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South Holland property tax appeal 2026
All of South Holland's homes in our data are in Thornton Township, so South Holland homeowners follow Thornton Township's 2026 appeal dates. Appeals go to the Cook County Assessor and the Board of Review, not to the city.
South Holland appeal deadlines 2026 by township
| Township | Assessor | Board of Review |
|---|---|---|
| Thornton Township100% of South Holland's parcels | open until Nov 23 | not announced yet |
Dates: Assessor's calendar and Board of Review dates, checked on October 9, 2026.
South Holland homes at a glance
- 7,949 residential (class 2) parcels, of them 7,679 houses and 64 condominium units.
- Main ZIP codes: 60473.
Property tax on a typical South Holland house
Our estimate for the median house in South Holland: about $8,900 a year (median 2025 assessed value $19,548). 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 7,670 houses (classes 202–209, 234, 278).
South Holland homeowners at the Board of Review last year
For tax year 2025, 1,020 South Holland homeowners filed on their own at the Board of Review for a house, and 559 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 South Holland
- 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 South Holland in?
South Holland is in Thornton Township.
What is the South Holland property tax appeal deadline in 2026?
It depends on the township. Thornton Township: Assessor last file date November 23, 2026.
Do I appeal to the City of South Holland?
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 South Holland house pay?
Our estimate for the median house is about $8,900 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
Sources
- Cook County Assessor — assessment calendar and deadlines
- Board of Review — dates and deadlines
- Cook County open data — Parcel Universe
- Cook County open data — Assessed Values
- Cook County Assessor — residential appeals
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.