If you are purchasing a new construction home it may be difficult to estimate your tax bill.  The first bill you receive may be for more or less than 12 months depending on when your certificate of occupancy was issued by the building department.  Because assessments and tax rates change yearly, you should expect your tax bill to change yearly.   A ballpark estimate for a full 12 month tax bill on a newly constructed home is approximately 3% - 3¼% of your sale price.  Historically, taxes increase annually in our area.  Please budget accordingly and contact our office with any questions or concerns.

Informational Video

Two separate factors make up your tax bill: the assessment and the rate. The Assessor’s Office is responsible for assessing every property in the township at as close to one third of market value as possible. This will assure that each taxpayer will bear their fair share of the tax burden. The tax rate, on the other hand, is determined by the voters, the municipalities, school boards and other taxing bodies in the area. If you are concerned with the rate you are paying, please contact your taxing bodies. If you feel your assessment is unfair please call our office and request information on how we determined the value for your property.

Click here for more information on how tax bills are calculated

There are a number of factors that combine to ultimately influence tax bills:

  • Inflation – Simply put, the cost of everything goes up over time. Local taxing bodies are not exempt from this. Operating costs for those taxing bodies, whether for utilities, supplies, or any number of other expenses, are all subject to inflationary increases. These increases are then accounted for in the taxing bodies’ levies.
  • Increased Levies from Some Taxing Bodies – A higher tax burden overall is generally the result of the local taxing bodies requiring more money to operate year over year. If the total pool of tax dollars levied for increases, tax bills as a whole go up.
  • State Budget Shortfalls – One of the reasons that local taxing bodies may have to increase their levies is due to expected contributions from the State of Illinois coming up short. If a taxing body is counting on money coming from the State, and it is not delivered, then those dollars need to be made up for, generally in the form of an increased levy.
    Lack of Commercial Tax Base – The limited amount of Commercial and Industrial property in the area providing tax revenue causes more of the burden to shift to the homeowners
  • Tax Abatements Granted to Businesses – The already low Commercial and Industrial tax base is being abated for some new businesses to encourage them to come to the area and for some existing businesses to encourage them to stay. This is partially due to the state income tax rates and policies affecting businesses and discouraging operations in Illinois. Again, fewer tax dollars from businesses means more of the burden lies with homeowners.
  • A Community that Grew Quickly – Our area experienced rapid growth prior to the economic downturn. Our community planned for continued growth, and implemented the infrastructure to support it. The abrupt stop in growth and new construction tax dollars left us with a burdensome infrastructure.
  • Lack of New Residential Construction – In the years where our area experienced growth, much of the increased budgetary needs of our local taxing bodies was met by the increased tax dollars being provided by new tax revenue from new homes being built. The construction of new residential homes in our area has slowed. This again shifts the increased tax burden to the existing homeowners.
  • Devaluation of High-End Property – When the economy was flourishing, high dollar homes and properties shared a significant portion of the tax burden. However, the housing market crash hit these types of properties extremely hard, more so than your typical single-family homes. As a result, these homes do not share as high a proportion of the tax burden as they once did, again shifting more of the responsibility to other homeowners. 
  • Devaluation of Vacant Land – Similar to the issue with High-End Properties, prior to the economic downturn vacant land was at a premium, and was taxed as such. Now, that same land sells for less, especially individual lots that have already been subdivided, but still sit empty in half-finished neighborhoods. Once again, less tax burden on the vacant land means more on the homeowners.


We will certainly look at any appraisal brought to us. However, most appraisals are done using a valuation system far different from the one we use. An appraised value can only be considered if the comparables and methods used by the appraiser follow the same guidelines of valuation set forth by the Illinois Property Tax Code.

The value we assign to a home is based upon a study of sales of comparable homes occurring over the prior 3 years (For 2017, we looked at 2014, 2015 and 2016 sales). These sales must also all be valid, non-foreclosure situations. What homes are selling for in the current year have no effect on the market value assigned for tax purposes.

Current listings do not have an effect on the market value assigned for tax purposes. The only information used to determine value is the valid sales completed in the prior 3 years. A current listing do not factor into the market values assigned for tax purposes, regardless of how long it has been on the market without selling.

These houses may be valued differently because their actual market values may vary. Location plays an important part in establishing market value. General location, distance from schools, distance from commercial facilities, quality of surrounding properties and neighborhood amenities are examples of factors that could cause a purchaser to pay more for a home in a specific neighborhood than in another.

Once you receive your bill, it is too late to appeal for that assessment year. If your assessed value is changed by the township assessor, it will be published in the local newspaper in August. The publication begins the appeal season. Your first step is to contact our office. If we feel we are unable to adjust your assessment, you may file an appeal with the Board of Review. The deadline to do so is 30 days after the newspaper’s publication of the assessment values. Appeal forms can be obtained either at our office or online at http://www.willcountysoa.com/board-of-review/assessments-appeals-process.aspx. Click here for more information on important dates and Assessment Notices.

Yes. If you would like to review your property record card, stop in the Plainfield Township Assessor's Office at 22525 W. Lockport St. in Plainfield. Our office is open Monday through Friday 8:00am to 4:00pm. Or we would be happy to mail, fax or email you a copy, FREE of charge.  NEW: Property Record Cards are now available online through the property search.

We are happy to answer your questions.  Give us a call at (815)436-5110 or email us at info@plainfieldassessor.com.  We are also available to speak to groups.

Assessor's Office Disclaimer

The information contained on this site was compiled from data available at the Plainfield Township Assessor's Office solely for the governmental purpose of property assessment. This information should not be relied upon by anyone as the final determination of ownership of property, market value and/or for any other purpose without verification of the information with official records on file. No warranties, either expressed or implied whatsoever are provided for the accuracy of data contained herein, its use, or its interpretation. Although information is updated periodically, the information contained herein may not accurately reflect the most current data available. The assessed values and other information may not be certified and may be subject to change before being finalized for ad valorem tax purposes without notice. The Plainfield Township Assessor assumes no responsibility, nor liability for any unauthorized dissemination of the information and/or damages arising from the use of the property data contained herein.