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This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

Assessor - Parcel Universe

Metadata Updated: January 10, 2025

A complete, historic universe of Cook County parcels with attached geographic, governmental, and spatial data.

When working with Parcel Index Numbers (PINs) make sure to zero-pad them to 14 digits. Some datasets may lose leading zeros for PINs when downloaded.

Additional notes:Non-taxing district data is attached via spatial join (st_contains) to each parcel's centroid. Tax district data (school district, park district, municipality, etc.) are attached by a parcel's assigned tax code. Centroids are based on Cook County parcel shapefiles. Older properties may be missing coordinates and thus also missing attached spatial data (usually they are missing a parcel boundary in the shapefile). Newer properties may be missing a mailing or property address, as they need to be assigned one by the postal service. This dataset contains data for the current tax year, which may not yet be complete or final. Assessed values for any given year are subject to change until review and certification of values by the Cook County Board of Review, though there are a few rare circumstances where values may change for the current or past years after that. Rowcount for a given year is final once the Assessor has certified the assessment roll all townships. Data will be updated monthly. Depending on the time of year, some third-party and internal data will be missing for the most recent year. Assessments mailed this year represent values from last year, so this isn't an issue. By the time the Data Department models values for this year, those data will have populated. Current property class codes, their levels of assessment, and descriptions can be found on the Assessor's website. Note that class codes details can change across time. Due to discrepancies between the systems used by the Assessor and Clerk's offices, tax_district_code is not currently up-to-date in this table. For more information on the sourcing of attached data and the preparation of this dataset, see the Assessor's Standard Operating Procedures for Open Data on GitHub.

Read about the Assessor's 2023 Open Data Refresh.

Access & Use Information

Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: No license information was provided.

Downloads & Resources

Dates

Metadata Created Date June 4, 2023
Metadata Updated Date January 10, 2025

Metadata Source

Harvested from cookcountyil json

Additional Metadata

Resource Type Dataset
Metadata Created Date June 4, 2023
Metadata Updated Date January 10, 2025
Publisher datacatalog.cookcountyil.gov
Maintainer
Identifier https://datacatalog.cookcountyil.gov/api/views/nj4t-kc8j
Data First Published 2024-12-27
Data Last Modified 2025-01-09
Category Property & Taxation
Public Access Level public
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://datacatalog.cookcountyil.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 33b68773-2520-4d58-987c-04804a611d68
Harvest Source Id d52781fd-51ef-4061-9cd2-535a0afb663b
Harvest Source Title cookcountyil json
Homepage URL https://datacatalog.cookcountyil.gov/d/nj4t-kc8j
Source Datajson Identifier True
Source Hash 60def6dc81eaa5803299a83fd7b917fd7ef8d057a33a3895f9bcdebb65bb2056
Source Schema Version 1.1

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