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.
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