La Crosse County property record for 423 Mayfair Pl, Onalaska, WI 54650
| Property Type | Single Family Home |
|---|---|
| Lot Size | 0.45 acres (19,602 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $3,898 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 018-003933-000 |
| Primary APN | 018-003933-000 |
|---|---|
| Alternative APNs |
|
| Lot Area | 19,602 sqft (0.45 acres) |
|---|
| Account Number | 44151 |
|---|---|
| Old Parcel Number | 18 3933 0 |
| Street Address | 423 MAYFAIR PL |
| City | ONALASKA |
| State | WI |
| Zip | 54650-8531 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | FIRST ADDN TO MAYFAIR ADDN LOT 63 EX E 30FT & E 30FT LOT 62 |
| Legal Range | 07 |
| Legal Township | 16 |
| Legal Section | 10 |
| Legal Quarter | NW |
| Quarter-Quarter Section | SW |
| Legal Subdivision | FIRST ADDN TO MAYFAIR ADDN |
| Legal Lot Number | 62-63 |
| Jurisdiction | LA CROSSE WI |
| Township / Civil Division | ONALASKA |
| Census Block Group | 1 |
| Census Block | 1027 |
| Census Tract | 10500 |
423 Mayfair Pl is owned by an individual who acquired it in June 1995.
Source: La Crosse County records, as of February 16, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 482 SYCAMORE ST, ONALASKA, WI 54650-8536 |
| 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 | Name on Deed |
|---|---|
| Last Sale | Jun 27, 1995 |
| Deed Sale | Jun 27, 1995 |
| Deed Document Number | 1135179 |
| Record Updated | Jun 8, 2026 |
The 2025 property tax bill for 423 Mayfair Pl was $3,898.
Source: La Crosse County assessment roll, as of January 1, 2025
| 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 | $3,898.00 | $286,300 Land $46,700 Building $239,600 | $289,600 |
| 2023 | $3,814.00 | $225,900 Land $46,700 Building $179,200 | $225,900 Land $46,700 Building $179,200 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 423 Mayfair Pl in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 3 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 423 Mayfair Pl is low, with 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 80% of the US · above 57% of Wisconsin |
|---|---|
| Wildfire Likelihood | 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 220 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| TDS Telecom Fiber | 8,000 / 8,000 |
| Metronet Fiber | 5,120 / 5,120 |
| Brightspeed Fiber | 2,000 / 2,000 |
| Spectrum Cable · Fiber in parts of the area | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Lynxx Networks.
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