McHenry County, Property Tax Protest

O’Connor’s coordinated approach helps you save money!

Our experienced and licensed tax agents join attorneys, appraisers, and our researchers to form one of the best teams in the business. Armed with a database brimming with key information, our employees are dedicated to helping you get the best deal on your McHenry County property tax protest. As a client with O’Connor, you benefit because our patented analytics and data-driven evidence can assist your legal team at every level in the property tax protest quest:

  • Protesting before the McHenry County Board of Review
  • Representing you in hearings with the Illinois Property Tax Appeal Board (PTAB)
Township Deadline Date
​Marengo ​​December 26, 2025
Riley January 13, 2026

McHenry County, Property Tax Protest

McHenry County Property Tax Services

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

Our services are available to all townships within McHenry County:

  • Chemung Township
  • Alden Township
  • Hebron Township
  • Richmond Township
  • Burton Township
  • Dunham Township
  • Hartland Township
  • Greenwood Township
  • McHenry Township
  • Marengo Township
  • Seneca Township
  • Dorr Township
  • Nunda Township
  • Riley Township
  • Coral Township
  • Grafton Township
  • Algonquin Townshipv



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

  • Did you find any mistakes or errors?
  • Does the assessed price seem outrageous?
  • Is the market value of your property lower than the assessed price?

2. Enroll online with O’Connor

  • No upfront costs, hidden fees, and only pay if your taxes are lowered
  • Our team of experts, agents, and researchers will help lead your legal team to greater savings
  • Skilled attorneys and paralegals will be assembled for your legal team if you need a judicial appeal

The Property Tax Protection Program™ Defends Your Legacy!

Property taxes are the only taxes that you can legally dispute. If you do not appeal, then you are handing the county money out of your own wallet. There is no risk in joining the program and it will protect your home as long as you live there.

  • A single and secure customer portal
  • No-cost subscription to tax tips all year long
  • And best of all, the program is free! You only pay if your taxes are lowered

Our Proven Process:

  • Your documents and assessments are meticulously researched
  • Our agents coordinate with your attorney to ensure they have the best evidence possible
  • If necessary, your judicial appeal will be constructed and spearheaded by O’Connor

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