All owners of buildings fronting upon any street or public thoroughfare are required to place in some conspicuous place and upon such buildings proper numbers in compliance with the provisions of this chapter; or in default of so doing, same shall be placed thereon under the supervision of the Mayor at the expense of the owner showing default, and the cost and expense thereof shall be assessed against the building whereon the same is placed and the real estate whereof said building is appurtenant.
(Ord. 93. Passed 12-10-56.)