Check out State ex rel. Sunset Estate Properties, LLC v. Village of Lodi, No. 2013-1856 (Mar. 10, 2015), a case in which the Ohio Supreme Court held that a local zoning ordinance was unconstitutional on its face.
The Village’s zoning code, adopted in 1987, banned manufactured home (trailer) parks. Of course, the ordinance could not ban those parks already in existence, which were allowed as nonconforming uses. Sunset Estates was one such park.
The ordinance also provided that if a nonconforming use was discontinued for six months, that was evidence of the owner’s intent to abandon the nonconforming use:
Whenever a nonconforming use has been discontinued for a period of six months or more, such discontinuance shall be considered conclusive evidence of an intention to legally abandon the nonconforming use. At the end of the six-month period of abandonment, the nonconforming use shall not be re-established, and any further

