Construction hours in Solano County, CA — sometimes called construction noise rules or contractor work-hour ordinances — set when contractors can run power tools, hammers, and heavy equipment.
Unincorporated Solano County has no dedicated construction-hours ordinance. Construction noise is governed indirectly by Solano County Code Sec. 21-10, which makes any non-agricultural noise exceeding 65 dBA at the property line after 10:00 p.m. or before 6:00 a.m. a per se disturbance of the peace. In practice this confines noisy construction to roughly 6:00 a.m. to 10:00 p.m.
Solano County Code Chapter 21 (Public Offenses) contains no separate construction-hours section. The county relies on the general nighttime noise rule in Sec. 21-10, which makes it unlawful to maliciously and willfully disturb the peace by loud or unusual noise and expressly includes any non-agricultural noise exceeding 65 dBA at the property line after 10:00 p.m. or before 6:00 a.m. (Ord. No. 1830). Because construction is non-agricultural activity, work that exceeds 65 dBA at a neighbor's property line during the overnight window is enforceable as a disturbance of the peace. The county's Building & Safety Services issues construction permits without separate time-of-day conditions in the code itself, but a project that violates Sec. 21-10 can be cited. Cal/OSHA workplace noise rules (Title 8 CCR Sec. 5096 et seq.) protect workers on the jobsite but do not set neighbor-facing limits. Cities within Solano County (Vallejo, Fairfield, Vacaville, Suisun City, Benicia, Dixon, Rio Vista) set their own dedicated construction-hours limits.
Construction noise that violates Sec. 21-10 (for example, framing or grading before 6:00 a.m. or after 10:00 p.m. above 65 dBA at the property line) is a misdemeanor disturbance of the peace, punishable under Sec. 1-21 by up to six months jail and/or a $1,000 fine, with each day a separate offense. The Sheriff or Resource Management Code Compliance can cite and pursue abatement under Chapter 10.
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