St. Louis's Noise Ordinances: The Rules That Matter

Every city handles noise ordinances a little differently. In St. Louis, Missouri, there are 8 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Construction Hours

Construction noise in St. Louis is generally permitted 7 AM to 7 PM Monday through Saturday, with Sunday and holiday work requiring special permission. SLRC 15.42 prohibits construction impact noise outside these hours in residential zones.

Key details: Weekday Hours: 7 AM - 7 PM Mon-Sat. Sunday: Permit required. Code: SLRC 15.42.050. Permit Office: Building Division, 1200 Market. Fine: $200/day.

Stop-work order plus $200 per day fine. Repeat violators may have building permit privileges suspended.

Vehicle Noise

Vehicle noise in St. Louis is regulated under SLRC Chapter 17 and state RSMo 307.170. Modified exhaust, loud stereos, and engine revving are prohibited. SLMPD Traffic Division actively enforces on Kingshighway, Gravois, and downtown.

Key details: Muffler: Required - RSMo 307.170. Code: SLRC 17.70. Stereo: 50 ft audibility limit. Fine: $100-$500. Impound: Possible for takeovers.

$100 first offense, up to $500 for repeat. Vehicle impoundment possible for modified exhaust or street-takeover participation.

Industrial Noise

Commercial noise from loading docks, HVAC, refrigeration, and delivery operations in St. Louis is regulated under SLRC 15.42.070. Mixed-use zones near the Central West End and downtown have stricter decibel caps at the residential property line.

Key details: Daytime Limit: 60 dBA at property line. Nighttime Limit: 55 dBA. Code: SLRC 15.42.070. Enforcement: Building Division. Fine: $500-$1,000.

30-day abatement notice first. $500-$1,000 fine on non-compliance. Business license review for repeat offenders.

Leaf Blower Rules

St. Louis does not have a leaf-blower-specific ordinance. Gas and electric blowers are allowed during general construction hours of 7 AM to 7 PM under SLRC 15.42, but must not exceed plainly-audible thresholds at night.

Key details: Ban: None citywide. Allowed Hours: 7 AM - 7 PM. Code: SLRC 15.42. Electric vs Gas: Both allowed.

Enforced only as a general noise violation if operating outside 7 AM-7 PM window. Typical fine $100.

St. Louis is more permissive than most cities when it comes to leaf blower rules. That said, there are still limits.

Aircraft Noise

Aircraft noise from St. Louis Lambert International Airport (STL) is preempted by the FAA under 49 USC 40103. The Lambert Noise Abatement Program mitigates impacts in affected neighborhoods including Bridgeton, Berkeley, and parts of North City.

Key details: Authority: FAA preempted. Airport: Lambert STL. Noise Office: 314-426-8040. Program: Part 150 Sound Insulation. Federal Law: 49 USC 40103.

City cannot issue violations for aircraft noise. FAA investigates pattern violations of published procedures.

The rules around aircraft noise in St. Louis lean permissive, but that does not mean anything goes.

Barking Dogs

Habitual barking is prohibited under SLRC Chapter 10 (Animal Care and Control) and Chapter 15.42 noise rules. A dog that barks continuously for 15 minutes or intermittently for 30 minutes can trigger a citation from Animal Care and Control.

Key details: Threshold: 15 min continuous / 30 intermittent. Code: SLRC 10.04.030. Agency: Animal Care and Control. Phone: 314-657-1500. Fine: $100-$500.

Warning letter first; $100-$500 fine on second citation. Chronic nuisance can lead to dog being declared a public nuisance and removal.

Quiet Hours

St. Louis enforces nighttime quiet hours from 10 PM to 7 AM under the St. Louis Revised Code (SLRC) Chapter 15.42. Sound that is plainly audible beyond 50 feet of a dwelling during those hours is presumptively unreasonable and can trigger a citation from the Citizens Service Bureau or SLMPD.

Key details: Quiet Hours: 10 PM - 7 AM weekdays. Weekend: 11 PM - 8 AM. Code: SLRC Chapter 15.42. State Law: RSMo 574.010. Reporting: Dial 311 or CSB 314-622-4800.

First offense typically $100-$200. Repeat violations within 12 months escalate to $500. RSMo 574.010 peace disturbance charges possible for aggravated incidents.

Amplified Music & Events

Amplified music in St. Louis is regulated under SLRC 15.42 and the Outdoor Entertainment Permit rules. Sound plainly audible at 50 feet after 10 PM is prohibited; outdoor venues in The Grove, Soulard, and Washington Avenue require sound permits.

Key details: Cutoff: 10 PM Sun-Thu, 11 PM Fri-Sat. Distance: 50 ft audibility. Venues: Outdoor Entertainment Permit. Agency: Excise Division / SLMPD. Fine: $100-$500.

Venue: $500 per incident plus risk to liquor license. Residential host: $100-$500, chronic nuisance designation possible.

The Bottom Line

Compared to many U.S. cities, St. Louis gives residents more room on noise ordinances. 2 of the 8 rules here are rated permissive. But permissive does not mean unregulated. There are still requirements, and the city does enforce them when violations are reported.

All of the above reflects St. Louis's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.