Noise Ordinances in Boulder, CO (2026)

Boulder Revised Code § 5-9-6(b)

(b)Unreasonable Unamplified Noise:(1)Between the hours of 11 p.m. and 7 a.m., while on public property within a residential district, no person shall yell, scream, shout, cheer, sing, or otherwise make noise with the human voice louder than that which is reasonably necessary for normal conversational speech.(2)It shall be an affirmative defense to a charge of violating this subsection that the ...

Boulder Revised Code § 5-9-7(b)

5-9-7. Between the hours of 9:00 p.m. through 7:00 a.m., no person shall: ... (b)Construction in a Residential Zone: In a residential zone, use power tools which are audible off the property upon which they are being used as part of construction work for which a building permit has been issued or is required for the work.

Boulder Revised Code § 6-1-19(a)-(d)

(a)No person owning or keeping any animal shall fail to prevent such animal from disturbing the peace of any other person by loud and persistent or loud and habitual barking, howling, yelping, braying, whinnying, crowing, calling, or making any other loud and persistent or loud and habitual noise, whether the animal is on or off the guardian's or keeper's premises.(b)No person shall be charged ...

Boulder Revised Code § 5-9-7(a)

5-9-7. - Unreasonable Noise Prohibited Between the Hours of 9:00 p.m. Through 7:00 a.m. - Lawn Mowers, Leaf Blowers, and Construction. Between the hours of 9:00 p.m. through 7:00 a.m., no person shall: (a)Lawn Mowers and Leaf Blowers: Operate any lawn mower, leaf blower, or other power lawn or gardening tool on any private property within, or within one hundred feet of the boundary of, any resi...

Boulder Revised Code § 5-9-6(a)

(a)Unreasonable Amplified Noise:(1)Nighttime Hours: Between the hours of 11 p.m. through 7 a.m., no person shall electronically amplify any sound, or make any noise by means of any electronic amplifier, which is loud enough to be audible to a person of normal hearing:(A)One hundred or more feet beyond the property line of the property upon which the loudspeakers are located where they are locat...

Boulder Revised Code § 9-3-10

The purpose of this section is to enact an airport influence overlay zone map and associated regulations, providing for certain land development controls on the area surrounding the airport which may be affected by aircraft accidents and by noise, vibrations, fumes, dust, smoke, fuel particles and other annoyances and influences from airport operations...(e)(1)(A)A person annexing to the city a...

Boulder Revised Code § 5-9-3

(a)No person shall: (1)Operate any type of vehicle, machine, or device; (2)Carry on any activity; or (3)Promote or facilitate the carrying on of any activity, which makes sound in excess of the level specified in this section. (b)Sound from any source, other than a moving vehicular source located within the public right of way, shall not exceed any of the following limits for its appropriate zo...

Boulder Revised Code §§ 5-9-4, 5-9-8

5-9-4(a) Sound from a motor vehicle located within the public right of way shall not exceed eighty decibels on the "A" weighting scale (dBA), except that sound from a vehicle with a manufacturer's gross weight rating of ten thousand pounds and above may exceed eighty dBA but shall not exceed eighty-eight dBA. Such sound shall be measured at a distance of at least twenty-five feet from a vehicle...