No person shall erect, construct, place or maintain any building, structure, fence, wall, porch, step, post, pole, pipe, conduit, sign, blockade, seat, bench, table, merchandise or other physical encroachment or obstruction in, over or upon any street, alley and public ways which have been dedicated or are open to public use and the curbing, sidewalk and parkway, if any, adjacent thereto without first obtaining and maintaining a permit therefor.
(`83 Code, § 12.48.010) (Ord. 89-6 § 1 (part), 1989)