Cal. Health and Safety Code § 18870.4

(a) Except as otherwise provided in subdivision (b), the department by administrative rule and regulation shall establish a schedule of fees relating to all construction, mechanical, electrical, plumbing, and installation permits. The fees shall apply to and be paid to the enforcement agency. Fees established for construction, mechanical, electrical, and plumbing permits shall be reasonably consistent with the current edition of the Uniform Building Code as published by the International Conference of Building Officials, the Uniform Plumbing Code as published by the International Association of Plumbing and Mechanical Officials, and the National Electrical Code as published by the National Fire Protection Association. (b) Fees for construction, mechanical, electrical, plumbing, and installation permits in temporary recreational vehicle parks shall be determined by the enforcement agency for each project, based on the cost of administration and enforcement, including the cost of determining the amount of fees to be charged.