Sun Prairie, WI Noise Ordinances: Quiet Hours (2026)
Quiet hours in Sun Prairie, WI, also called the noise ordinance, nighttime noise rules, or residential quiet time, define the hours during which excessive noise is prohibited.
Key Facts
- Quiet hours
- 10 p.m. to 7 a.m.
- Standard
- Plainly audible at property line
- Residential nighttime sound limit
- 50 decibels (§ 8.32.030)
- Commercial zone limit (day/night)
- 70 decibels
- All other zoning districts
- 75 decibels
- Hardship exemption
- Available from common council
Summary
Sun Prairie sets a ten p.m. to seven a.m. quiet-hours standard: a radio, phonograph or similar device that is plainly audible at the property line during those hours is automatic evidence of a violation under Code Section 8.32.020(B).
B.Radios—Phonographs—Similar Devices. The using, operating or permitting to be played, used or operated any radio receiving set, musical instrument, phonograph or other machine or device for the producing or reproducing of sound in a loud and unnecessary manner. The operation of any set, instrument, phonograph, machine or device between the hours of ten p.m. and seven a.m. in a manner as to be plainly audible at the property line of the building, structure or vehicle in which it is located shall be prima facie evidence of a violation of this section.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 71).
Full Breakdown
020(B) targets radios, phonographs and similar sound-producing devices directly, prohibiting their use in a loud and unnecessary manner at any hour. so that it is plainly audible at the property line of the building, structure or vehicle where it sits is prima facie evidence of a violation, meaning the city does not have to prove intent or measure decibels to establish the offense during those hours. 030, which set maximum sound pressure levels of fifty decibels at night in residential zones, seventy decibels in commercial zones, and seventy-five decibels in all other zoning districts, measured at the property line and increased by five decibels above ambient before being deemed excessive.
Anyone cited for exceeding residential nighttime limits can be ordered by the monitoring officer to reduce sound pressure immediately, and the common council can grant a hardship exemption on evidence that reasonable technological fixes have already been attempted.
Violations & Fines
A quiet-hours violation under Section 8.32.020(B) or the stationary limits of Section 8.32.030 is punished under the citywide general penalty, Section 1.24.010: a first offense forfeits five to five hundred dollars plus prosecution costs, a second offense within a year forfeits twenty to one thousand dollars, and each day of continuing noise is a separate violation.
Frequently Asked Questions
What are Sun Prairie's quiet hours for playing music at home?
What is the nighttime decibel limit in a Sun Prairie residential zone?
Can I get an exception to Sun Prairie's noise limits?
Sources & Official References
Other rules in Sun Prairie
How Sun Prairie compares: Cities with the Strictest Noise Ordinances·Compare Sun Prairie to another location·View the Wisconsin noise ordinances overview
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Quiet Hours in Nearby Cities
How other cities in Dane County handle quiet hours.