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Cook County IL Assessment Appeal

Learn more about our integrated solution for reducing your property taxes

  • Yes, O’Connor CAN help you reduce your property taxes in Cook County
  • Yes – there is NEVER a fee unless we reduce your property taxes
  • Simple online enrollment in just 2 or 3 minutes

According to the 2024 Assessment Calendar, City of Chicago properties will undergo reassessment this year. Townships included in the reassessment are listed below. Other townships in Cook County are not scheduled for reassessment, but individual properties may be reassessed if there are significant changes. Property owners may file for an appeal even if their property is not reassessed.
List of Townships: Rogers Park, West Chicago, Lake View, Hyde Park, Lake, Jefferson, North Chicago, South Chicago.


Property Tax Protection Program is powered by O’Connor & Associates

  • Free enrollment: no credit card required. No upfront fees. Pay nothing unless we reduce your property taxes.

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Cook County Property Tax Appeal

When O’Connor’s team represents your property for appeal, we handle all the details. Our licensed tax agents work hand-in-hand with attorneys, appraisers, and our research team has access to our proprietary database to get the best evidence including sales and unequal appraisal data to defend a value reduction for you. Our tax reduction services and advisors are second to none in achieving your goals. Our coordinated approach gives you the advantage. We pursue each step in the system to lower your taxes:

  • Negotiations with the Cook County Assessor
  • Cook County Board of Review
  • The Illinois Property Tax Appeal Board (PTAB)
cook county map


Kelsie Neahring, Property Tax Consultant

Kelsie Neahring heads residential and commercial property tax consulting for O’Connor’s Chicago office. Prior to joining O’Connor, Kelsie worked for the Kendall County State’s Attorney’s Office as a criminal litigator. Her experience in trials and hearings provides O’Connor’s clients with an advantage in hearings and negotiations. She enjoys crafting innovative ways to make arguments and build evidence for hearings. Kelsie is a graduate of Chicago-Kent College of Law, Illinois Institute of Technology.

ENROLL TODAY In the Property Tax Protection Program™

Your property taxes will be aggressively protested every year by the #1 property tax firm in the country. If your taxes are not reduced you PAY NOTHING, and a portion of the tax savings is the only fee you pay when your taxes are reduced! Many FREE benefits come with enrollment.

How to Begin Your Property Tax Protest with O’Connor

1. Review your property tax assessment

  • Does it look right? Do you feel it should be lower?
  • Are these mistakes?
  • Is the assessor’s market value higher than actual market value?

2. Enroll online with O’Connor

  • We analyze existing documents
  • Our agents research, prepare evidence and present appeals on your behalf
  • Your assigned team coordinates a mutually agreed lawsuit when appropriate

The Property Tax Protection Program™ Works for You!

It’s YOUR RIGHT to file a property tax appeal each year. It’s also YOUR MONEY that the County keeps when you overpay. Not anymore! Enrollment in the RISK-FREE program means your family is protected for as long as you own your home.

  • No cost to enroll
  • Free secure customer portal designed for your convenience
  • Free subscription to tax saving tips throughout the year

Our Proven Process:

  • Analyzes existing assessments
  • Researches, prepares and presents property tax appeals on your behalf at informal hearings
  • Coordinates a mutually agreed lawsuit, if appropriate

You are not billed for court costs, appraisals, expert witness fees or legal fees. You pay us only if we reduce your taxes! You have zero risk.

Property Tax Locations

Chicago Office

Chicago Office

(By appointment only)
75 Executive Drive,
Suite 349, Aurora, IL 60504 708-630-0944

Houston Office

Houston Office

(Corporate)
2200 North Loop West,
Suite 200 Houston, TX 77018 713-686-9955

Dallas Office

Dallas Office

(By appointment only)
12300 Ford Rd., Suite #414
Dallas, TX 75234 972-243-9966

San Antonio

San Antonio Office

(By appointment only)
8632 Fredericksburg Rd Ste 105
San Antonio TX 78240 210-226-0829

Georgia Office
Georgia Office

Atlanta Office

(By appointment only)
4751 Best Road, Suite 316,
College Park, GA 30337 770-835-4126

Property Tax Protection Program Benefits
  • No flat fees or upfront costs. No cost ever unless your property taxes are reduced.
  • All practical efforts are made every year to reduce your property taxes.
  • Never miss another appeal deadline.
  • Property taxes protested for you annually.
  • You do not have to accept the appraisal district's initial guesstimate of value.
  • We coordinate with you regarding building size / condition to avoid excess taxes.
  • Free support regarding homestead exemptions.
  • Some years are good - typically 6 to 7 out of 10 will result in tax reduction for you.
  • The other 3 to 4 years out of 10 we strike out. Most often due to people issues in the hearing process. Some years we get an easy appraiser at the informal; some years someone who is impossible to settle with.
About O'Connor
Property Tax Help Specialists

O’Connor provides property tax appeal services to over 100,000 clients in over 40 states. Client tax savings totaled over $120 million in 2020. O’Connor has been serving property owners since 1974, almost 50 years. Client tax savings total over $1,000,000,000.

O’Connor measures its success in client property tax savings, not billings. Our goal is to save clients $1 billion annually.

With over 200 property tax experts, many of whom have worked with us for 10+ years, O’Connor has the expertise to help with your property tax questions and appeals. We literally wrote the books on property tax reduction:

  1. Mass Appraisal for Commercial – What Every Commercial Property Owner Should Know!
  2. What You Need to Know about Business Personal Property
  3. Cut Your Texas Property Taxes

The steps to appeal are complicated and may seem like too much work, but when O'Connor represents your property for appeal, we handle the details. We provide a property tax reduction service to residential homeowners in exchange for a contingency fee of 30 percent of all property taxes saved through administrative hearings or judicial appeal, for that tax year.