Cook County of Illinois

Cook County Assessor Permits

Historical permit data submitted by municipalities to the Cook County Assessor's Office. Each record details permit types, issue dates, status, and associated Parcel Index Numbers (PINs).

Example records
PinidentifierMunicipalitygeographicAddressaddressPermit TypeclassificationPermit AmountfinancialIssue DatetemporalEstimated Completion Datetemporal
17322070290000Chicago2301 W 47TH STNew Construction2850002018-06-122019-03-01
10251010120000Evanston1428 MAPLE AVEAddition/Alteration425002021-09-152022-01-30
28203020040000Oak Park611 S RIDGELAND AVERenovation180002023-03-222023-07-01
Use cases

Property Valuation Verification for Commercial Lending

A commercial real estate lender reviewing a loan application cross-checks recent permit activity on the subject parcel to confirm that declared improvements align with the borrower's stated property value and renovation scope.

PinPermit TypePermit AmountIssue DateAddress

Contractor Fraud Detection in Insurance Claims

A property insurer investigating a large repair claim checks whether a permit was actually pulled for the work, whether the declared permit amount matches the claim amount, and whether the timeline is consistent with the reported loss date.

AddressPermit TypePermit AmountIssue DateEstimated Completion Date

New Construction Pipeline Prospecting for Building Materials Sales

A regional sales team at a building materials distributor identifies addresses with recently issued new construction permits to prioritize outreach to contractors and developers who are actively in the build phase.

MunicipalityAddressPermit TypeIssue DateEstimated Completion Date
Related datasets
Chicago Building PermitsCity of ChicagoBoard of Review Appeal Decision HistoryCook County of IllinoisCook County Address Points, Township 23Scavenger Tax SaleCook County of IllinoisProcurement Intent to AwardCook County of IllinoisRental PermitsCity of BloomingtonDOB Permit IssuanceCity of New YorkCity of Clarkston Building PermitsState of WashingtonBuilding Code ScofflawsCity of ChicagoCity of Albany Building Permits IssuedState of New YorkRegistered Business OwnersCity of ChicagoCook County Cemetery PointsCook County of IllinoisPublic Health Clinic LocationsCity of ChicagoAffordable Rental Housing DevelopmentsCity of ChicagoCommunity Service CentersCity of ChicagoAdditional Dwelling Unit Preapproval ApplicationsCity of ChicagoDebarred Firms and IndividualsCity of ChicagoDOB NOW: Electrical Permit ApplicationsCity of New YorkSpecial Exception Permits (Department of Permitting Services)Montgomery County of MarylandCary NC Building Permit ApplicationsTown of Cary, North Carolina