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Single Family ResidenceResidential
$379,133$184 / 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
Last sold for $206,700 on Feb 22, 2021

21 PROSPECT ST

UNIONVILLE, NY 10988
4
Beds
2
Baths
2,056 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.
0.78 ac
Lot SizeThe size of the land the home sits on, from county records.
1867
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$379K
$350K low$408K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$206,700 · Feb 22, 2021

Tax & Assessment

Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$89,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$24,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$64,100
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$89,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$307,300

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.67 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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.1 percent flood zone

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.Traditional/Old
CountyOrange
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1940
Lot (acres)The size of the land the home sits on, from county records.0.78
HeatingThe type of heating system in the home.Hot Water
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 270 ft²

Transaction History(1)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Foreclosure Filings(1)

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

M
Minisink Valley Middle SchoolC+
Middle · Grades 6–8 · 6.0 mi
E
Minisink Valley Elementary School
Elementary · Grades KG–2 · 6.2 mi
H
Minisink Valley High SchoolB-
High · Grades 9–12 · 6.4 mi

District: Minisink Valley Central School District

Neighborhood · ZIP 10988These 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.58
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.106
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.84

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.14%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.14%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.47
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.276 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$86,065
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$102,438
Average tempThe average temperature here across a full year.49°F
Annual precipHow much rain and melted snow falls here in a typical year.47 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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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

21 Prospect St 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 69% of homes in Orange County
  • Costs less per square foot than 93% of homes in Orange County
  • Bigger than 77% of homes in Unionville 10988
  • Has a bigger lot than 84% of homes in Unionville 10988
  • Older than 98% of homes in Orange County

What homes are worth in Unionville 10988

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

This home
$194K$628K

This home is worth more than 66% of homes in Unionville 10988.

How it measures up in Unionville 10988

The dot is this home. The mark in the middle is the typical home in Unionville 10988.

Estimated value$379,133
CheaperTypical $342,947Pricier

Pricier than 66% of homes nearby

Price per ft²$184
CheaperTypical $228Pricier

Pricier than 16% of homes nearby

Living area2,056 ft²
SmallerTypical 1,559 ft²Bigger

Bigger than 77% of homes nearby

Lot size0.78 ac
SmallerTypical 0.38 acBigger

Bigger than 84% of homes nearby

Year built1867
OlderTypical 1920Newer

Newer than 4% of homes nearby

How 21 Prospect St ranks against every home in each area.
MeasureThis homeUnionville 10988Orange County
Estimated valuepricier than$379,13366% of homes31% of homes
Price per ft²pricier than$18416% of homes7% of homes
Living areabigger than2,056 ft²77% of homes65% of homes
Lot sizebigger than0.78 ac84% of homes67% of homes
Year builtnewer than18674% of homes2% of homes

About 21 Prospect St

How much is 21 Prospect St, Unionville, NY worth?

The TopHap Estimate for 21 Prospect St, Unionville, NY is $379,133 as of Sep 24, 2026. The likely range is $350,410 to $407,856. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Prospect St, Unionville, NY last sell?

21 Prospect St, Unionville, NY last sold on Feb 22, 2021 for $206,700, according to the county's recorded deed.

How big is 21 Prospect St, Unionville, NY?

21 Prospect St, Unionville, NY has 4 bedrooms, 2 bathrooms, 2,056 square feet of living space and a 0.78-acre lot.

When was 21 Prospect St, Unionville, NY built?

21 Prospect St, Unionville, NY was built in 1867, making it 159 years old. It is a traditional/old home. The building has 2 stories.

What schools serve 21 Prospect St, Unionville, NY?

21 Prospect St, Unionville, NY is assigned to Minisink Valley Middle School (middle), rated C+; Minisink Valley Elementary School (elementary); Minisink Valley High School (high), rated B-. All sit in Minisink Valley Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Prospect St, Unionville, NY compare to other homes in Unionville 10988?

Among the 154 homes in Unionville 10988, it is worth more than 66% of them ($379,133 against a typical $342,947), its price per square foot is higher than 16% of them ($184 against a typical $228), it is bigger than 77% of them (2,056 ft² against a typical 1,559 ft²), its lot is bigger than 84% of them (0.78 ac against a typical 0.38 ac) and it is newer than 4% of them (1867 against a typical 1920). Measured against all of Orange County, it is worth more than 31% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

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