Winnebago County property record for 423 W 9th Ave, Oshkosh, WI 54902
| Property Type | Duplex |
|---|---|
| Details | 4 bd · 2 ba · 1,496 sqft · built 1866 |
| Lot Size | 0.172 acres (7,500 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $20,000 (Mar 2018) |
| Tax Bill | $3,012 (2024) |
| Flood Zone | Zone X (minimal risk) |
| APN | 09-06140000 |
| Primary APN | 09-06140000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 9 Rooms |
| Units | 2 Units |
| Stories | 1 Story |
| Building Area | 1,496 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1866 |
|---|---|
| Effective Year Built | Effective 1866 |
| Architectural Style | Duplex Single |
| Exterior Material | Aluminum/Vinyl |
| Lot Area | 7,500 sqft (0.172 acres) |
| Lot Dimensions | 150 ft deep x 50 ft wide |
| Garage Type | Detached |
| Garage Area | 200 sqft |
| Heating System | HVAC |
|---|---|
| Heating Fuel | Gas |
| Account Number | 909-06140000 |
|---|---|
| Street Address | 423 W 9TH AVE |
| City | OSHKOSH |
| State | WI |
| Zip | 54902-6466 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | R2 |
| Legal Description | LOT 8 BLK 83 PLAT OF ORIGINAL 3RD WARD |
| Legal Subdivision | ORIGINAL THIRD WARD |
| Legal Block | 83 |
| Legal Lot Number | 8 |
| Jurisdiction | WINNEBAGO WI |
| Township / Civil Division | OSHKOSH |
| Census Block Group | 1 |
| Census Block | 1001 |
| Census Tract | 1300 |
423 W 9th Ave, a duplex, is owned and occupied by two individuals who bought it in March 2018.
Source: Winnebago County records, as of May 27, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 423 W 9TH AVE, OSHKOSH, WI 54902-6466 |
| 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 | 2 Names on Deed |
|---|---|
| Last Sale | Mar 15, 2018 · Amount on File |
| Deed Sale | Mar 15, 2018 · Amount on File |
| Prior Sale | Dec 21, 2016 · Amount on File |
| Deed Document Number | 20181761933 |
| Record Updated | Oct 29, 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 | $161,200 Land $20,200 Building $141,000 | ||
| 2024 | $3,012.00 (+23.24%) | ||
| 2023 | $2,444.00 (+1.08%) Homeowner's exemption | $83,700 (-) Land $12,600 Building $71,100 | $120,948 Land $18,207 Building $102,741 |
| 2022 | $2,418.00 Homeowner's exemption | $83,700 Land $12,600 Building $71,100 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 423 W 9th Ave in Zone X, an area of minimal flood risk, though there have been 8 flood claims nearby since 2008.
Source: FEMA National Flood Hazard Layer, effective March 26, 2019 · 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 Policies | 2 in force |
| Nearby Flood Claims | 8 (2008–2021) |
| Claims Outside the SFHA | 8 of 8 |
| Most Recent Claim | Jul 2021 · rainfall accumulation |
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.
The area around 423 W 9th Ave has no burnable land within ember reach, so its wildfire risk is not rated.
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 744 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Spectrum Cable | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| Bertram Communications Fixed Wireless | 100 / 20 |
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