Cook County of Illinois

Board of Review Appeal Decision History

Historic land, building, and total assessed values for all Cook County parcels appealed with the Board of Review, from 2010 to present. The Board of Review uses these values for reporting, evaluating assessment performance over time, and research.

Example records
NamebrandAlternate Namelegal entityCityaddressStateaddressZIP CodeaddressStreet AddressaddressPinregistrationTownship CodegeographicTax YeartemporalAppealtrkidentifierAppealseqidentifierTaxcodegeographic
909 Wisconsin Street CKOVITZ SHIFRIN NESBITMUNDELEINIL60060175 N. ARCHER AVENUE143241207110057420247414432574026
State Place CondominiuELLIOTT & ASSOCIATESCHICAGOIL606051101 S. STATE STREET171530803910357620247611707776098
JOSE M TORRESRAILA & ASSOCIATESCHICAGOIL606345635 W IRVING PARK RD132020300800007120247131306171073
Use cases

Commercial Property Underwriting Validation

A commercial real estate lender underwriting a loan on a Cook County property checks whether the collateral parcel has a history of successful assessment appeals, how large the valuation reductions were, and whether the current assessed value reflects post-appeal figures rather than the assessor's original estimate, which directly affects the tax burden baked into the borrower's operating expenses.

PinTax YearAssessor TotalvalueBor TotalvalueResult

Property Tax Appeal Attorney Market Sizing

A legal technology company building a sales pipeline for property tax appeal software identifies which law firms file the highest volume of appeals across Cook County townships, what their historical success rates are, and which geographic markets they concentrate in, to prioritize outreach to high-volume firms most likely to benefit from workflow automation.

Alternate NameTownship CodeResultTax YearAppealtype

Assessment Dispute Pattern Detection for Fraud Screening

A title insurance underwriter reviewing a commercial property transaction flags parcels where the same business entity has filed repeated appeals across multiple tax years with unusually large reductions relative to the assessor's original value, which may indicate aggressive valuation manipulation or misclassification of property use that could affect title risk.

NamePinTax YearAssessor TotalvalueBor Totalvalue
Related datasets
Cook County Assessor PermitsScavenger Tax SaleCook County of IllinoisBuilding Code ScofflawsCity of ChicagoChicago City ContractsCity of ChicagoCase-Related Civil LitigationCity of New YorkProperty Assessment ActionsBusiness Personal Property TaxCook County Address Points, Township 23Registered Business OwnersCity of ChicagoLicensee Excise Tax ReportedState of MissouriProcurement Intent to AwardCook County of IllinoisClaims Against the State of IowaState of IowaAffordable Rental Housing DevelopmentsCity of ChicagoChicago Building PermitsCity of ChicagoCampaign Contributions, Restricted ContractorsCook County of IllinoisMontgomery County SpendingMontgomery County of MarylandOrdinance ViolationsCity of ChicagoAdditional Dwelling Unit Preapproval ApplicationsCity of ChicagoContractor Business Diversity Program ReportsCity of ChicagoGrocery StoresCity of Chicago