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New Trier Township: 2026 appeal windows have closed
Places with the most homes in New Trier Township: Wilmette, Winnetka, Glencoe, Glenview, Kenilworth, Northfield, Unincorporated areas.
Both 2026 windows have closed (Board of Review: September 1, 2026).
What is still possible: an appeal to the Property Tax Appeal Board (state level) after the Board of Review decision (how PTAB works), claiming a missed exemption for past years (Certificate of Error), and preparing for next year's window.
New Trier Township 2026 dates
| Assessor notices mailed | May 7, 2026 |
|---|---|
| Assessor appeals open | May 7, 2026 |
| Assessor last file date | June 22, 2026 |
| Board of Review open | August 3, 2026 |
| Board of Review close | September 1, 2026 |
| Board of Review evidence due | September 11, 2026 |
Sources: Assessor's assessment calendar, Board of Review 2026 open/close dates (PDF). Checked on October 2, 2026.
Was New Trier Township reassessed in 2026?
No. New Trier is in the north suburbs, which the Assessor is not reassessing in 2026. Here a property is reassessed only if there is a change due to division work, permit applications or other special circumstances; then the owner gets a Reassessment Notice.
You can still appeal in 2026. The Assessor's calendar lists New Trier with its own appeal window for this year.
Source: Assessor's calendar.
New Trier Township at a glance
- 21,412 residential (class 2) parcels, including 2,112 condominium units.
- Cities and villages with the most homes: Wilmette (10,255), Winnetka (4,495), Glencoe (3,451), Glenview (1,152), Kenilworth (921), Northfield (911), Unincorporated areas (224).
- Main ZIP codes: 60091, 60093, 60022, 60025, 60043.
Our calculation from Cook County open data (Assessor Parcel Universe), October 5, 2026. Townships, cities and ZIP codes overlap, so the address check is the reliable way to confirm yours.
Appeals in New Trier Township last year
For tax year 2025, 14,722 residential property appeals from New Trier Township were filed at the Board of Review, and 13,597 at the Assessor. Appealing is a routine step for many owners here.
Our count from Cook County open data (Board of Review Appeal Decision History, Assessor Appeals), counted by property, not official figures.
How to file in New Trier Township
- Confirm your PIN and township. Use the Assessor's address search or our free check below.
- Check the notice. The Assessor's rule of thumb: if the characteristics on your notice are correct and the estimated market value is within 10% of what you think your home is worth, an appeal is unlikely to change much. Wrong square footage, rooms or other characteristics are a reason to appeal.
- File online with the Assessor. On the county's online appeal site choose the residential appeal (or "Residential with Comparable Grid" if you argue lack of uniformity). The Assessor says filing is free and can take as little as 20 minutes, and that you don't need to hire anyone.
- Comparables are optional. Assessor analysts review similar homes themselves. You may attach up to 6 comparable PINs from your neighborhood that resemble your home in size and style.
- Board of Review is a second chance. When the Board opens New Trier, you can file there too (online, free). Individual owners may represent themselves; the Board's decision sets the final county value for the year.
More detail: how to appeal step by step · Assessor or Board of Review · choosing comparables.
What our packet adds
Filing is free and you can do it without us. If our free check says your home is assessed above similar homes, you can buy a document packet for $49: the comparable homes, the value to ask for, suggested text and step-by-step filing instructions for New Trier Township.
- One-time $49. No subscription and no share of your savings.
- Refund: if you file using the packet and the county does not lower your assessed value, send us the decision within 30 days and we refund the full price (terms).
- You file yourself on the county's site. We don't file or represent anyone, and no result is guaranteed.
Questions
What is the New Trier Township appeal deadline in 2026?
The Assessor's last file date for New Trier Township is June 22, 2026. The Board of Review window is August 3, 2026 to September 1, 2026.
I missed the Assessor deadline. What now?
Both 2026 windows have closed. You can still look at a Property Tax Appeal Board appeal after a Board of Review decision, claim missed exemptions for past years, and appeal next year.
Should I appeal to the Assessor or the Board of Review?
You can do both. The Assessor's window comes first; the Board of Review is a separate agency and its decision sets the final county value for the year.
Was New Trier Township reassessed in 2026?
No. The north suburbs and the City of Chicago are not reassessed in 2026, except properties with division work, permits or other special circumstances. You can still appeal.
Can appealing raise my assessment?
Under Illinois law (35 ILCS 200/16-95) the Board of Review may not increase an assessment unless the owner is first notified in writing and given a chance to be heard.
I think I missed an exemption. Can I get it back?
Missed homeowner and other exemptions for past years can be requested from the Assessor through a Certificate of Error. The Assessor's page currently lists tax years 2021 to 2025 for the homeowner exemption.
Nearby townships
Sources
- Cook County Assessor — assessment calendar and deadlines
- Cook County Assessor — appeals overview
- Cook County Assessor — residential appeals
- Board of Review — 2026 township open/close dates (PDF)
- Board of Review — residential appeals
- Illinois Property Tax Code 35 ILCS 200/16-95
- Cook County Assessor — Certificate of Error
Dates last checked against the Assessor's calendar and the Board of Review's published dates on October 2, 2026. If anything here differs from the county's own pages, the county's pages win.