Found 30 datasets matching filters.
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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 | Published on: 2026-01-31 -
Historical permit data submitted by municipalities to the Cook County Assessor's Office. When working with Parcel Index Numbers (PINs) make sure to zero-pad them to 14 digits. Some datasets may...
Search relevance: 1.00 | Views last month: 9 | Published on: 2026-04-20 -
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: 6 | Published on: 2026-04-20 -
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: 6 | Published on: 2026-03-07 -
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 | Published on: 2026-01-31 -
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: 4 | Published on: 2026-04-20 -
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...
Search relevance: 1.00 | Views last month: 2 | Published on: 2026-04-20 -
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: 2 | Published on: 2026-04-20 -
Single and multi-family (less 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 this data...
Search relevance: 1.00 | Views last month: 2 | Published on: 2026-04-20 -
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: 1 | Published on: 2026-04-20 -
A current-year-only 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 | Published on: 2026-04-20 -
A brief outline of the changes users can expect from the Assessor's open data offerings.
Search relevance: 1.00 | Views last month: 1 | Published on: 2025-08-06 -
Appeals for many years are currently missing from this dataset as we repopulate our system of record with updated records. We expect all missing appeals to be available again before the end of...
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-04-20 -
A brief outline of the changes users can expect from the Assessor's open data offerings.
Search relevance: 1.00 | Views last month: 1 | Published on: 2025-08-06 -
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: 1 | Published on: 2026-04-20 -
Neighborhoods play an important role in residential property assessment. Single-family and residential multi-family property assessments are sensitive to neighborhood boundaries. Neighborhoods are...
Search relevance: 1.00 | Views last month: 0 | Published on: 2026-01-31 -
As of February 14, 2020 this dataset will be considered archived information and will no longer be updated. First-pass property values as assessed by the Cook County Assessor in their Computer...
Search relevance: 1.00 | Views last month: 0 | Published on: 2026-01-31 -
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: 0 | Published on: 2026-01-31 -
Assessment dataset used by the Cook County Assessor in their Computer Assisted Mass Appraisal (CAMA) system used to assess residential properties in Northern Triennial Townships. This dataset...
Search relevance: 1.00 | Views last month: 0 | Published on: 2026-01-31 -
A data set showing algorithmically determined sales comparables for single family properties in Lake Township
Search relevance: 1.00 | Views last month: 0 | Published on: 2026-01-31
