Cal. Sts. & High. Code § 741

Prior to issuing a building permit the officer whose function is to issue such permits shall examine the precised plan and if he finds that the building or structure proposed to be erected will lie within the boundaries of the mapped highway he shall grant the permit if the cost of the proposed building or structure is five hundred dollars ($500) or less. Otherwise he shall refuse such permit and notify the applicant for the permit of the reason for such refusal.