35 ILCS 200/10-45
Valuation during 8 year valuation period. In furtherance of the policy of encouraging the rehabilitation of historic residences, property certified pursuant to this Historic Residence Assessment Freeze Law shall be eligible for an assessment freeze, as provided in this Section, eliminating from consideration, for assessment purposes, the value added by the rehabilitation and limiting the total valuation to the base year valuation as defined in subsection (i) of Section 10-40. For all property upon which the Director has issued a certificate of rehabilitation, the valuation for purposes of assessment shall not exceed the base year valuation for the entire 8-year valuation period, unless a taxing district elects, under Section 10-85, that the provisions of this Section shall not apply to taxes that are levied by that taxing district. In the event that election is made, the property shall be valued under Section 9-145 or 9-150 for the purpose of extending taxes of that taxing district. The changes made to this Section by this amendatory Act of the 91st General Assembly are declarative of existing law and shall not be construed as a new enactment.
35 ILCS 200/10-45