We represent owners of office, retail, industrial, and investment properties throughout Cook County with market-level valuation expertise.
Chicago Property Tax Group combines deep property tax expertise with hands-on commercial real estate experience. We use the same institutional-grade data sources and analytical frameworks as the nation's top appraisers — because we know the Chicago commercial market firsthand.
Comprehensive representation at all three levels: the Cook County Assessor's Office, the Board of Review, and the Illinois Property Tax Appeal Board or Circuit Court.
We secure Class 6b, 7a, 7b, 8, and other incentive classifications that can reduce your assessment level from 25% to as low as 10%.
Income capitalization, sales comparison, and cost approach analyses leveraging CoStar, Trepp, and proprietary market data.
Multi-property, multi-year appeal strategies for institutional investors. We track every deadline across your entire holdings.
Detailed real estate tax projections for acquisition due diligence, budgeting, and financial modeling.
Expert guidance on tax proration clauses for commercial leases and property transactions.
We handle everything from initial analysis through final determination — so you can focus on your business.
We review your current assessment, property characteristics, income data, and comparable properties to determine appeal merit and potential savings.
Our team builds a comprehensive appeal package using income analysis, comparable sales, cost data, and market research from institutional-grade sources.
We file at the appropriate level and present your case with the same rigor as a courtroom proceeding.
Upon determination, we provide a detailed summary of savings achieved and advise on strategy for subsequent assessment years.
There is no risk to appealing.
An in-depth guide to assessment, appeals, and taxation in Cook County, Illinois.
Cook County is the only county in Illinois that applies different assessment levels to different property types. Commercial properties are assessed at 25% of market value, while residential properties sit at just 10%. This disparity makes accurate valuation and timely appeals essential for every commercial owner.
The Assessor uses income capitalization, sales comparison, and cost approaches. For income-producing properties, the primary method divides Net Operating Income by a market-derived cap rate to estimate market value.
Your tax bill is: Assessed Value × State Equalization Factor × Tax Rate. The equalization factor typically exceeds 3.00 in Cook County — amplifying even modest assessment errors into thousands of dollars in excess taxes.
Contest your assessment at the Assessor's Office, the Board of Review, or the Illinois Property Tax Appeal Board (PTAB) / Circuit Court. Each level has specific rules, evidence requirements, and deadlines.
Class 6b, 7a, 7b, and 8 incentives can reduce your assessment level from 25% to as low as 10%, yielding tax savings of more than 50% for qualifying commercial and industrial projects.
Cook County is divided into three reassessment districts on a rotating three-year cycle. A reduction secured in your reassessment year locks in for the full cycle — making it the most critical time to appeal.
“They reduced the assessment on our Michigan Avenue retail space by over $800,000. The entire process was seamless, and we didn't have to lift a finger.”
“We manage a portfolio of industrial properties across Cook County. Chicago Property Tax Group handles every appeal, every year. Their market knowledge is unmatched.”
“After our triennial reassessment came in 30% higher, they secured a significant reduction at the Board of Review. Highly recommend.”
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