Northfield Township Property Taxes

With a diverse population and a large variety of incomes, Northfield Township is a cosmopolitan suburb of Chicago. A convenient commuter hub, towns such as Northbrook, Northfield, and Glenview attract more residents every year. Like most of northern suburban Cook County, the population is largely made up of people wishing to escape the urban sprawl of Chicago. With a wide array of housing and business options, Northfield Township has a vivid spectrum of property values. However, like the rest of Cook County, these communities are experiencing record increases in both property values and Cook County property taxes. There are ways to lower these, which many across Cook County are using fully to their advantage.

Northfield Reassessment

The Cook County Assessor’s Office (CCAO) reassesses a third of the county every year. In 2025, Northfield joined the other northern suburbs in being fully reassessed. This is usually a time for massive spikes in property values, and this was certainly the case. The overall value of homes in Northfield Township increased by $5.56 billion, with many homes seeing increases of over 30%. The overall value for businesses spiked an astounding 28%, with many pieces of commercial real estate increasing even more. While 2026 will be a year without reassessment, costs can still climb thanks to tax rates, the equalization factor, and falling taxes in places such as the Loop, pushing increased costs onto homeowners.

Methods for Lowering Property Taxes in Cook County

Reassessments across Cook County have spurred taxpayers of all types to explore ways to lower their tax bills. While tax rates cannot be reduced, the values that tax bills are based on can be. The CCAO gives every property a market value, which is what it estimates a piece of real estate will sell for on the open market by comparing property sales dating back three years. This value is then multiplied by the assessment ratio, which is 10% for homes and 25% for most businesses. This is then multiplied by equalization factor to create the equalized assessed value (EAV), which is what tax rates are applied to. Lowering EAV usually results in a smaller property tax bill. Most reduction techniques focus on getting EAV as low as possible.

Northfield Homestead Exemption

Exemptions:

These lower EAV by a flat number. The homeowners exemption, the Cook County equivalent of a homestead exemption lowers EAV by $10,000. There are many other exemptions open to homeowners, including those for veterans, seniors, those with disabilities, and more. Many can be used in tandem, providing even larger savings for those who qualify.

Northfield Property tax appeal

Property Tax Appeals:

Also known as protests, these are used to challenge the market value of properties, locking in the true value of a home or business. These are more versatile than exemptions, as they help any type of property, and can correct major errors made by the CCAO. These are becoming increasingly popular across the Chicago area and Illinois as a whole, and their use is even encouraged by the CCAO itself.

Northfield Property Tax Appeals are a Growing Necessity

If the CCAO makes a mistake in assessment and it is not corrected, it can continue to cause out-of-control taxes and value hikes in the future. Property tax appeals address these issues directly, ensuring that the taxpayer is only paying their fair share. In addition to getting a reduction in the short term, appeals can often help with savings in the long run. This is because they can solidify the true worth of a home or business, which can then be used to combat later spikes and strengthen future appeals, potentially leading to even greater savings.

While Cook County has some of the highest property taxes in the nation, it also has a unique two-tiered appeal system that no other county does. This starts with assessor appeals, which are directly with the CCAO. These are unique to Cook County and can land some serious savings. However, if this step does not offer a solid settlement, then the taxpayer can move on to more traditional appeals with the Board of Review (BOR), which are held later in the year. In addition, if a taxpayer missed the assessor appeal deadline entirely, they can still protest to the BOR.

scheduleProperty Tax Deadlines for Northfield

September 4, 2026: Assessor appeal deadline

April 1, 2026: First installment of property taxes due

November 2026: Second installment of property taxes due

Pending: BOR appeal deadline

O’Connor Offers Peerless Evidence Gathering

While appeals offer many advantages over exemptions, they do require extensive evidence. For cases of overassessment, when a home or business is assessed for more than it would sell for, the taxpayer needs to gather sales records dating back three years. For cases when a property is unfairly assessed compared to neighbors, the taxpayer needs to find several assessments that demonstrate this. Whatever the case, these properties must share many characteristics with the taxpayer’s property, including size, age, location, and the number of rooms.

We at O’Connor help the people of Northfield looking to protest their taxes by handling all of the analysis and evidence. We use data-driven techniques to discern any errors in the assessment, then use our proprietary databases to find the perfect comparable properties. We use this information to build the strongest evidence portfolio possible. Once this is put together, we will coordinate an appeal with a law firm that has expertise in property taxes. There is no upfront cost for this evidence, and our clients only pay if their taxes are lowered.

Frequently Asked Questions About Northfield Property Taxes

No, appeals, like exemptions, are purely targeted at taxable value. However, since these values are used to calculate tax bills, reducing them typically leads to significant savings.

The homeowner exemption removes $10,000 in EAV.

Residential property is assessed at 10% of its market value, while commercial property is generally assessed at 25% of its market value.

The next reassessment is set for 2028.