Winnebago County property record for 421 Congress Ave, Oshkosh, WI 54901
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,677 sqft · built 1906 |
| Lot Size | 0.146 acres (6,350 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $165,500 (Oct 2020) |
| Tax Bill | $3,965 (2024) |
| Flood Zone | Zone X (minimal risk) |
| APN | 12-08420000 |
| Primary APN | 12-08420000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 7 Rooms |
| Stories | 2 Stories |
| Building Area | 1,677 sqft Living Area |
| Family Room | Family Room |
| Year Built | Built 1906 |
|---|---|
| Effective Year Built | Effective 1906 |
| Exterior Material | Other |
| Lot Area | 6,350 sqft (0.146 acres) |
| Lot Dimensions | 127 ft deep x 50 ft wide |
| Garage Type | Detached |
| Garage Area | 280 sqft |
| Cooling System | HVAC |
|---|---|
| Heating System | HVAC |
| Account Number | 912-08420000 |
|---|---|
| Street Address | 421 CONGRESS AVE |
| City | OSHKOSH |
| State | WI |
| Zip | 54901-2967 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R2 |
| Legal Description | LOT 7 BLK 2 MASTERSONS PARK PLAT |
| Legal Subdivision | BLK 2 MASTERSONS PARK PLAT |
| Legal Block | 2 |
| Legal Lot Number | 7 |
| Jurisdiction | WINNEBAGO WI |
| Township / Civil Division | OSHKOSH |
| Census Block Group | 3 |
| Census Block | 3000 |
| Census Tract | 800 |
Source: Winnebago County records, as of May 27, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 421 CONGRESS AVE, OSHKOSH, WI 54901-2967 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Right of Survivorship |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Oct 20, 2020 · Amount on Record |
| Deed Sale | Oct 20, 2020 · Amount on Record |
| Deed Document Number | 20201832016 |
| Record Updated | Sep 20, 2026 |
Source: Winnebago County assessment roll, as of May 27, 2026
| Type | Name |
|---|---|
| State | Wisconsin |
| County | Winnebago County |
| Municipality | Oshkosh City |
| Unified School District | Oshkosh Area School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $223,800 (+63.84%) Land $22,200 Building $201,600 | ||
| 2024 | $3,965.00 (+6.73%) | ||
| 2023 | $3,715.00 (+0.08%) Homeowner's exemption | $136,600 (-) Land $16,500 Building $120,100 | $197,390 Land $23,843 Building $173,547 |
| 2022 | $3,712.00 Homeowner's exemption | $136,600 Land $16,500 Building $120,100 |
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 26, 2019
| 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 | Not rated no burnable land within 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 | OSHKOSH WATERWORKS serves 63,000 people · EPA ID WI4710457 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Apr 2025 |
| Lead | 6 ppb (2025) 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. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 626 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| TDS Telecom Fiber | 8,000 / 8,000 |
| AT&T Fiber · DSL in parts of the area | 5,000 / 5,000 |
| Spectrum Cable | 1,000 / 1,000 |
| Bertram Communications Fixed Wireless | 100 / 20 |
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