The 2025 property tax bill for 911 Illinois Ave was $4,890, up 7.5% from the year before.
Source: LaSalle County assessment roll, as of June 29, 2026
Property Jurisdictions
Type
Name
State
Illinois
County
LaSalle County
County Subdivision
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)
Tax Bill & Assessment History
Year
Tax Bill
Assessed Value
Assessed Market Value
2025
$4,890.00 (+7.5%)
$48,754 (+10.36%)Land $9,243Building $39,511
$146,262 (+10.36%)Land $27,729Building $118,533
2024
$4,549.00
$44,177 (+11.73%)Land $8,375Building $35,802
$132,531 (+11.73%)Land $25,125Building $107,406
2023
$39,539 (+10.18%)Land $7,496Building $32,043
$118,617 (+10.18%)Land $22,488Building $96,129
2022
$35,885Land $11,311Building $24,574
$107,655Land $33,933Building $73,722
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.
Flood
FEMA maps place 911 Illinois Ave in Zone X, an area of minimal flood risk, though there have been 4 flood claims nearby since 1984.
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
2 in force
Nearby Flood Claims
4 (1984–2020)
Claims Outside the SFHA
2 of 4
Most Recent Claim
May 2020 · rainfall accumulation
Claims by Event
Severe Storms, Straight-line Winds, And Flooding, Apr 2013 · 2 claims
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
The area around 911 Illinois Ave has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
Wildfire Risk
Not rated no burnable land within ember reach
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Drinking Water
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
Violations Reported to EPA
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.
Internet Providers
Source: FCC Broadband Data Collection, based on 319 locations within half a mile, as of December 31, 2025
Provider
Max Down / Up (Mbps)
Mediacom Xtream Cable · Fixed Wireless · Fiber in parts of the area