Walworth County property record for 446 Observatory Pl, Williams Bay, WI 53191
| Property Type | Single Family Home |
|---|---|
| Lot Size | 0.441 acres (19,210 sqft) |
| Owner | 2 Individual Names on Record |
| Tax Bill | $2,506 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | WOB 00024B |
| Primary APN | WOB 00024B |
|---|
| Lot Area | 19,210 sqft (0.441 acres) |
|---|
| Old Parcel Number | WOB00024B |
|---|---|
| Street Address | 446 OBSERVATORY PL |
| City | WILLIAMS BAY |
| State | WI |
| Zip | 53191-9517 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | S 1/2 LOT 13 OBSERVATORY SUBD VILLAGE OF WILLIAMS BAY |
| Legal Subdivision | OBSERVATORY SUB |
| Legal Lot Number | 13 |
| Jurisdiction | WALWORTH WI |
| Township / Civil Division | WILLIAMS BAY |
| Census Block Group | 2 |
| Census Block | 2015 |
| Census Tract | 1603 |
Source: Walworth County records, as of February 9, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Co-owner | Co-owner on Record |
| Mailing Address | 446 OBSERVATORY PL, WILLIAMS BAY, WI 53191-9517 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Record Updated | Jun 8, 2026 |
Source: Walworth County assessment roll, as of January 1, 2025
| Type | Name |
|---|---|
| State | Wisconsin |
| County | Walworth County |
| Municipality | Williams Bay Village |
| Unified School District | Williams Bay School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $2,506.00 (-20.49%) Homeowner's exemption | $308,800 (+9.89%) Land $120,800 Building $188,000 | $304,740 (+9.24%) Land $119,212 Building $185,528 |
| 2023 | $3,152.00 (-7.67%) Homeowner's exemption | $281,000 (-) Land $93,000 Building $188,000 | |
| 2022 | $3,414.00 Homeowner's exemption | $281,000 Land $93,000 Building $188,000 | $278,969 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
Source: FEMA National Flood Hazard Layer, effective March 2, 2023
| 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 97% of the US · lower than 92% 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 | WILLIAMS BAY WATERWORKS serves 2,601 people · EPA ID WI2650060 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Mar 2024 |
| Lead | 45 ppb (2026) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | Lead public education Jul 2025 |
| Monitoring and Reporting | 10 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 282 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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