421 N Main St, Oshkosh, WI 54901 Property Records

Winnebago County property record for 421 N Main St, Oshkosh, WI 54901

Property Summary

Property Type	Commercial
Details	5,204 sqft · built 1875
Lot Size	0.061 acres (2,660 sqft)
Owner	Company Name on File
Last Sale	$84,000 (May 2005)
Tax Bill	$10,253 (2024)
Flood Zone	Zone X (minimal risk)
APN	`07-00080000`

Property Details

APN / Parcel Number

Primary APN	`07-00080000`
Alternative APN	`907-00080000`

Interior

Units	4 Units
Building Area	5,204 sqft Total Area

Exterior

Year Built	Built 1875
Effective Year Built	Effective 1980
Architectural Style	Duplex Single
Lot Area	2,660 sqft (0.061 acres)

Location & Zoning

Account Number	907-00080000
Street Address	421 N MAIN ST
City	OSHKOSH
State	WI
Zip	54901-4907
Property Category	Commercial
Property Type	Commercial > Retail
Local Zoning Code	C3
Legal Description	N 10 FT OF LOT 9 ALSO LOT 2 BLK 44 LEACHS MAP COTTRILLS SUBDAS PER LEACHS MAP OF 1894
Legal Subdivision	COTTRILLS SUBDIVISION
Legal Block	44
Legal Lot Number	9,2
Jurisdiction	WINNEBAGO WI
Township / Civil Division	OSHKOSH
Census Block Group	2
Census Block	2003
Census Tract	501

Owner

Source: Winnebago County records · APN 07-00080000

Assessment roll updated May 27, 2026 · Last verified June 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 File
Mailing Address	PO BOX 1099, OSHKOSH, WI 54903-1099
Owner Type	Company
Vesting	Company

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	May 20, 2005 · Amount on Record
Deed Sale	May 20, 2005 · Amount on Record
Deed Document Number	20051355600
Record Updated	Sep 20, 2026

Tax Assessment & Valuation

Source: Winnebago County records · Assessment roll updated May 27, 2026 · Last verified June 2026

Property Jurisdictions

Type	Name
State	Wisconsin
County	Winnebago County
Municipality	Oshkosh City
Unified School District	Oshkosh Area School District (PK - 12)

Tax Bill & Assessment History

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Year	Tax Bill	Assessed Value	Assessed Market Value
2025		$448,400 (+23.15%) Land $14,000 Building $434,400
2024	$10,253.00 (-19.94%)
2023	$12,806.00 (+2.83%)	$364,100 (-) Land $13,300 Building $350,800	$526,133 Land $19,219 Building $506,914
2022	$12,453.00	$364,100 Land $13,300 Building $350,800

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of March 26, 2019 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	3 in force

Wildfire

Wildfire Risk	Not rated no burnable land within ember reach

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.

Historic Designation

Source: NPS National Register of Historic Places as of August 1, 2026 · Last verified October 2026

Historic District	Within the North Main Street Historic District listed 1996 · 61 contributing resources · NRIS 96000250

Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

Provider	Max Down / Up (Mbps)
Spectrum Cable · Fiber in parts of the area	1,000 / 1,000
Verizon Fixed Wireless	300 / 20
Bertram Communications Fixed Wireless	100 / 20
AT&T Fixed Wireless · Fiber in parts of the area	100 / 20

Based on FCC filings for 117 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	OSHKOSH WATERWORKS serves 63,000 people
Water Source	Surface water
Last State Inspection	Apr 2025
Lead	6 ppb (2025) action level 15 ppb

Violations Reported to EPA

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 as reported to EPA, 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. The full violation and enforcement history is in the system's EPA record.