New Trier Township Property Taxes

One of the most exclusive townships in all of Illinois, New Trier is home to the likes of Wilmette and Winnetka. With some of the best amenities and schools in Illinois, New Trier is one of the most in-demand areas in the entire United States. Considering that Cook County property taxes are already the highest in the nation, this is magnified even more by the high property values found in Winnetka and other towns along Lake Michigan. Due to the resources available, along with rising costs, the people of New Trier extensively utilize property tax appeals to lower their taxes.

Triennial Reassessment

New Trier is one of the townships coming fresh off the 2025 reassessment. Every year, a third of Cook County residents are reassessed by the Cook County Assessor’s Office (CCAO), typically resulting in significant increases. New Trier was certainly hit hard, with the property value of homes increasing 39% in one year. Considering the initial value of these homes, $7.6 billion in value was added in just one year. Businesses, likewise, saw a significant 34% increase. This was compounded by the fact that the entirety of Cook County’s residential properties saw an average increase of 16% in property taxes to close 2025. While this means that the township will not undergo reassessment until 2028, taxes can still increase outside of reassessment due to jumps in tax rates and the equalization factor.

Methods Used to Lower Property Values and Taxes

Thanks to historic increases, homeowners and businesses are exploring how best to get a cut on their taxes. While Cook County has raised taxes for 30 straight years, there are still some options that taxpayers can use to help even the odds. With so much money in the balance, these techniques pay even higher dividends in New Trier than they do in the rest of Illinois. Many of these options have practically become mandatory when it comes to protecting homes and businesses from aggressive assessment.

New Trier Homestead Exemption

Exemptions:

The gold standard when it comes to reducing taxable value. This is applied after the equalization factor, but before tax rates. The standard homeowner’s exemption in Cook County cuts $10,000 in equalized assessed value (EAV). There are plenty of other options, including those for people over 65, those with disabilities, and veterans. Every last exemption that a taxpayer is eligible for should be applied.

New Trier Property Tax Appeal

Property Tax Appeals:

These challenges to the CCAO generally go after the market value. These are used to fix issues with factual errors, lack of uniformity, or overassessment. These have become commonplace over the past decade, and even the CCAO recommends that every taxpayer appeal if possible.

cost segregation real estate

Cost Segregation:

This IRS-backed technique is targeted at federal income taxes instead of property taxes, but represents one of the best property tax reduction options available to businesses. This utilizes the accelerated depreciation of real property to shield a business from income taxes, often eliminating them entirely. Often, a cost segregation study pays for itself more than a dozen times.

Cook County Appeals can Significantly Cut Taxes

While much of Cook County is catching on to the power of appeals, the homeowners and businesses of New Trier have been practicing them in volume for decades. Thanks to being loaded with premium properties, the township has always felt the gaze of the CCAO upon it and has seen some of the highest tax levies in America. By disputing the values of the CCAO every year, the people of New Trier ensure that they are only paying what they owe, and not a penny more.

An appeal starts by reviewing the assessment notice. It should be scanned for any factual errors first, as these are the easiest to remedy. Once factors like ownership, size, classification, and improvements are verified, it is time to check the values. If the market value looks incorrect or has recently spiked, then it should be protested for possible overassessment. By looking at the assessments of your neighbors, you can also see if your assessment is consistent with those that share your property’s characteristics. If your real estate is assessed higher, then you have grounds to appeal on the lack of uniformity. When choosing to appeal, you need solid grounds; you cannot protest simply because your taxes are too high.

While being late on taxes can cost taxpayers more in penalties and interest, there are other deadlines that should be tracked as well. For instance, missing the appeal or exemption deadlines means missing out on those particular avenues of tax reduction for a whole year. Cook County taxpayers do have two chances to file appeals, which is better than the rest of Illinois. First, there is the assessor appeal, which is directly with the CCAO. Then, months later, there is a formal appeal with the Board of Review (BOR).

scheduleVital New Trier Deadlines

April 1, 2026: First installment of property tax payments is due

May 7, 2026: Assessment notices mailed

May 15, 2026: Exemption filing deadline

June 22, 2026 (or 30 business days after the assessment was sent): Assessor appeal deadline

September 1, 2026: BOR appeal deadline

Pending: Second installment of taxes due

O’Connor Helps with Vital Evidence

In order for a property tax appeal to be successful in achieving a tax reduction, it needs to be backed by evidence. To show overassessment, you will need property sales dating back three years for homes or businesses that are similar to yours. To demonstrate to the CCAO or the BOR that you are being assessed unequally, you will need to collect the assessments of neighboring properties. Collecting this information and bundling it into a strong portfolio takes time, skill, and expertise.

We at O’Connor are here to help. For over 50 years, we have been gathering evidence, performing analysis, and advising clients on appeals. When you sign up with us, we will analyze your assessment for issues, dissect your values, and determine if you should appeal. Then, we will use data-driven techniques to gather the evidence needed, including using our patented databases to find the perfect comparisons in sales and assessments. Once gathered, we will coordinate an appeal with an expert attorney who knows how to impress the CCAO and BOR. You will pay nothing for this evidence unless you and your attorney can lower property taxes.

Frequently Asked Questions About New Trier Property Taxes

No, this simply corrects issues in valuation by the CCAO and has no impact on what your home will sell for on the open market.

This is a multiplier that brings Cook County properties back into compliance with statewide requirements in assessment and taxation. It ensures that a property is assessed at 33.3% of its value.

For Cook County, the homeowner’s exemption is good for a reduction of $10,000.

By Illinois law, you can only be represented by licensed attorneys.