Cal. Gov. Code § 50485.7

All airport zoning regulations adopted under this article shall be reasonable and none shall impose any requirement or restriction which is not reasonably necessary to effectuate the purposes of this article. In determining what regulations it may adopt, each city or county shall consider, among other things, the character of the flying operations expected to be conducted at the airport, the nature of the terrain within the airport hazard area, the character of the neighborhood, and the uses to which the property to be zoned is put and adaptable.