St. Peters, MO Noise Ordinances: Construction Hours (2026)
Construction hours in St. Peters, MO, sometimes called construction noise rules or contractor work-hour ordinances, set when contractors can run power tools, hammers, and heavy equipment.
Key Facts
- Residential noise cap
- 65 dBA at property line
- Summer weekday hours
- 6:30 AM-6:00 PM (Jun-Aug)
- Other weekday hours
- 7:00 AM-6:00 PM
- Saturday hours
- 8:00 AM-6:00 PM
- Sunday hours
- 9:00 AM-6:00 PM
- Maximum fine
- $500 per day of violation
- Enforcing office
- City Administrator / Code Enforcement Officer
Summary
In the City of St. Peters, Missouri, construction and demolition work in residential zones may not create noise above 65 dBA at the nearest residential property line outside set hours. Permitted hours run 6:30 a.m. to 6 p.m. weekdays in June through August, 7 a.m. to 6 p.m. other weekdays, 8 a.m. to 6 p.m. Saturdays and 9 a.m. to 6 p.m. Sundays.
8. Construction or demolition related activity in any zoning district which results in a sound level created thereby in a residential zoning district in excess of 65 dbA (A-weighted sound pressure level), when the noise emitted is measured at the nearest residential property line to the property upon which the noise source is located, other than between the hours of: a. 6:30 A.M. to 6:00 P.M. on weekdays during the months of June, July and August; b. 7:00 A.M. to 6:00 P.M. on weekdays during the remaining months of the calendar year; c. 8:00 A.M. to 6:00 P.M. on Saturday; and d. 9:00 A.M. to 6:00 P.M. on Sunday;
Full Breakdown
Section 210.390(C)(8) of the St. Peters Municipal Code, part of the Board of Aldermen's 2019 rewrite of the noise ordinance (Ord. No. 7236, adopted December 19, 2019), lists construction and demolition noise above 65 dBA measured at the nearest residential property line as one of the acts declared to be loud, disturbing and unnecessary noises unless it falls inside the permitted window: 6:30 a.m. to 6:00 p.m. weekdays in June, July and August; 7:00 a.m. to 6:00 p.m. weekdays the rest of the year; 8:00 a.m. to 6:00 p.m.
Saturday; and 9:00 a.m. to 6:00 p.m. Sunday. The same subsection carves out an exception for urgent necessity or public safety and for repair, maintenance or construction of public facilities operated by the State, County or municipal governments, quasi-public corporations, or private utilities, so emergency utility crews are not locked to the daytime window. The Code Enforcement Officer, the City Administrator or a designated representative, weighs the factors listed in Subsection (D), including proximity to sleeping residential units between 10:30 p.m. and 7:00 a.m., zoning of the area and duration of the noise, when deciding whether a complaint amounts to a violation.
Because the 65 dBA threshold and the exact hours are measured objectively rather than left to complaint alone, a contractor running equipment at 6:00 a.m. on a Tuesday in April, ahead of the 7:00 a.m. weekday start for non-summer months, is out of compliance even without a decibel reading.
Violations & Fines
A resident who believes work runs outside the permitted hours or above 65 dBA can complain to the City Administrator, who issues a written notice citing the facts and section violated. The alleged violator gets a hearing at least seven days later and may file a written answer at City Hall two days beforehand. If corrective measures are inadequate, the case can go to the Police Department for a summons to St. Peters Municipal Court; conviction carries a fine up to $500, each day a separate offense.
Frequently Asked Questions
Can construction start before 7 a.m. on a weekday in St. Peters?
Is there an exception for emergency utility repairs?
What happens if a contractor keeps working past 6 p.m.?
Sources & Official References
Other rules in St. Peters
How St. Peters compares: Cities with the Strictest Construction Hours·Compare St. Peters to another location·View the Missouri noise ordinances overview
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