Ohio Revised Code Title XV. Conservation of Natural Resources § 1545.19

In case of any development or improvement, the assessments authorized by section 1545.18 of the Revised Code shall not in the aggregate exceed the cost of a development or improvement sufficient only to serve that need of the property to be assessed, unless the development or improvement has been petitioned for by the owners of not less than sixty per cent, both in foot frontage and in tax valuation, of the property to be assessed, consenting to a larger assessment than provided for in this section and section 1545.18 of the Revised Code, in which event such larger assessment may be levied to the extent specified in such petition.

Any owner of property to be assessed in accordance with section 1545.18 of the Revised Code may appeal to the probate court in the county in which such property is located from the action of the board of park commissioners in the matter of the determination of the aggregate amount to be assessed for any given development or improvement or in the matter of the determination of the assessment against any specific property, or both, in the manner provided in sections 6117.01 to 6117.40, inclusive, of the Revised Code, and the court may review and modify the action of the board with respect to such assessments.