California Civil Code §3482.5 protects established agricultural operations from nuisance suits after three years of consistent activity. SCC layers this with the Williamson Act and agricultural preserves in Coyote Valley and the Gilroy-Morgan Hill area.
California Civil Code §3482.5 provides that an agricultural activity in operation for more than three years and consistent with proper customs is not a nuisance because of changed surrounding conditions. Once a residential neighbor moves near an established farm, ranch, apiary, or processing operation, they cannot sue to shut it down for ordinary noise, dust, or odor. Santa Clara County reinforces this with strong Williamson Act enrollment and designated agricultural preserves: Coyote Valley north of Morgan Hill, the San Martin / Gilroy growing region, and South County hillsides. The county's General Plan Agricultural Resources Element commits to preserving prime farmland from urban encroachment.
No fines apply to farms protected by Civil Code §3482.5. A neighbor who sues a protected farm and loses may owe defense costs under anti-SLAPP rules. Operations exceeding proper customs forfeit the shield and face standard nuisance liability.
See how Sunnyvale's farm nuisance protection rules stack up against other locations.
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