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

Assessor - Parcel Sales

Metadata Updated: May 3, 2024

Update 10/31/2023: Sales are no longer filtered out of this data set based on deed type, sale price, or recency of sale for a given PIN with the same price. If users wish to recreate the former filtering schema they should set sale_filter_same_sale_within_365, sale_filter_less_than_10k, and sale_filter_deed_type to False.

Parcel sales for real property in Cook County, from 1999 to present. The Assessor's Office uses this data in its modeling to estimate the fair market value of unsold properties.

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.

Sale document numbers correspond to those of the Cook County Clerk, and can be used on the Clerk's website to find more information about each sale.

NOTE: These sales are filtered, but likely include non-arms-length transactions - sales less than $10,000 along with quit claims, executor deeds, beneficial interests are excluded. While the Data Department will upload what it has access to monthly, sales are reported on a lag, with many records not populating until months after their official recording date.

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.

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 License: No license information was provided.

Downloads & Resources


Metadata Created Date May 26, 2022
Metadata Updated Date May 3, 2024

Metadata Source

Harvested from cookcountyil json

Additional Metadata

Resource Type Dataset
Metadata Created Date May 26, 2022
Metadata Updated Date May 3, 2024
Data First Published 2023-11-14
Data Last Modified 2024-05-01
Category Property & Taxation
Public Access Level public
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id de54551a-9a98-42b6-9f79-5f1bd4676e39
Harvest Source Id d52781fd-51ef-4061-9cd2-535a0afb663b
Harvest Source Title cookcountyil json
Homepage URL
Source Datajson Identifier True
Source Hash cac3f501c06032f2c896b81d1b961f317b5a2b02a2e938c93537401e376ee07d
Source Schema Version 1.1

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