Cal. HSC § 1566.2

A residential facility, which serves six or fewer persons shall not be subject to any business taxes, local registration fees, use permit fees, or other fees to which other family dwellings of the same type in the same zone are not likewise subject. Nothing in this section shall be construed to forbid the imposition of local property taxes, fees for water service and garbage collection, fees for inspections not prohibited by Section 1566.3, local bond assessments, and other fees, charges, and assessments to which other family dwellings of the same type in the same zone are likewise subject. Neither the State Fire Marshal nor any local public entity shall charge any fee for enforcing fire inspection regulations pursuant to state law or regulation or local ordinance, with respect to residential facilities that serve six or fewer persons, except for fees authorized pursuant to Section 13235.

For purposes of this section, “family dwellings,” includes, but is not limited to, single-family dwellings, units in multifamily dwellings, including units in duplexes and units in apartment dwellings, mobilehomes, including mobilehomes located in mobilehome parks, units in cooperatives, units in condominiums, units in townhouses, and units in planned unit developments.