boundary is prohibited, unless the activity is authorized by a temporary permit.
Official source re-checked September 8, 2026: no newer edition of the code had been published (publisher’s edition: current through Ordinance 2026-30, passed June 22, 2026).
Full Breakdown
Aurora's Unified Development Ordinance caps noise reaching residential property at 45 dBA between 9 p.m. and 7 a.m., versus 55 dBA in daytime (Table 4.11-1): a built-in nighttime curfew rather than a separate quiet-hours clock. Separately, running a loudspeaker or PA system in a way that disturbs a residential boundary between 10:00 p.m. and 7:00 a.m. is flatly prohibited unless a temporary permit authorizes it. A general 'unreasonably loud noise' nuisance ban also runs around the clock under City Code § 94-107.
Violations & Fines
Enforceable as a zoning/UDO violation citywide; loudspeaker use after 10 p.m. without a permit or exceeding nighttime dBA limits at a residential line can bring code enforcement action independent of the general noise-nuisance citation under § 94-107.
Frequently Asked Questions
Is there a set quiet-hours window in Aurora, Colorado?
Can I run outdoor speakers at a party at night?
Sources & Official References
Other rules in Aurora
How Aurora compares: Cities with the Strictest Noise Ordinances·Compare Aurora to another location·View the Colorado noise ordinances overview
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Quiet Hours in Nearby Cities
How other cities in Arapahoe County handle quiet hours.