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Niles property tax appeal 2026: deadline by township

Niles is split between 2 Cook County townships, and each has its own 2026 appeal dates. Most homes are in Maine Township (67% of residential parcels) and Niles (33%). Your deadline depends on the township your home is in, not on the city.

Niles appeal deadlines 2026 by township

Township	Assessor	Board of Review
Maine Township67% of Niles's parcels	closed Jul 21	closed Sep 29
Niles Township33% of Niles's parcels	not announced yet	not announced yet

Not sure which township your home is in? It is printed on your assessment notice, or type your address in the free check below. Dates: Assessor's calendar and Board of Review dates, checked on October 9, 2026.

Niles homes at a glance

10,684 residential (class 2) parcels, of them 6,760 houses and 2,338 condominium units.
Main ZIP codes: 60714.
Township split: Maine 7,206, Niles 3,478 parcels.

Property tax on a typical Niles house

Our estimate for the median house in Niles: about $8,400 a year (median 2025 assessed value $38,802). An appeal lowers the assessed value, which is one part of that bill; exemptions, the state equalizer and local tax rates are the others.

Our calculation from Cook County open data, not official figures and not your bill: 2025 final assessed value × the 2025 state equalizer × the 2025 tax rate of the home's tax code, minus the homeowner exemption, for 6,759 houses (classes 202–209, 234, 278).

Niles homeowners at the Board of Review last year

For tax year 2025, 619 Niles homeowners filed on their own at the Board of Review for a house, and 474 of them got a lower value.

Private houses, appeals filed without an attorney. Source: Cook County Board of Review open data (Appeal Decision History), our analysis, not official figures. Results for every township.

How to appeal in Niles

Find your township. It is on your assessment notice; the free check below shows it from your address.
File with the Cook County Assessor while your township's window is open. Filing is free and online; you don't need to hire anyone.
Board of Review is a second chance. When the Board opens your township, you can file there too, also free.

Step by step: how to appeal · choosing comparables · Assessor or Board of Review.

Questions

Which township is Niles in?

Niles is split between Maine (67%), Niles (33%) townships, by our count of residential parcels. Your assessment notice shows yours.

What is the Niles property tax appeal deadline in 2026?

It depends on the township. Maine Township: Assessor last file date July 21, 2026, Board of Review August 31, 2026 to September 29, 2026. Niles Township: Assessor dates not announced yet.

Do I appeal to the City of Niles?

No. Assessment appeals in Cook County go to the Cook County Assessor and then the Board of Review. Filing with either is free.

How much property tax does a typical Niles house pay?

Our estimate for the median house is about $8,400 a year, from 2025 assessed values and tax rates in county open data. It is not an official figure; your bill shows your own amount.

About Cook Tax Check

Cook Tax Check is an independent service run by Virix Ltd. We are not the county and not a law firm. Our check of your home against similar homes is free. If it looks worth appealing, our document packet costs $49. Savings Guarantee: no savings? Your next appeal is on us. If the Assessor says no, we prepare your Board of Review appeal for free, and if neither office lowers your value, your appeal package for next tax year is on us (terms). You file yourself, for free, on the county's website — we don't file or represent anyone. See a sample packet.

Nearby

All cities · All 38 townships and deadlines

Sources

Dates last checked against the Assessor's calendar and the Board of Review's published dates on October 9, 2026. If anything here differs from the county's own pages, the county's pages win.