California Code, Health and Safety Code - HSC § 114286

(a) No sleeping accommodations shall be maintained or kept in any room where food is prepared, stored, or sold.

(b) Living or sleeping quarters located on the premises of a food facility shall be separated from rooms and areas used for food facility operations by complete partitioning. Except for restricted food service facilities, no door or other opening shall be permitted in the partition that separates the food facility from the living or sleeping quarters.