San Ramon, CA Animal Ordinances: Breed Restrictions (2026)

Dangerous dog regulation in San Ramon operates under California's uniform state framework established by Food & Agricultural Code §31601-31683, administered locally by Contra Costa County Animal Services. California preempts all breed-specific legislation under §31683, meaning San Ramon cannot restrict or ban specific breeds regardless of reputation. Dangerous dog determinations are strictly behavior-based through a formal hearing process. A dog may be declared 'potentially dangerous' if it has: (1) engaged in unprovoked aggressive behavior requiring defensive action by a person on two separate occasions within 36 months off the owner's property, (2) killed, seriously bitten, or inflicted injury on a domestic animal off the owner's property on two separate occasions in 36 months, or (3) bitten a person once without severe injury. A 'vicious dog' designation applies when a dog has severely injured or killed a person, or is a potentially dangerous dog that continues aggressive behavior. Hearings are conducted by Contra Costa County Animal Services with written notice to the owner and opportunity to present evidence. Consequences of a potentially dangerous determination include: registration with Animal Services, proper enclosure requirements (6-foot fence, secured gate, posted warning signs), muzzle and secure leash when off property, and potential liability insurance requirement ($100,000-$300,000 typical). Vicious dog determinations may result in mandatory euthanasia if the behavior cannot be safely mitigated, or permanent removal from the jurisdiction. San Ramon's Sheriff deputies respond to active bite incidents and coordinate with Animal Services for quarantine (10 days for vaccinated dogs, typically at owner's home). Under California Civil Code §3342, dog owners are strictly liable for bites in public places or when the bitten person is lawfully on private property, regardless of prior dangerous behavior.