Construction hours in Placer County, CA — sometimes called construction noise rules or contractor work-hour ordinances — set when contractors can run power tools, hammers, and heavy equipment.
Placer County Code 9.36.030 exempts construction, alteration and repair activities from the noise standards only between 6:00 a.m. and 8:00 p.m. Monday-Friday, and 8:00 a.m. to 8:00 p.m. Saturday and Sunday, provided equipment has factory muffling and is well maintained.
In unincorporated Placer County, construction noise is addressed through the exemptions in Placer County Code Section 9.36.030(A)(7). Construction, alteration or repair activities are exempt from the general noise standards only when they take place between 6:00 a.m. and 8:00 p.m. Monday through Friday, and between 8:00 a.m. and 8:00 p.m. on Saturday and Sunday, and only if all construction equipment is fitted with factory-installed muffling devices and maintained in good working order. Work outside those windows is not exempt and must meet the Table 1 sound limits in 9.36.060. A contractor needing to work outside these hours may request an exception under 9.36.080, which the approving authority weighs against factors including sensitive receptors, duration, and time of day; notice must be given to affected surrounding properties. (Note: a 2025 county code amendment package proposed clarifying the construction-exception process; verify current text before relying on it.)
Construction noise outside the exempt hours is an infraction under 9.36.090. Administrative fines under 9.36.110 are $100/$200/$500 for first/second/third citations, with each day a separate offense. The Placer County Sheriff and Planning Director are designated enforcement officers (9.36.020).
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