Winnebago County property record for 1639 Knapp St, Oshkosh, WI 54902
| Property Type | Duplex |
|---|---|
| Details | 6 bd · 2 ba · 3,709 sqft · built 1883 |
| Lot Size | 3.68 acres (160,718 sqft) |
| Owner | Company Name on File |
| Last Sale | $255,000 (Feb 2024) |
| Tax Bill | $5,487 (2024) |
| Deeds & Mortgages | Feb 2024 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 13-07180000 |
| Primary APN | 13-07180000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 6 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 13 Rooms |
| Units | 2 Units |
| Stories | 2 Stories |
| Building Area | 3,709 sqft Living Area |
| Family Room | Family Room |
| Year Built | Built 1883 |
|---|---|
| Effective Year Built | Effective 1883 |
| Architectural Style | Duplex Single |
| Exterior Material | Stone |
| Lot Area | 160,718 sqft |
| Lot Dimensions | 493 ft deep x 326 ft wide |
| Garage Type | Detached |
| Garage Area | 1,088 sqft |
| Heating System | HVAC |
|---|---|
| Heating Fuel | Oil |
| Account Number | 913-07180000 |
|---|---|
| Street Address | 1639 KNAPP ST |
| City | OSHKOSH |
| State | WI |
| Zip | 54902-6607 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | R1 |
| Legal Description | LOT 4 FARMING LAND NE1/4 SE1/4 SEC 27 |
| Legal Subdivision | SUBDIVISION |
| Legal Lot Number | 4 |
| Jurisdiction | WINNEBAGO WI |
| Township / Civil Division | OSHKOSH |
| Census Block Group | 3 |
| Census Block | 3000 |
| Census Tract | 1400 |
1639 Knapp St, a duplex, is owned by a company that bought it in February 2024.
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 | Company Name on File |
|---|---|
| Mailing Address | 4165 TWILIGHT CT, OSHKOSH, WI 54904-6923 |
| Owner Type | Company |
| Vesting | Limited Liability Partnership |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Feb 2, 2024 · Amount on File |
| Deed Sale | Feb 2, 2024 · Amount on File |
| Prior Sale | May 2, 2006 · Amount on File |
| Deed Document Number | 20241917435 |
| Record Updated | Oct 29, 2026 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | WINNEBAGO WI |
| Recording Date | Feb 2, 2024 |
| Property Address | 1639 KNAPP ST, OSHKOSH, WI 54902-6607 |
| Document Number | 0001917435 |
| Instrument Date | Feb 2, 2024 |
| Instrument | 1917435 |
| Transaction Type | Transfer |
| Record Updated | Feb 22, 2024 |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $765.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 4165 TWILIGHT CT, OSHKOSH, WI 54904-6923 |
| Document Number | 0001917436 |
|---|---|
| Date | Feb 2, 2024 |
| Instrument | 1917436 |
| Name | FORTIFI BANK |
|---|---|
| Type | Bank |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount on Record |
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 | $290,200 (-) Land $90,300 Building $199,900 | ||
| 2024 | $5,487.00 (-0.87%) | $290,200 (+49.9%) Land $90,300 Building $199,900 | |
| 2023 | $5,535.00 (+0.31%) Homeowner's exemption | $193,600 (-) Land $69,500 Building $124,100 | $279,756 Land $100,429 Building $179,327 |
| 2022 | $5,518.00 Homeowner's exemption | $193,600 Land $69,500 Building $124,100 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 1639 Knapp St in Zone X, an area of minimal flood risk.
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.
Wildfire risk around 1639 Knapp 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 98% of the US · lower than 94% 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 | 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 474 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 |
| Bertram Communications Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
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