Below are the most recent methodology worksheets for each income-producing PIN (Property Index Number), class 300 and above for every township. The Assessor’s goal in publishing this data is for property owners to understand the approach to the mass appraisal of their income-producing property. To view historical data, scroll to the bottom of the page.
Follow the steps below to find your property on the methodology worksheet.
- Find your property's PIN and township: www.cookcountyassessor.com/address-search.
- Go to the township below and click on the "methodology worksheet."
- Search for your PIN within the worksheet.
City of Chicago
The worksheets below are for the latest reassessment in 2024.
South Chicago Township
Methodology Worksheet
Lake Township
Methodology Worksheet
Lake View Township
Methodology Worksheet
Hyde Park Township
Methodology Worksheet
Rogers Park Township
Methodology Worksheet
West Chicago Township
Methodology Worksheet
Jefferson Township
Methodology Worksheet
North Chicago Township
Methodology Worksheet
South & West Suburbs
The worksheets below are for the latest reassessment in 2023.
Bloom
Methodology Worksheet
Palos
Methodology Worksheet
Thornton
Methodology Worksheet
Stickney
Methodology Worksheet
Bremen
Methodology Worksheet
Rich
Methodology Worksheet
Proviso
Methodology Worksheet
Lyons
Methodology Worksheet
Worth
Methodology Worksheet
Riverside
Methodology Worksheet
Calumet
Methodology Worksheet
Oak Park
Methodology Worksheet
Cicero
Methodology Worksheet
Berwyn
Methodology Worksheet
River Forest
Methodology Worksheet
Lemont
Methodology Worksheet
Orland
Methodology Worksheet
North Suburbs
The worksheets below are for the latest reassessment in 2025. If the township hasn't been reassessed yet, the worksheet will reflect the 2022 reassessment.
Norwood Park
Methodology Worksheet
Barrington
Methodology Worksheet
Hanover
Methodology Worksheet
New Trier
Methodology Worksheet
Schaumburg
Methodology Worksheet
Elk Grove
Methodology Worksheet
Evanston
Methodology Worksheet
Palatine
Methodology Worksheet
Maine
Methodology Worksheet
Leyden
Methodology Worksheet
Northfield
Methodology Worksheet
Wheeling
Methodology Worksheet
Niles
Methodology Worksheet
Historical Information
View the full Valuation Reports for residential and commercial properties by clicking the button below. Reports for past reassessments years can also be found here.