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Assessor - Parcel Sales Trending
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...
Search relevance: 1.00 | Views last month: 115 | Catalog Last Checked: November 03, 2026 at 11:23 PM -
Situs and mailing addresses of Cook County parcels. Used by the Assessor's office to mail assessment notices. This dataset was updated in March 2026 to include both owner and taxpayer...
Search relevance: 1.00 | Views last month: 90 | Catalog Last Checked: November 03, 2026 at 11:22 PM -
A complete, longitudinal universe of Cook County parcels with attached geographic, governmental, and spatial data starting in 1999. This dataset is useful for analysis of data from previous tax...
Search relevance: 1.00 | Views last month: 73 | Catalog Last Checked: November 03, 2026 at 11:23 PM -
Land, building, and total assessed values for all Cook County parcels, from 1999 to present. The Assessor's Office uses these values for reporting, evaluating assessment performance over time, and...
Search relevance: 1.00 | Views last month: 64 | Catalog Last Checked: November 03, 2026 at 11:23 PM -
A universe of current Cook County parcels with attached geographic, governmental, and spatial data. This dataset contains the current universe of parcels in Cook County. For analyses of prior tax...
Search relevance: 1.00 | Views last month: 62 | Catalog Last Checked: November 03, 2026 at 11:23 PM -
Residential single- and multi-family (fewer than 7 units) property characteristics collected and maintained by the Assessor's Office for all of Cook County, from 1999 to present. The office uses...
Search relevance: 1.00 | Views last month: 60 | Catalog Last Checked: November 03, 2026 at 11:23 PM -
Historical permit data submitted by municipalities and township assessors to the Cook County Assessor's Office. When working with Parcel Index Numbers (PINs) make sure to zero-pad them to 14...
Search relevance: 1.00 | Views last month: 57 | Catalog Last Checked: November 03, 2026 at 11:22 PM -
Residential condominium unit characteristics collected and maintained by the Assessor's office for all of Cook County, from 1999 to present. The office uses this data primarily for valuation,...
Search relevance: 1.00 | Views last month: 54 | Catalog Last Checked: November 03, 2026 at 11:22 PM -
Parcels with property tax-exempt status across all of Cook County per tax year, from Tax Year 2022 on, with geographic coordinates and addresses. Properties of religious, charitable, and...
Search relevance: 1.00 | Views last month: 40 | Catalog Last Checked: November 03, 2026 at 11:23 PM -
Data Quality Warning: Appeals for many years are currently missing from this dataset as we repopulate our system of record with updated records. We will update this text when the data has been...
Search relevance: 1.00 | Views last month: 36 | Catalog Last Checked: November 03, 2026 at 11:23 PM -
Commercial valuation data collected and maintained by the Cook County Assessor's Office, from 2021 to present. The office uses this data primarily for valuation and reporting. This dataset...
Search relevance: 1.00 | Views last month: 10 | Catalog Last Checked: October 20, 2026 at 11:17 PM -
This is the data set of residential sales used by the Cook County Assessor in their Computer Assisted Mass Appraisal system used to assess residential property values. This data set contains...
Search relevance: 1.00 | Views last month: 6 | Catalog Last Checked: September 10, 2026 at 06:27 PM -
Neighborhood polygons used by the Cook County Assessor's Office for valuation and reporting. These neighborhoods are specific to the Assessor. They are intended to represent homogenous housing...
Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: October 20, 2026 at 11:18 PM -
This data set contains characteristic data points used by the Cook County Assessor in the 2021 Chicago reassessment to produce initial estimates of the current market value of most Chicago homes...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 06:27 PM -
Real estate sales data used by the Cook County Assessor to estimate Fair Cash Values for the purpose of property taxation. Deeds that include multiple PIN numbers are excluded from this data. This...
Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 06:27 PM -
Cook County 10-digit parcels with attached distances to various spatial features. When working with 10-digit Parcel Index Numbers (PINs) make sure to zero-pad them to 10 digits. Some datasets may...
Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: October 20, 2026 at 11:18 PM -
In response to the 2020 COVID-19 pandemic and its anticipated effects on the residential real estate market, the Cook County Assessor will adjust residential assessments. This data can be used to...
Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 06:28 PM -
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...
Search relevance: 1.00 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 06:28 PM -
Every assessed value in Cook County 2010 to 2020, and appeal indicators. Each PIN has three stages of assessments each year: CCAO Mailed, CCAO Certified, and Board of Review (BOR) Certified final...
Search relevance: 1.00 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 06:28 PM -
A brief outline of the changes users can expect from the Assessor's open data offerings.
Search relevance: 1.00 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 06:27 PM
