IL HB1377

Requires appraisals submitted by owner-occupants of single-family residences to support property tax assessment challenges be prepared for ad valorem purposes, estimate value as of January 1 of the assessment year, and comply with chief county assessment officer or board of review rules

Mandates county reimbursement to property owners for appraisal costs when the chief county assessment officer or board of review lowers the assessed valuation based on the submitted appraisal

Appraisals must be prepared by an Illinois Certified Real Estate Appraiser in conformance with the Uniform Standards of Professional Appraisal Practice

Provisions take effect beginning with the 2026 assessment year

Applies specifically to counties with 3,000,000 or more inhabitants (Cook County) for certain provisions, while other provisions apply to all Illinois counties