(35 ILCS 200/10-20)
    Sec. 10-20. Repairs and maintenance of residential property. Maintenance and repairs to residential property owned and used exclusively for a residential purpose shall not increase the assessed valuation of the property. For purposes of this Section, work shall be deemed repair and maintenance when it (1) does not increase the square footage of improvements and does not materially alter the existing character and condition of the structure but is limited to work performed to prolong the life of the existing improvements or to keep the existing improvements in a well maintained condition; and (2) employs materials, such as those used for roofing or siding, whose value is not greater than the replacement value of the materials being replaced. Maintenance and repairs, as those terms are used in this Section, to property that enhance the overall exterior and interior appearance and quality of a residence by restoring it from a state of disrepair to a standard state of repair do not "materially alter the existing character and condition" of the residence.
(Source: P.A. 90-788, eff. 8-14-98.)