Ohio Rev. Code § 519.17: Zoning certificate required.

No person shall locate, erect, construct, reconstruct, enlarge, or structurally alter any building or structure within the territory included in a zoning resolution without obtaining a zoning certificate, if required under section 519.16 of the Revised Code, and no such zoning certificate shall be issued unless the plans for the proposed building or structure fully comply with the zoning regulations then in effect.