Will County property record for 421 Thornton St, Lockport, IL 60441
| Property Type | Single Family Home |
|---|---|
| Details | 1 ba · 1,539 sqft · built 1909 |
| Lot Size | 0.32 acres (14,023 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $161,500 (Nov 2003) |
| Tax Bill | $4,870 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 11-04-23-221-005 |
| Primary APN | 11-04-23-221-005 |
|---|---|
| Alternative APN |
|
| Full Baths | 1 Bath |
|---|---|
| Stories | 1 Story |
| Building Area | 1,539 sqft Living Area |
| Basement Area | 1,539 sqft |
| Unfinished Basement | 1,539 sqft |
| Year Built | Built 1909 |
|---|---|
| Effective Year Built | Effective 1909 |
| Lot Area | 14,023 sqft (0.32 acres) |
| Garage Type | Detached |
| Garage Area | 1,800 sqft |
| Street Address | 421 THORNTON ST |
|---|---|
| City | LOCKPORT |
| State | IL |
| Zip | 60441-2956 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOTS 1 2 (EX E'LY 90 FT THRF) IN LOCKPORT PROPER, BEING A SUB OF PRT OF THE W1/2 OF THE NE1/4 OF SEC 23, T36N-R10E. |
| Legal Range | 10E |
| Legal Township | 36N |
| Legal Section | 23 |
| Legal Subdivision | LOCKPORT PROPER |
| Legal Lot Number | 1,2 |
| Jurisdiction | WILL IL |
| Township / Civil Division | LOCKPORT |
| Census Block Group | 2 |
| Census Block | 2008 |
| Census Tract | 880602 |
Source: Will County records, as of October 20, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on Record |
|---|---|
| Mailing Address | 421 THORNTON ST, LOCKPORT, IL 60441-2956 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Nov 5, 2003 · Amount on Record |
| Deed Sale | Nov 5, 2003 · Amount on Record |
| Prior Sale | May 6, 1999 · Amount on Record |
| Deed Document Number | 2003277656 |
| Record Updated | Oct 29, 2026 |
Source: Will County assessment roll, as of August 24, 2026
| Type | Name |
|---|---|
| State | Illinois |
| County | Will County |
| County Subdivision | Lockport Township |
| Municipality | Lockport City |
| Elementary School District | Lockport School District 91 (KG - 08) |
| Secondary School District | Lockport Township High School District 205 (09 - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $4,870.00 (+1.5%) | $74,407 (+7.2%) Land $25,035 Building $49,372 | $223,221 (+7.2%) Land $75,105 Building $148,116 |
| 2024 | $69,410 (+19.41%) Land $23,354 Building $46,056 | $208,230 (+19.41%) Land $70,062 Building $138,168 | |
| 2022 | $4,798.00 Homeowner's exemption | $58,127 Land $19,558 Building $38,569 | $174,381 Land $58,674 Building $115,707 |
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.
Source: FEMA National Flood Hazard Layer, effective June 11, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Claims | 1 (1996) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Jul 1996 · 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 95% of the US · lower than 70% of Illinois |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | Direct burnable vegetation |
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 | LOCKPORT serves 23,100 people · EPA ID IL1970500 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | May 2025 |
| Lead | 8 ppb (2026) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 40 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.
Source: FCC Broadband Data Collection, based on 468 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
May also be available: Verizon.
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