Cook County property tax
Schaumburg Township property tax appeal guide
Your township: Schaumburg
Cook County Assessor
Deadline: November 19, 2026 · 10 days remaining Official Cook County Assessor source ↗
Board of Review
Current dates are not verified here. Check the official source. Official Board of Review source ↗
Schaumburg Township's Assessor appeal window is open now through November 19, 2026.
File with the Cook County Assessor · $0 filing fee ↗Latest published calendar source date: November 6, 2026.
When were the calendar records checked?
- Cook County Assessor: last retrieved .
- Board of Review: last retrieved . Dates are unverified; confirm with the official source.
These are separate source retrievals, not editorial reviews or a guarantee that filing is open. A published source date can be older than its retrieval date. Missing dates do not mean there is no deadline.
Schaumburg Township extends beyond the village that shares its name, so the township—not the municipality in a mailing address—determines the assessment calendar. The township was reassessed with the North Triad for 2025 and is next scheduled for reassessment in 2028. A Board of Review window opens for Schaumburg Township every year, including non-reassessment years.
Cities and villages in Schaumburg Township
Property addresses in Schaumburg Township most often list these cities:
- Schaumburg — 13,810 single-family parcels (51% of this township's single-family parcels)
- Hoffman Estates — 7,098 single-family parcels (26% of this township's single-family parcels)
- Hanover Park — 2,695 single-family parcels (10% of this township's single-family parcels)
- Elk Grove Village — 2,114 single-family parcels (8% of this township's single-family parcels)
- Roselle — 1,037 single-family parcels (4% of this township's single-family parcels)
A city can span more than one township, so confirm your township on your assessment notice or the Cook County Assessor's site.
Recent home sales in Schaumburg Township
From August 11, 2024 through August 11, 2026, the comparison pool contains 1,620 recorded single-family sales.
- Median sale price: $405,000
- Middle-half sale price range (25th–75th percentile): $335,000–$500,000
- Median sale price per square foot: $268
- Median building size: 1,396 square feet
- Median year built: 1972
These are recorded single-family sales used as comparison evidence, not an estimate of any home's value.
Evidence to review
- For a townhome or a home in a planned development, identify properties with the same ownership form and a similar role for common areas before comparing values.
- Check whether end units, interior units, or different floor plans have physical features that make a nearby transfer less comparable.
- Use the assessment neighborhood shown in county records to organize the search instead of assuming a shared school district or village name defines the comparison area.
- If condition affects the comparison, match dated photographs to specific defects and explain whether the selected sales show the same issue.
To check property facts on the county map, follow our CookViewer property comparison walkthrough. Keep assessment values separate from recorded sale prices.
Official sources
Cook County Assessor calendar · Cook County Board of Review appeals
You file directly with Cook County for free. We provide optional research, not representation or guaranteed savings.
Other North Triad townships
Related guides
- Cook County property tax appeal evidence checklist — Organize records, sales comparisons, photos, and submission confirmations with a printable preparation checklist.
- How much could a Cook County property tax appeal save? — Work through an illustrative tax calculation and understand why an assessment reduction is different from a tax saving.
- Wrong square footage on your Cook County assessment? — Verify property measurements, document a record error, and prepare a correction request with an evidence checklist.
- Why are my neighbor’s property taxes lower in Cook County? — Separate assessments from exemptions, compare similar homes, and work through a neighbor comparison before appealing.
- Cook County property tax appeal after buying a home — Assessment higher than your purchase price? Compare the figures, gather closing documents, and check your appeal window.
- How to use CookViewer to compare Cook County properties — Find the official map, compare property facts, and keep assessment figures separate from recorded sale prices.
- Why did my Cook County property tax bill go up? — Work through annual totals, assessment changes, exemptions, and tax rates before choosing your next step.
- How to read your Cook County assessment notice — Understand the numbers, verify your property facts, and turn your notice into an evidence checklist.
- Missed your Cook County property tax appeal deadline? — Find out which window closed, check the other appeal office, and prepare for what comes next.
- Assessor appeal vs Board of Review appeal — Understand the two appeal offices, their separate calendars, and the evidence each reviews.
- How to find comparable sales — Review a hypothetical sales comparison and print a blank research worksheet.
- How to appeal without a lawyer — Gather evidence, check your township window, and file directly with Cook County.
- Cook County property tax exemptions: are you missing one? — Check which exemptions apply, renew automatically, or need annual filing.
- What happens after a Board of Review appeal? — Understand PTAB's role after a Board of Review decision and its filing instructions.
- How to find your Cook County PIN — Find your 14-digit PIN on county records and use it for filings and research.
- Cook County property tax appeal research guide — See how property records and comparable sales can support an assessment appeal.
Guide revision dates describe changes to this guidance. County calendar retrievals are shown separately above; confirm filing dates with the office receiving your appeal.