La Crosse County property record for 309 4th Ave S, Onalaska, WI 54650
| Property Type | Single Family Home |
|---|---|
| Lot Size | 0.15 acres (6,534 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $2,791 (2025) |
| Deeds & Mortgages | Nov 2025 Transfer Oct 2025 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 018-000197-000 |
| Primary APN | 018-000197-000 |
|---|---|
| Alternative APNs |
|
| Lot Area | 6,534 sqft (0.15 acres) |
|---|---|
| Lot Dimensions | 131 ft deep x 50 ft wide |
| Account Number | 40283 |
|---|---|
| Street Address | 309 4TH AVE S |
| City | ONALASKA |
| State | WI |
| Zip | 54650-2923 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | MZA |
| Legal Description | ORIGINAL TOWN OF ONALASKA S 7FT LOT 2 & N 43FT LOT 3 BLOCK 26 & W 10FT VAC ALLEY ADJ ON E |
| Legal Range | 07W |
| Legal Township | 16N |
| Legal Section | 08 |
| Legal Subdivision | ORIGINAL TOWN OF ONALASKA |
| Legal Block | 26 |
| Legal Lot Number | 2-3 |
| Jurisdiction | LA CROSSE WI |
| Township / Civil Division | ONALASKA |
| Census Block Group | 4 |
| Census Block | 4009 |
| Census Tract | 10500 |
309 4th Ave S is owned and occupied by two individuals who acquired it in October 2025.
Source: La Crosse County records, as of March 11, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 309 4TH AVE S, ONALASKA, WI 54650-2923 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Life Estate |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Nov 12, 2025 | Intrafamily Transfer, Transfer |
| Oct 21, 2025 | Quit Claim Deed, Transfer Quitclaim |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Oct 16, 2025 |
| Transfer Doc | 0001840204 |
| Record Updated | Sep 20, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | LA CROSSE WI |
| Recording Date | Nov 12, 2025 |
| Property Address | 309 4TH AVE S, ONALASKA, WI 54650-2923 |
| Document Number | 0001841135 |
| Map Reference | DOC 1840204 |
| Instrument Date | Nov 6, 2025 |
| Instrument | 1841135 |
| Transaction Type | Transfer |
| Record Updated | Jan 19, 2026 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | LA CROSSE WI |
| Recording Date | Oct 21, 2025 |
| Property Address | 309 4TH AVE S, ONALASKA, WI 54650-2923 |
| Document Number | 0001840204 |
| Instrument Date | Oct 16, 2025 |
| Instrument | 1840204 |
| Transaction Type | Transfer |
| Record Updated | Jan 19, 2026 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|
The 2025 property tax bill for 309 4th Ave S was $2,791, up 10.1% from the year before.
Source: La Crosse County assessment roll, as of March 11, 2026
| Type | Name |
|---|---|
| State | Wisconsin |
| County | La Crosse County |
| Municipality | Onalaska City |
| Unified School District | Onalaska School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $2,791.00 (+10.1%) Homeowner's exemption | $222,200 (+34.83%) Land $45,700 Building $176,500 | $224,700 (+11.74%) |
| 2024 | $2,535.00 (-8.88%) Homeowner's exemption | $164,800 (-) Land $32,700 Building $132,100 | $201,100 (+22.03%) |
| 2023 | $2,782.00 Homeowner's exemption | $164,800 Land $32,700 Building $132,100 | $164,800 Land $32,700 Building $132,100 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 309 4th Ave S in Zone X, an area of minimal flood risk, though there have been 3 flood claims nearby since 1997.
Source: FEMA National Flood Hazard Layer, effective February 3, 2023 · 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 | 3 (1997–2004) |
| Most Recent Claim | Aug 2004 · 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.
Wildfire risk around 309 4th Ave S 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 95% of the US · lower than 88% of Wisconsin |
|---|---|
| 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 | ONALASKA WATERWORKS serves 18,000 people · EPA ID WI6320327 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Dec 2023 |
| Lead | Under 1 ppb (2023) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None 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 243 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| TDS Telecom Fiber | 8,000 / 8,000 |
| Brightspeed Fiber | 2,000 / 2,000 |
| Spectrum Cable · Fiber in parts of the area | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| Starlink Satellite | 280 / 30 |
| T-Mobile Fixed Wireless | 100 / 20 |
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