California Code, Penal Code - PEN § 33880

(a) A city, county, or city and county, or a state agency may adopt a regulation, ordinance, or resolution imposing a charge equal to its administrative costs relating to the seizure, impounding, storage, or release of any firearm, ammunition feeding device, or ammunition.

(b) The fee under subdivision (a) shall not exceed the actual costs incurred for the expenses directly related to taking possession of any firearm, ammunition feeding device, or ammunition, storing it, and surrendering possession of it to a licensed firearms dealer or to the owner.

(c) The administrative costs described in subdivisions (a) and (b) may be waived by the local or state agency upon verifiable proof that the firearm, ammunition feeding device, or ammunition was reported stolen at the time it came into the custody or control of the law enforcement agency.

(d) The following apply to any charges imposed for administrative costs pursuant to this section:

(e) Costs for a hearing or appeal related to the release of any firearm, ammunition feeding device, or ammunition shall not be charged to the legal owner who redeems the property, unless the legal owner voluntarily requests the poststorage hearing or appeal.  A city, county, city and county, or state agency shall not require a legal owner to request a poststorage hearing as a requirement for release of the firearm, ammunition feeding device, or ammunition to the legal owner.

(f) This section shall become operative on July 1, 2020.