Every vehicle in unincorporated Jefferson County must have a working, unmodified muffler. On roads posted 35 mph or less, most vehicles may not exceed 80 dB(A) (measured 50 feet from the lane center); cutoffs and bypasses are prohibited.
The Noise Abatement Policy requires a muffler in constant operation and bars cutoff, bypass, or similar modifications. On-road limits scale with vehicle type and speed: 80 dB(A) for most vehicles and post-1972 motorcycles at 35 mph or less (84 dB(A) above 35 mph), and 86-88 dB(A) for heavy vehicles over 10,000 lbs. Vehicles on private property may not exceed 78 dB(A). Colorado state law (CRS 42-4-225) independently makes a defective or modified muffler a traffic infraction.
County noise violation is a Class 2 Petty Offense ($30-$300). A modified or missing muffler is also a Class B traffic infraction under state CRS 42-4-225.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Lakewood, CO
Lakewood restricts RV and boat parking in residential areas. Recreational vehicles and boats must be stored on the owner's property, not on public streets fo...
Lakewood, CO
Lakewood restricts commercial vehicle parking in residential areas. Heavy commercial vehicles cannot be stored overnight in residential zones.
Lakewood, CO
Lakewood requires driveways to meet city standards. A permit is needed for new or modified driveways. Vehicles must not block sidewalks.
Lakewood, CO
Lakewood regulates street parking with time limits and restrictions. Vehicles may not be parked in the same location for more than 72 hours on public streets.
Lakewood, CO
Lakewood follows Colorado property line rules. Fences must be on the owner's property. Shared fences require neighbor agreement.
Lakewood, CO
Lakewood limits residential fence heights to 4 feet in front yards and 6 feet in side and rear yards under the Zoning Ordinance.
See how Lakewood's vehicle noise rules stack up against other locations.
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