Winnebago County property record for 321 Mason St, Oshkosh, WI 54902
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 1,008 sqft · built 1959 |
| Lot Size | 0.223 acres (9,730 sqft) |
| Owner | Company Name on Record |
| Last Sale | $180,000 (Dec 2024) |
| Tax Bill | $3,458 (2025) |
| Deeds & Mortgages | Dec 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 06-10270000 |
| Primary APN | 06-10270000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 1,008 sqft Living Area |
| 1st Floor Area | 1,008 sqft |
| Year Built | Built 1959 |
|---|---|
| Effective Year Built | Effective 1959 |
| Architectural Style | Ranch |
| Exterior Material | Aluminum/Vinyl |
| Lot Area | 9,730 sqft (0.223 acres) |
| Lot Dimensions | 139 ft deep x 70 ft wide |
| Garage Type | Detached |
| Garage Area | 308 sqft |
| Cooling System | HVAC |
|---|---|
| Heating System | HVAC |
| Account Number | 906-10270000 |
|---|---|
| Street Address | 321 MASON ST |
| City | OSHKOSH |
| State | WI |
| Zip | 54902-5640 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Description | LOT 9 BLK 2 VANDERPOOLS 2ND ADDN |
| Legal Subdivision | BLK 2 VANDERPOOLS 2ND ADDN |
| Legal Block | 2 |
| Legal Lot Number | 9 |
| Jurisdiction | WINNEBAGO WI |
| Township / Civil Division | OSHKOSH |
| Census Block Group | 3 |
| Census Block | 3009 |
| Census Tract | 1100 |
Source: Winnebago County records, as of July 22, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 1990 S WESTHAVEN DR, OSHKOSH, WI 54904-8330 |
| Owner Type | Company |
| Vesting | Limited Liability Partnership |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Dec 5, 2024 · Amount on Record |
| Deed Sale | Dec 5, 2024 · Amount on Record |
| Deed Document Number | 20241935435 |
| Prior Transfer Date | Jul 31, 2007 |
| Prior Transfer Doc | 0001459847 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | WINNEBAGO WI |
| Property Address | 321 MASON ST, OSHKOSH, WI 54902-5640 |
| Transaction Type | Mortgage |
| Record Updated | Jun 26, 2023 |
| Name | Verified Name |
|---|---|
| Address | 321 MASON ST, OSHKOSH, WI 54902-5640 |
| Document Number | 0001871974 |
|---|---|
| Date | Dec 28, 2021 |
| Instrument | 1871974 |
| Name | NATIONSTAR MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Address | MADISON HEIGHTS, MI 48071 |
| Type | FHA Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Dec 1, 2051 |
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 | $3,458.00 (-34%) | $192,400 (-) Land $31,100 Building $161,300 | |
| 2024 | $5,239.00 (+13.57%) | $192,400 (+78.15%) Land $31,100 Building $161,300 | |
| 2023 | $4,613.00 (+7.86%) Homeowner's exemption | $108,000 (-) Land $21,400 Building $86,600 | $156,062 Land $30,923 Building $125,139 |
| 2022 | $4,277.00 Homeowner's exemption | $108,000 Land $21,400 Building $86,600 |
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 · 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 | 1 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.
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 415 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Spectrum Cable | 1,000 / 1,000 |
| Bertram Communications Fixed Wireless | 100 / 20 |
May also be available: T-Mobile, Verizon.
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