Cook County Tax Appeal

Is your Cook County property assessment too high? Give your 14-digit PIN or your address and get the Cook County Assessor's own current record for your home: assessed value (mailed, certified and Board of Review), the Assessor's market value, value history and the characteristics on file, such as square feet, year built and baths (a wrong one is itself a ground for appeal). Then get an appeal-ready table of comparable homes from the same assessment neighborhood and class, with similar size and age, that are assessed lower per square foot of building, ranked by similarity, with the neighborhood median and the value your home would have at the comps' median. You can also see recent arm's-length sales of similar homes with price per square foot, and whether the Assessor or Board of Review window for your township is open, with links to the official calendars. All data comes live from Cook County's official open data portal. Covers Chicago and suburban Cook County, class 2 houses and small apartment buildings. It shows public records, not legal advice, and does not promise a lower assessment; you file the appeal yourself.