Waukesha County property record for 531 E Union St, Oconomowoc, WI 53066
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 1,020 sqft |
| Lot Size | 0.21 acres (9,148 sqft) |
| Owner | Individual Name on File |
| Last Sale | $134,900 (Jul 2001) |
| Tax Bill | $2,577 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | OCOC-0590-049 |
| Primary APN | OCOC-0590-049 |
|---|
| Lot Area | 9,148 sqft (0.21 acres) |
|---|
| Street Address | 531 E UNION ST |
|---|---|
| City | OCONOMOWOC |
| State | WI |
| Zip | 53066-3845 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 10 WOODS BLOCK UNION ADDITION TO THE VILLAGE OF OCONOMOWOC PT S1/2 SEC 33 T8N R17E & PT N1/2 SEC 4 T7N R17E DOC# 2677950 |
| Legal Range | 17E |
| Legal Township | 8N |
| Legal Section | 33 |
| Legal Subdivision | UNION ADDITION TO THE VILLAGE OF OCONOMO |
| Legal Block | WOODS |
| Legal Lot Number | 10 |
| Jurisdiction | WAUKESHA WI |
| Township / Civil Division | OCONOMOWOC |
| Census Block Group | 3 |
| Census Block | 3004 |
| Census Tract | 204302 |
531 E Union St is owned and occupied by an individual who bought it in July 2001.
Source: Waukesha County records, as of June 23, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 531 E UNION ST, OCONOMOWOC, WI 53066-3845 |
| 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 | Name on Deed |
|---|---|
| Last Sale | Jul 19, 2001 · Amount on File |
| Deed Sale | Jul 19, 2001 · Amount on File |
| Deed Document Number | 20012677950 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 531 E Union St was $2,577.
Source: Waukesha County assessment roll, as of June 23, 2026
| Type | Name |
|---|---|
| State | Wisconsin |
| County | Waukesha County |
| Municipality | Oconomowoc City |
| Unified School District | Oconomowoc Area School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $2,577.00 | $248,900 Land $80,700 Building $168,200 | $252,600 |
| 2023 | $2,282.00 Homeowner's exemption | $206,300 Land $80,700 Building $125,600 | $215,300 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 531 E Union St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective October 19, 2025
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Wildfire risk around 531 E Union 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 99.1% of the US · lower than 97.9% 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 | OCONOMOWOC WATERWORKS serves 15,805 people · EPA ID WI2680227 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Apr 2025 |
| Lead | 7 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 225 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable · Fiber in parts of the area | 1,000 / 50 |
| Verizon Fixed Wireless | 300 / 20 |
| Bertram Communications Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber in parts of the area | 100 / 20 |
May also be available: Netwurx, T-Mobile.
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