Noise Ordinances in Yellowstone County, MT (2026)
2 county-level rules, plus city-specific rules for 1 city in Yellowstone County, Montana.
Verified from official government sources
Amplified Music & Outdoor Sound
Outdoor and rooftop seating at eating and drinking establishments in unincorporated Yellowstone County may use amplified sound or live music only in conformity with the County's noise standards. Section 27-1009.P.1(c) bars any waiver of those standards within 50 feet of a residential zoning district.
Amplified Sound Rules for Outdoor Dining in Yellowstone County
Some RestrictionsYellowstone County Zoning Code § 27-1009.P.1(c)
(c) The use of mechanically produced sound, amplified sound, or live music shall only be permitted in conformity with the County's noise standards. Waivers or variances to the County's noise standards are not allowed for property within 50 feet of any residential zone.
Decibel Limits
In unincorporated Yellowstone County, mechanical equipment on industrial property within 50 feet of a residential zoning district, including air conditioners, air handlers, and back-up generators, cannot generate noise above 55 decibels measured 3 feet from the unit without sound abatement. The Yellowstone County Zoning Code sets this limit in Section 27-602.F.3, alongside a screening requirement for the same equipment.
Mechanical Noise Limit in Yellowstone County
Some RestrictionsYellowstone County Zoning Code, § 27-602.F.3
3. Mechanical equipment, including but not limited to air conditioning units, air handling units, back-up power generators, installed at ground level or on a roof must be fully screened from view. The screening shall be at least the height of the mechanical equipment. Mechanical equipment that generates or expected to generate noise in excess of 55 decibels within three feet of the equipment lo...
Noise Ordinances by City in Yellowstone County
1 cities in Yellowstone County have their own noise ordinances rules. Each link goes to that city's dedicated page with code citations.
All Yellowstone County ordinances
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