Jefferson County property record for 4203 Williamson Pl, Mount Vernon, IL 62864
| Property Type | Commercial |
|---|---|
| Lot Size | 0.28 acres (12,197 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $360,000 (Apr 2015) |
| Tax Bill | $6,980 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 06-35-427-020 |
| Primary APN | 06-35-427-020 |
|---|
| Lot Area | 12,197 sqft (0.28 acres) |
|---|
| Street Address | 4203 WILLIAMSON PL |
|---|---|
| City | MOUNT VERNON |
| State | IL |
| Zip | 62864-6740 |
| Property Category | Commercial |
| Property Type | Commercial > Retail |
| Legal Description | WESTLAND BUSINESS CENTER-RESUB LTS 1,2 & 3 LOT 2 |
| Legal Subdivision | WESTLAND BUSINESS CENTER-RESUB |
| Legal Lot Number | 1-3 |
| Jurisdiction | JEFFERSON IL |
| Township / Civil Division | SHILOH |
| Census Block Group | 3 |
| Census Block | 3010 |
| Census Tract | 50500 |
4203 Williamson Pl, a commercial property, is owned by two individuals who bought it in April 2015.
Source: Jefferson County records, as of October 20, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 4203 WILLIAMSON PL, MOUNT VERNON, IL 62864-6740 |
| Owner Type | Individual |
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 | 2 Names on Deed |
|---|---|
| Last Sale | Apr 22, 2015 · Amount on File |
| Deed Sale | Apr 22, 2015 · Amount on File |
| Deed Document Number | 20151643 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 4203 Williamson Pl was $6,980, up 1% from the year before.
Source: Jefferson County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | Illinois |
| County | Jefferson County |
| County Subdivision | Shiloh Township |
| Municipality | Mount Vernon City |
| Elementary School District | Mount Vernon School District 80 (PK - 08) |
| Secondary School District | Mount Vernon Township High School District 201 (09 - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $6,980.00 (+1.01%) | $89,969 Land $9,585 Building $80,384 | $269,907 Land $28,755 Building $241,152 |
| 2024 | $6,910.00 | ||
| 2022 | $80,428 Land $15,730 Building $64,698 | $241,284 Land $47,190 Building $194,094 | |
| 2021 | $7,357.00 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
FEMA maps place 4203 Williamson Pl in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective September 17, 2010
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Wildfire risk around 4203 Williamson Pl is low, with less than a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 96% of the US · lower than 74% of Illinois |
|---|---|
| Wildfire Likelihood | Under 0.01% 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: EPA Safe Drinking Water Information System, as of September 2026
| Water System | MOUNT VERNON serves 15,793 people · EPA ID IL0810300 |
|---|---|
| Water Source | Purchased surface water from REND LAKE INTER-CITY WATER SYSTEM |
| Last State Inspection | Sep 2023 |
| Lead | Under 1 ppb (2025) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 2 last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes. The service area is an EPA estimate; the actual supplier may differ.
Source: FCC Broadband Data Collection, based on 39 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable | 1,000 / 1,000 |
| Wisper ISP Fixed Wireless | 400 / 30 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: ClearWave, GigFire, T-Mobile, Verizon.
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