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Single Family ResidenceResidential
$244,984$164 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 92How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026

121 W 21ST AVE

OSHKOSH, WI 54902
3
Beds
1
Baths
1,494 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
0.28 ac
Lot SizeThe size of the land the home sits on, from county records.
1948
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$245K
$224K low$266K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,948 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$175,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$36,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$139,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$175,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$180,093

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Cape Cod
CountyWinnebago
Lot (acres)The size of the land the home sits on, from county records.0.28
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning in the home.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Jefferson Elementary SchoolD
Elementary · Grades KG–5 · 1.0 mi
M
South Park Middle SchoolC-
Middle · Grades 6–8 · 1.1 mi
H
Oshkosh West High SchoolA-
High · Grades 9–12 · 2.6 mi

District: Oshkosh Area School District

Neighborhood · ZIP 54902These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.122
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.71
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.13

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.19%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.12%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.22,899
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.366 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$67,939
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$76,774
Average tempThe average temperature here across a full year.45°F
Annual precipHow much rain and melted snow falls here in a typical year.31 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.54%

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Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

121 W 21st Ave measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Worth less than 66% of homes in Winnebago County
  • Costs less per square foot than 68% of homes in Winnebago County
  • Has a bigger lot than 71% of homes in Oshkosh 54902

What homes are worth in Oshkosh 54902

Each bar is how many homes fall in that price range. The marker is this home.

This home
$138K$714K

This home is worth more than 48% of homes in Oshkosh 54902.

How it measures up in Oshkosh 54902

The dot is this home. The mark in the middle is the typical home in Oshkosh 54902.

Estimated value$244,984
CheaperTypical $248,226Pricier

Pricier than 48% of homes nearby

Price per ft²$164
CheaperTypical $186Pricier

Pricier than 34% of homes nearby

Living area1,494 ft²
SmallerTypical 1,370 ft²Bigger

Bigger than 61% of homes nearby

Lot size0.28 ac
SmallerTypical 0.19 acBigger

Bigger than 71% of homes nearby

Year built1948
OlderTypical 1946Newer

Newer than 51% of homes nearby

How 121 W 21st Ave ranks against every home in each area.
MeasureThis homeOshkosh 54902Winnebago County
Estimated valuepricier than$244,98448% of homes34% of homes
Price per ft²pricier than$16434% of homes32% of homes
Living areabigger than1,494 ft²61% of homes54% of homes
Lot sizebigger than0.28 ac71% of homes56% of homes
Year builtnewer than194851% of homes42% of homes

About 121 W 21st Ave

How much is 121 W 21st Ave, Oshkosh, WI worth?

The TopHap Estimate for 121 W 21st Ave, Oshkosh, WI is $244,984 as of Sep 24, 2026. The likely range is $224,428 to $265,540. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 121 W 21st Ave, Oshkosh, WI?

121 W 21st Ave, Oshkosh, WI has 3 bedrooms, 1 bathrooms, 1,494 square feet of living space and a 0.28-acre lot.

When was 121 W 21st Ave, Oshkosh, WI built?

121 W 21st Ave, Oshkosh, WI was built in 1948, making it 78 years old. It is a cape cod home. The building has 2 stories.

What schools serve 121 W 21st Ave, Oshkosh, WI?

121 W 21st Ave, Oshkosh, WI is assigned to Jefferson Elementary School (elementary), rated D; South Park Middle School (middle), rated C-; Oshkosh West High School (high), rated A-. All sit in Oshkosh Area School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 121 W 21st Ave, Oshkosh, WI compare to other homes in Oshkosh 54902?

Among the 8,691 homes in Oshkosh 54902, it is worth more than 48% of them ($244,984 against a typical $248,226), its price per square foot is higher than 34% of them ($164 against a typical $186), it is bigger than 61% of them (1,494 ft² against a typical 1,370 ft²), its lot is bigger than 71% of them (0.28 ac against a typical 0.19 ac) and it is newer than 51% of them (1948 against a typical 1946). Measured against all of Winnebago County, it is worth more than 34% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 121 W 21st Ave, Oshkosh, WI?

The 2025 property tax bill for 121 W 21st Ave, Oshkosh, WI was $2,948. The county assessed it at $175,900.

More homes on W 21st Ave

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