California Code, Vehicle Code - VEH § 5052

Except as otherwise provided by local ordinance, a collector may maintain one or more vehicles described in Section 5051, whether currently licensed or unlicensed, or whether operable or inoperable, in outdoor storage on private property, if every such vehicle and outdoor storage area is maintained in such manner as not to constitute a health hazard and is located away from public view, or screened from ordinary public view, by means of a suitable fence, trees, shrubbery, opaque covering, or other appropriate means.