Construction hours in Chino, CA — sometimes called construction noise rules or contractor work-hour ordinances — set when contractors can run power tools, hammers, and heavy equipment.
Construction noise in Chino is exempt from the exterior decibel limits in CMC § 9.40.040 only when the work occurs within designated construction hours. The City of Chino General Plan Noise Element (Objective N-1.3, Policy P2) limits construction work near noise-sensitive uses to 7:00 a.m. to 7:00 p.m., and CMC Chapter 9.40 carries that limit through as the exemption window.
Per the EIR for the City of Chino General Plan (Section 4.10, p. 4.10-11): 'noise or vibrations associated with construction or repair or grading are exempted provided the activities do not occur outside of designated hours for construction.' Noise Element Policy P2 under Objective N-1.3 'limits construction in the vicinity of noise-sensitive uses to the hours between 7:00 a.m. and 7:00 p.m., stipulates that noise-generating stationary sources be located away from sensitive receptors, and requires the use of exhaust mufflers and temporary noise barriers for construction equipment' (Chino GP EIR p. 4.10-28). Outside those hours, construction is subject to the standard CMC § 9.40.040 exterior noise standards (50 dBA L50 / 70 dBA Lmax at night), which heavy equipment will typically exceed. Permitted work governed by the California Building Code (Title 15 CMC adopts the 2022 CBC/CRC) also requires inspector coordination during normal business hours.
Construction outside 7 a.m.–7 p.m. that exceeds CMC § 9.40.040 limits is a public-nuisance infraction. Construction-related noise levels typically run 80–90 dBA at 50 feet (per General Plan EIR), well above the 70 dBA Lmax nighttime cap.
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Side-by-side rule comparisons with other cities in San Bernardino County.
See how other cities in San Bernardino County handle construction hours.
See how Chino's construction hours rules stack up against other locations.
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