Construction hours in Mendocino County, CA — sometimes called construction noise rules or contractor work-hour ordinances — set when contractors can run power tools, hammers, and heavy equipment.
Mendocino County's new Chapter 8.100 noise ordinance (adopted April 2026) focuses on nighttime quiet hours of 10:00 p.m. to 7:00 a.m. and does not set out a separate, detailed construction-hours schedule in published reporting. Reported coverage does not confirm specific permitted construction times for the unincorporated county.
Many California county noise ordinances exempt or separately regulate daytime construction, but the available, verified reporting on Mendocino County's newly adopted Chapter 8.100 (Ordinance 4558, April 7, 2026) describes general nighttime decibel limits and a 10:00 p.m. to 7:00 a.m. quiet period rather than a specific construction-hours table. We have not seen a fetched source confirming exact permitted construction start and stop times for unincorporated Mendocino County, so we do not assert one here. As a practical matter, construction noise during the 10:00 p.m. to 7:00 a.m. quiet hours would be subject to the general nighttime limits in Chapter 8.100, while daytime construction is generally less restricted. Property owners planning construction in unincorporated areas should confirm current requirements directly with Mendocino County Planning & Building Services and review the full text of Chapter 8.100 on the county's Municode code portal before relying on any specific schedule.
General Chapter 8.100 enforcement by the Sheriff's Office applies to nighttime construction noise: warning first, then infraction on a repeat response, with possible public-nuisance designation after repeated citations.
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