735 ILCS 5/15-1200.7
A property shall not be considered abandoned residential property if: (i) there is an unoccupied building which is undergoing construction, renovation, or rehabilitation that is proceeding diligently to completion, and the building is in substantial compliance with all applicable ordinances, codes, regulations, and laws; (ii) there is a building occupied on a seasonal basis, but otherwise secure; (iii) there is a secure building on which there are bona fide rental or sale signs; (iv) there is a building that is secure, but is the subject of a probate action, action to quiet title, or other ownership dispute; or (v) there is a building that is otherwise secure and in substantial compliance with all applicable ordinances, codes, regulations, and laws.
735 ILCS 5/15-1200.7