LaSalle County property record for 605 Thompson St, Ottawa, IL 61350
| Property Type | Single Family Home |
|---|---|
| Details | 720 sqft · built 1970 |
| Lot Size | 0.17 acres (7,405 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $2,389 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 22-14-425-001 |
| Primary APN | 22-14-425-001 |
|---|---|
| Alternative APN |
|
| Plumbing Fixtures | 5 Plumbing Fixtures |
|---|---|
| Building Area | 720 sqft Total Area |
| Year Built | Built 1970 |
|---|---|
| Effective Year Built | Effective 1970 |
| Lot Area | 7,405 sqft (0.17 acres) |
| Street Address | 605 THOMPSON ST |
|---|---|
| City | OTTAWA |
| State | IL |
| Zip | 61350-4367 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | COLLEGE HILL SUB OF LTS 4-5-6 & 10 SE1/4 SEC 14-33-3 LT 1 BLK 5 |
| Legal Range | 03 |
| Legal Township | 33 |
| Legal Section | 14 |
| Legal Subdivision | COLLEGE HILL SUB |
| Legal Block | 5 |
| Legal Lot Number | 4-1 |
| Jurisdiction | LASALLE IL |
| Township / Civil Division | SOUTH OTTAWA |
| Census Block Group | 3 |
| Census Block | 3007 |
| Census Tract | 963500 |
605 Thompson St, a single family home, is owned by two individuals.
Source: LaSalle County records, as of October 20, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 1200 ADAMS ST, OTTAWA, IL 61350-4303 |
| 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 |
|---|---|
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 605 Thompson St was $2,389, up 5.7% from the year before.
Source: LaSalle County assessment roll, as of June 29, 2026
| Type | Name |
|---|---|
| State | Illinois |
| County | LaSalle County |
| County Subdivision | South Ottawa Township |
| Municipality | Ottawa City |
| Elementary School District | Ottawa Elementary School District 141 (PK - 08) |
| Secondary School District | Ottawa Township High School District 140 (09 - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $2,389.00 (+5.71%) | $23,727 Land $8,426 Building $15,301 | $71,181 Land $25,278 Building $45,903 |
| 2024 | $2,260.00 | ||
| 2023 | $20,111 (+9.53%) Land $7,142 Building $12,969 | $60,333 (+9.53%) Land $21,426 Building $38,907 | |
| 2022 | $18,362 Land $7,536 Building $10,826 | $55,086 Land $22,608 Building $32,478 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 605 Thompson St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective March 29, 2024 · 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 |
| Community Rating System | Class 2 (40% premium discount) |
| Nearby Flood Policies | 1 in force |
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 605 Thompson St 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 94% of the US · lower than 61% 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 | OTTAWA serves 18,097 people · EPA ID IL0990800 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Jul 2025 |
| Lead | Under 1 ppb (2026–2028) action level 15 ppb |
| Water Quality | Radium resolved · Jul 2023 |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 5 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 527 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Surf Internet Fiber | 1,000 / 1,000 |
| Mediacom Xtream Cable · Fixed Wireless · Fiber in parts of the area | 1,000 / 50 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: AT&T.
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