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Single Family ResidenceResidential
$260,857$203 / 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 96How 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
Last sold for $31,300 on Dec 3, 1993

646 W 18TH AVE

OSHKOSH, WI 54902
3
Beds
1
Baths
1,282 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.
0.34 ac
Lot SizeThe size of the land the home sits on, from county records.
1950
Year BuiltThe year the home was originally built, according to county records.
1
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

$261K
$252K low$270K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$31,300 · Dec 3, 1993

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,194 (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.$189,400 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$42,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$147,300
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$189,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$193,915

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.6 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

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.Ranch
CountyWinnebago
Lot (acres)The size of the land the home sits on, from county records.0.34
HeatingThe type of heating system in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached

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

M
South Park Middle SchoolC-
Middle · Grades 6–8 · 0.3 mi
E
Shapiro STEM AcademyD
Elementary · Grades KG–5 · 0.5 mi
H
Oshkosh West High SchoolA-
High · Grades 9–12 · 1.8 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

646 W 18th 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.

  • Has a bigger lot than 77% 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
$136K$708K

This home is worth more than 57% 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$260,857
CheaperTypical $247,934Pricier

Pricier than 57% of homes nearby

Price per ft²$203
CheaperTypical $185Pricier

Pricier than 63% of homes nearby

Living area1,282 ft²
SmallerTypical 1,364 ft²Bigger

Bigger than 42% of homes nearby

Lot size0.34 ac
SmallerTypical 0.19 acBigger

Bigger than 77% of homes nearby

Year built1950
OlderTypical 1948Newer

Newer than 54% of homes nearby

How 646 W 18th Ave ranks against every home in each area.
MeasureThis homeOshkosh 54902Winnebago County
Estimated valuepricier than$260,85757% of homes40% of homes
Price per ft²pricier than$20363% of homes59% of homes
Living areabigger than1,282 ft²42% of homes36% of homes
Lot sizebigger than0.34 ac77% of homes66% of homes
Year builtnewer than195054% of homes45% of homes

About 646 W 18th Ave

How much is 646 W 18th Ave, Oshkosh, WI worth?

The TopHap Estimate for 646 W 18th Ave, Oshkosh, WI is $260,857 as of Sep 24, 2026. The likely range is $251,621 to $270,093. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 646 W 18th Ave, Oshkosh, WI last sell?

646 W 18th Ave, Oshkosh, WI last sold on Dec 3, 1993 for $31,300, according to the county's recorded deed.

How big is 646 W 18th Ave, Oshkosh, WI?

646 W 18th Ave, Oshkosh, WI has 3 bedrooms, 1 bathrooms, 1,282 square feet of living space and a 0.34-acre lot.

When was 646 W 18th Ave, Oshkosh, WI built?

646 W 18th Ave, Oshkosh, WI was built in 1950, making it 76 years old. It is a ranch home. The building has 1 story.

What schools serve 646 W 18th Ave, Oshkosh, WI?

646 W 18th Ave, Oshkosh, WI is assigned to South Park Middle School (middle), rated C-; Shapiro STEM Academy (elementary), rated D; 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 646 W 18th Ave, Oshkosh, WI compare to other homes in Oshkosh 54902?

Among the 8,638 homes in Oshkosh 54902, it is worth more than 57% of them ($260,857 against a typical $247,934), its price per square foot is higher than 63% of them ($203 against a typical $185), it is bigger than 42% of them (1,282 ft² against a typical 1,364 ft²), its lot is bigger than 77% of them (0.34 ac against a typical 0.19 ac) and it is newer than 54% of them (1950 against a typical 1948). Measured against all of Winnebago County, it is worth more than 40% 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 646 W 18th Ave, Oshkosh, WI?

The 2025 property tax bill for 646 W 18th Ave, Oshkosh, WI was $3,194. The county assessed it at $189,400.

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