605 ILCS 5/5-917

Any person paying an impact fee shall have the right to contest the land use assumptions, the development and implementation of the comprehensive road improvement plan, the imposition of impact fees, the periodic updating of the road improvement plan, the refund of impact fees and all other matters relating to impact fees. The initial appeal shall be made to the legislative body of the unit of local government in accordance with the procedures adopted in the ordinance or resolution. Any subsequent relief shall be sought in a de novo proceeding in the appropriate circuit court.