Supervisor of Assessments

Welcome to the Supervisor of Assessments Office of Ogle County, Illinois.  This county department administers the property assessment cycle for the local real estate tax.

Property taxes have been around since the beginning of our country’s history. Today, your property taxes provide much of the funding of our local schools and other government agencies. The property tax is a local tax; it is administered by local officials and the funds raised stay in the local community. While the State of Illinois prescribes rules and laws for administering the property tax, the state does not collect any property tax revenue.

Most of your property tax bill (about 60 percent) goes to your local school district. The remainder is shared by the county, municipalities, park districts, library districts, fire districts, townships, and other special districts.

Unlike income taxes or sales taxes, which are based on a percent of income or sales of merchandise,  property taxes are based on the value of real estate. Historically, property holdings were a tangible measure of wealth and ability to pay, and thus a resource upon which governments could draw funds. Property taxes are also a relatively stable source of income for local agencies. In contrast, income and sales taxes can fluctuate much more, as they are more susceptible to the ups and downs of the local economy.

Your real estate tax bill begins with the work of your elected township assessor. It is the assessor’s job to place values on the property within his/her jurisdiction. All property except farmland is supposed to be assessed at 33 1/3 percent of its market value. Assessments are also supposed to be uniform throughout a jurisdiction.

Should you have any questions, please feel free to give my office a call (815) 732-1150.


James Harrison
Supervisor of Assessments



If your property has been destroyed by the April 9th storms, and you are considering rebuilding, you may have assessment related questions. Some of the following questions and answers could be helpful. You are also welcome to contact our office for additional questions or information.

Question: What must I do to have my property assessed value checked or adjusted?
Answer: Nothing. The Township Assessors currently are working in all affected storm damage areas to
account for damaged properties. If you would like to assure that your property be looked at for
assessment revalue purposes, please call us, email us or contact your township assessor.

Question: How will an adjustment be calculated?
Answer: April 9th was the 99th day of the year, with 266 days or 73% of the year left. The assessed
value of improvements destroyed by the tornado will be reduced by 73% for 2015, payable on the tax
bill which comes out in 2016. The 2014 tax bill that comes out in May of 2015 will not be

Question: Will I be notified of the change of assessment?
Answer: Yes. Assessment change notices will be mailed to owners, sometime in late September.

Question: Is there any important information I should know as I plan to rebuild?
Answer: Yes. Legislation has made available a “Natural Disaster Homestead Exemption”. This protects
citizens from higher market values and assessed values to replace the square footage destroyed by
the storm. This can be a very valuable consideration as to rebuilding. This exemption stays on the
property as long as it is under the original ownership and used for their primary residence.
Application is only necessary at the time of the completion of the rebuilt structure.

Question: I know that my replacement house will cost more, and will be assessed more than my
destroyed home. Is there any mechanism to protect me from a large increase in my taxes? Answer:
Yes. Form PTAX-327, “Application for the Natural Disaster Homestead Exemption” provides information
on such a program, and is a recently added change.

Question: Can you give me an example of how it works?
Answer: If your former house (exclusive of lot) had a market value of $180,000 and an assessed
value of 60,000 AV (1/3 of market value); and to replace the same square footage required
$210,000 (or 70,000 AV) then the “Natural Disaster Homestead Exemption” would exempt 10,000 AV from
tax extension (the increase from the former assessment to the new).

Question: What if I built more?
Answer: The exemption covers the reconstruction up to 110 percent of the original square footage,
and anything beyond that is not covered by the exemption.

Question: What must I do to qualify?
Answer: Application is not required until completion of the rebuilt structure, by the same owner
who suffered the loss.



2015 property assessments have been published in the local newspapers on October 8, 2015.

The deadline to file an appeal for 2015 is November 9, 2015.


James Harrison, Supervisor of Assessments

Karen Churney, Chief Deputy

Carol Magnuson, Deputy

Tricia Black, Deputy

Joyce Toms, Deputy