Construction hours in Yellowstone County, MT — sometimes called construction noise rules or contractor work-hour ordinances — set when contractors can run power tools, hammers, and heavy equipment.
Yellowstone County sets no county-wide construction-hours noise rule. In Billings, noise from home or building repair, construction, or grounds maintenance is fully exempt from decibel limits between 7:00 a.m. and 8:00 p.m. Outside that window, construction must meet standard limits or obtain a waiver.
Under Billings City Code Sec. 17-104(5), noise caused by home or building repair, construction, or grounds maintenance is exempt from the noise-level limits, but only between 7:00 a.m. and 8:00 p.m. Sec. 17-103(b) confirms noises from construction and grounds maintenance are 'excluded as provided in section 17-104.' To work before 7:00 a.m. or after 8:00 p.m., a contractor must obtain a waiver from the city administrator (Sec. 17-106). Unincorporated Yellowstone County does not impose its own construction-hours noise ordinance; rural work is governed by the general state disturbing-the-peace and any applicable zoning conditions.
Construction outside the exempt hours without a waiver is a misdemeanor under Sec. 1-110; each day is a separate offense and the activity may be enjoined as a public nuisance.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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