Cook County property record for 21801 Kostner Ave, Matteson, IL 60443
| Property Type | Exempt (Full or Partial) |
|---|---|
| Lot Size | 15.6 acres (683,304 sqft) |
| Owner | Company Name on File |
| Flood Zone | Zone AE (high risk) |
| APN | 31-27-200-008 |
| Primary APN | 31-27-200-008 |
|---|---|
| Alternative APN |
|
| Lot Area | 683,304 sqft |
|---|
| Street Address | 21801 KOSTNER AVE |
|---|---|
| City | MATTESON |
| State | IL |
| Zip | 60443 |
| Property Category | Other |
| Property Type | Other > Exempt (Full or Partial) |
| Jurisdiction | COOK IL |
| Township / Civil Division | RICH |
| Census Block Group | 1 |
| Census Block | 1035 |
| Census Tract | 830006 |
21801 Kostner Ave is owned by a company.
Source: Cook County records, as of May 27, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 4900 VILLAGE CMNS, MATTESON, IL 60443-2666 |
| Owner Type | Company |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | Name on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
Source: Cook County assessment roll, as of May 27, 2026
| Type | Name |
|---|---|
| State | Illinois |
| County | Cook County |
| County Subdivision | Rich Township |
| Municipality | Matteson Village |
| Elementary School District | Matteson Elementary School District 162 (PK - 08) |
| Secondary School District | Rich Township High School District 227 (09 - 12) |
| Year | Tax Bill |
|---|---|
| 2022 | Additional exemption filed |
FEMA maps place 21801 Kostner Ave in Zone AE, a high-risk flood area; flood insurance is required for federally backed loans.
Source: FEMA National Flood Hazard Layer, effective February 11, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone AE high risk |
|---|---|
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | Varies along the reach; see FIRM |
| Flood Insurance Requirement | Required federally backed loans |
| Flood Insurance Cost | Premium on File median of 20 policies |
| Nearby Flood Policies | 20 in force |
| Nearby Flood Claims | 4 (1982–2019) |
| Most Recent Claim | Jun 2019 · river or lake flooding |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Wildfire risk around 21801 Kostner Ave is moderate, ranking above 40% of the US, with a 0.04% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 40% of the US · above 99.7% of Illinois |
|---|---|
| Wildfire Likelihood | 0.04% annual chance |
| Exposure | None beyond ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: FCC Broadband Data Collection, based on 148 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| AT&T Fixed Wireless · DSL | 100 / 20 |
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