1 county-level rule, plus city-specific rules for 2 cities in Jefferson County, Colorado.
Verified from official government sources
Unincorporated Jefferson County enforces a Noise Abatement Regulation (Policy Manual Part 3, Chapter 1, Section 1; adopted by Resolution CC07-202) that mirrors Colorado's noise statute. In a residential zone, non-vehicular sound measured 25 ft from the property line may not exceed 55 dB(A) from 7:00 a.m. to 7:00 p.m. or 50 dB(A) from 7:00 p.m. to 7:00 a.m. Construction in residential zones is allowed up to 80 dB(A) day / 75 dB(A) night. Periodic, impulsive, or shrill noises are unlawful at 5 dB(A) below those limits. Enforcement: Jefferson County Sheriff's Office, 303-271-5444 (non-emergency).
2 cities in Jefferson County have their own noise ordinances rules. Each link goes to that city's dedicated page with code citations.
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Jefferson County Ordinance Hub →