Lake County, Property Tax Appeal

We have an integrated solution for reducing your property taxes!

Our licensed tax agents work hand-in-hand with attorneys, appraisers, and other experts. Our research team has access to our proprietary data base to get the best evidence, including sales and unequal appraisal data, to achieve a value reduction for you. Our coordinated approach gives you the advantage in Lake county property tax negotiations with:

  • Township Assessors
  • Lake County Board of Review
  • The Illinois Property Tax Appeal Board (PTAB)
Township Deadline Date
​​Avon​ ​​​​​​September 22, 2025
​​Cuba ​​​​​​September 22, 2025

Lake County, Property Tax Appeal

Lake County Property Tax Appeal

O’Connor is the leading property tax consulting company for Lake County property owners because:

  • For 50 years, O’Connor has continuously produced results with property tax appeals.
  • O’Connor is the most aggressive property tax consultant.
  • We know the processes and appropriate contacts with townships and the Lake County Chief Assessor’s Office.
  • Our experience has allowed us to compile sales and unequal appraisal data consistent with the format expected by the Lake County and township assessors.

Jeff Cullen

Jeff Cullen, Property Tax Consultant

Jeff Cullen brings over two decades of leadership in hospitality and client service to O’Connor in his role providing support to property owners across the Chicago region. He understands the obstacles of this market, and he is dedicated to helping clients confidently navigate property tax matters.

With a background in management at high-profile hotels and gaming in downtown Chicago as well as leading customer satisfaction efforts in the luxury automotive space, Jeff combines operational insight with a strong service ethic. Jeff’s service training from the Disney Institute and Nordstrom, afforded the foundation leading to his responsiveness, attention to detail, and delivery of exceptional client experience across the local property tax landscape.

How to Protest your Property Taxes with O’Connor

1. Review your property tax assessment

  • Does it look fair and in line with previous assessments?
  • Are there any errors?
  • Is the Equalized Assessed Value (EAV) worth more than your property’s fair market value?

2. Enroll online with O’Connor

  • We scrutinize your assessments and documents.
  • Our agents research, prepare evidence, and present appeals on your behalf in hearings.
  • If a lawsuit is needed, then we will assemble a team of attorneys and experts to carry it out.

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:

  • Protests your taxes annually, accumulating better results each year.
  • Provides expert research and representation for township appeals and county hearings.
  • Builds your legal dream team if a lawsuit is needed

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)
4101 McEwen Rd, Suite 200
Dallas, TX 75244 972-243-9966

San Antonio

San Antonio Office

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

New York Office

New York Office

(By appointment only)
70 East Sunrise Hwy, Suite 500
Valley Stream, NY 11581 934-203-9917

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.