Sonoma County, CA Right to Farm: Farm Nuisance Protection (2026)
Key Facts
- Governing section
- Sonoma County Code § 30-25
- Protected land
- Zoned land intensive/extensive/diverse agriculture
- Key exclusion
- Negligent or improperly managed operations excluded
- Disclosure required
- Annual tax bill notice to owners
- Scope
- Unincorporated county only, not incorporated cities
Summary
Properly conducted agricultural operations on designated agricultural land in unincorporated Sonoma County cannot be ruled a nuisance under county code if the operation wasn't a nuisance when it started and follows all applicable laws.
No agricultural operation conducted or maintained on agricultural land in a manner consistent with proper and accepted customs and standards, as established and followed by similar agricultural operations in the county, shall be or become a nuisance for purposes of this code or county regulations if it was not a nuisance when it began, provided that such operation complies with the requirements of all applicable federal, state, and county statutes, ordinances, rules, regulations, approvals and permits. The provisions of this section shall not apply where a nuisance results from the negligent or improper management or operation of an agricultural operation.
(Ord. No. 5203 § 5, 1999.)
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 64 Update 2).
Full Breakdown
Sonoma County Code § 30-25 shields agricultural operations on land zoned land intensive agriculture, land extensive agriculture, or diverse agriculture from nuisance liability if the operation follows proper and accepted customs and standards, complies with all federal, state, and county law, and wasn't already a nuisance when it began. The protection doesn't cover negligent or improperly managed operations. The county backs it with mandatory disclosure: an annual notice on property tax bills, a recorded declaration for development approvals near farmland, and a real estate transfer disclosure statement under § 30-28. This applies only in the unincorporated county. Santa Rosa, Petaluma, Rohnert Park, Windsor, Healdsburg, Sebastopol, Cotati, Cloverdale, and the City of Sonoma each set their own rules.
Violations & Fines
Negligent or improperly managed operations lose the nuisance defense; neighbors can pursue standard nuisance claims through civil court, and the county's protection doesn't override state health, safety, or water-quality law violations.
Frequently Asked Questions
Does Sonoma County's right-to-farm law stop all nuisance lawsuits against farms?
Does this ordinance apply inside the City of Sonoma or Santa Rosa?
Sources & Official References
Other rules in Sonoma County
California rules heatmap·Compare Sonoma County to another location·View the California right to farm overview
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