Sonoma County, CA Noise Ordinances: Construction Hours (2026)
Construction hours in Sonoma County, CA, sometimes called construction noise rules or contractor work-hour ordinances, set when contractors can run power tools, hammers, and heavy equipment.
Key Facts
- Countywide construction-hours ordinance
- None adopted
- How hours are usually set
- Project conditions of approval (Permit Sonoma)
- Daytime reference period
- 7 a.m. to 10 p.m.
- Nighttime disturbance enforcement
- Sheriff under CA Penal Code 415
- Check before building
- Permit Sonoma / your permit conditions
Summary
The County Code contains no countywide ordinance fixing construction start and stop times for unincorporated Sonoma County. Construction noise is generally addressed through project-specific conditions, the General Plan Noise Element standards, and Penal Code disturbing-the-peace law rather than a blanket hours rule.
Noise Element (Oct. 23, 2012). The County General Plan Noise Element addresses construction noise as a separate category from numeric exterior standards; construction-noise standards may be incorporated as conditions in building, grading, or use permits issued by Permit Sonoma, particularly where new construction is located near noise-sensitive uses.
Full Breakdown
on weekdays) for the unincorporated area. construction activities,' but County Counsel had not drafted such an ordinance as of a 2018 review. As a result, there is no single countywide construction curfew that applies uniformly to every property. In practice, construction noise is managed in two main ways. ) framework and the Table NE-2 performance standards. Second, construction noise that becomes a loud and unreasonable disturbance, particularly at night, can be addressed by the Sheriff under California Penal Code section 415. Because rules can be attached to a specific permit, owners and contractors should check the conditions of approval for their parcel and contact Permit Sonoma before assuming any hours are allowed.
Violations & Fines
There is no countywide fixed-fine schedule for construction hours. Violations of project-specific conditions of approval are enforced by Permit Sonoma through code enforcement and permit action. Loud nighttime construction noise can also be cited by the Sheriff under Penal Code 415 (up to 90 days jail, up to $400 fine, or both).
Frequently Asked Questions
What hours can contractors work in unincorporated Sonoma County?
Can I be fined for early-morning construction noise?
Sources & Official References
Other rules in Sonoma County
How Sonoma County compares: Cities with the Strictest Construction Hours·California rules heatmap·Compare Sonoma County to another location·View the California noise ordinances overview
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