DuPage County property record for 300 Walnut Ln, Oak Brook, IL 60523
| Property Type | Single Family Home |
|---|---|
| Details | 3,029 sqft · built 1958 |
| Lot Size | 0.61 acres (26,572 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $11,201 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 06-23-203-007 |
| Primary APN | 06-23-203-007 |
|---|
| Stories | 1 Story |
|---|---|
| Building Area | 3,029 sqft Living Area |
| Gross Area | 6,058 sqft |
| 1st Floor Area | 3,029 sqft |
| Basement Area | 3,029 sqft |
| Year Built | Built 1958 |
|---|---|
| Effective Year Built | Effective 1958 |
| Architectural Style | Ranch |
| Exterior Material | Combination |
| Construction Type | Brick |
| Lot Area | 26,572 sqft (0.61 acres) |
| Lot Dimensions | 20 ft deep x 14.1 ft wide |
| Garage Type | Attached |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 300 WALNUT LN |
|---|---|
| City | OAK BROOK |
| State | IL |
| Zip | 60523-1436 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R |
| Legal Description | LAKE DORAN ESTATES |
| Legal Subdivision | LAKE DORAN ESTATES |
| Legal Lot Number | 9 |
| Jurisdiction | DU PAGE IL |
| Township / Civil Division | YORK |
| Census Block Group | 1 |
| Census Block | 1013 |
| Census Tract | 844601 |
300 Walnut Ln is owned and occupied by two individuals.
Source: DuPage County records, as of August 17, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 300 WALNUT LN, OAK BROOK, IL 60523-1436 |
| Occupancy | Owner Occupied |
| 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 | Sep 20, 2026 |
The 2025 property tax bill for 300 Walnut Ln was $11,201 with a veteran's exemption.
Source: DuPage County assessment roll, as of August 17, 2026
| Type | Name |
|---|---|
| State | Illinois |
| County | DuPage County |
| County Subdivision | York Township |
| Municipality | Oak Brook Village |
| Secondary School District | DuPage High School District 88 (09 - 12) |
| Elementary School District | Salt Creek School District 48 (PK - 08) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $11,201.00 | $267,537 Land $157,895 Building $109,642 | $802,611 Land $473,685 Building $328,926 |
| 2022 | $8,948.00 Homeowner's exemption Senior Citizen's exemption | $220,490 Land $130,130 Building $90,360 | $661,470 Land $390,390 Building $271,080 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 300 Walnut Ln in Zone X, an area of minimal flood risk, within 100 ft of a high-risk flood zone.
Source: FEMA National Flood Hazard Layer, effective September 1, 2025 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 21 individual policies |
| Community Rating System | Class 7 (15% premium discount) |
| Nearby Flood Policies | 47 units insured incl. 26 condo units |
| Nearby Flood Claims | 61 (1978–2020) |
| Claims Outside the SFHA | 4 of 61 |
| Most Recent Claim | May 2020 · rainfall accumulation |
| Claims by Event |
|
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 300 Walnut Ln 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 99.1% of the US · lower than 94% 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 | OAK BROOK serves 9,400 people · EPA ID IL0430700 |
|---|---|
| Water Source | Purchased surface water from several systems |
| Last State Inspection | Jun 2024 |
| Lead | Under 1 ppb (2024–2026) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 3 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 218 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
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