Simi Valley, CA Animal Ordinances: Mandatory Spay/Neuter (2026)

101, but Article 2 of Chapter 1 carves out specific county sections the City chooses not to enforce. 201, titled Deletion: Section 4421, Spay/neuter requirements, states that Section 4421 of the Ventura County Code is found inapplicable to Simi Valley and is deleted from the chapter in its entirety. That deletion was made deliberate policy by Ordinance No. 1337, effective July 1, 2022, when the City Council repealed and reenacted the animal chapter. 202 keeps a breeding permit mandate for anyone who breeds a dog or cat owned or kept in the City, issued annually by the Director.

So Simi Valley regulates breeding activity through a permit system, addressed on its own published page, but does not require spaying or neutering as a precondition of pet ownership. Owners should not assume the absence of a mandate means no state-level cost incentive exists: California's differential licensing structure, administered through the county's animal licensing program that Simi Valley also adopts by reference, still charges a higher license fee for an unaltered dog than for a sterilized one, even though the City removed the outright sterilization requirement itself.