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Single Family ResidenceResidential
$829,211$491 / 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 94How 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 $280,000 on Jan 23, 2002

21 PROSPECT ST

WILLISTON PARK, NY 11596
1
Baths
1,690 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.
0.11 ac
Lot SizeThe size of the land the home sits on, from county records.
1926
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$829K
$783K low$875K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$280,000 · Jan 23, 2002

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$11,814 (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.$632 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$327
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$305
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$632
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$632,000

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyNASSAU
Lot (acres)The size of the land the home sits on, from county records.0.11
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Wood Shingle
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No

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

E
Center Street SchoolA+
Elementary · Grades KG–5 · 0.5 mi
M
Herricks High SchoolA+
Middle · Grades 9–12 · 1.0 mi

District: Herricks Union Free School District

Neighborhood · ZIP 11596These 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.50
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.110
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.93

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.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.6%
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.10,984
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.8,334 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$162,382
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$199,233
Average tempThe average temperature here across a full year.53°F
Annual precipHow much rain and melted snow falls here in a typical year.49 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.56%

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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 80% of homes in Williston Park 11596
  • Costs less per square foot than 93% of homes in Williston Park 11596
  • Has a smaller lot than 85% of homes in Nassau County
  • Older than 92% of homes in Williston Park 11596

What homes are worth in Williston Park 11596

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

This home
$694K$2.1M

This home is worth more than 20% of homes in Williston Park 11596.

How it measures up in Williston Park 11596

The dot is this home. The mark in the middle is the typical home in Williston Park 11596.

Estimated value$829,211
CheaperTypical $961,471Pricier

Pricier than 20% of homes nearby

Price per ft²$491
CheaperTypical $611Pricier

Pricier than 7% of homes nearby

Living area1,690 ft²
SmallerTypical 1,668 ft²Bigger

Bigger than 52% of homes nearby

Lot size0.11 ac
SmallerTypical 0.11 acBigger

Bigger than 41% of homes nearby

Year built1926
OlderTypical 1937Newer

Newer than 8% of homes nearby

How 21 Prospect St ranks against every home in each area.
MeasureThis homeWilliston Park 11596Nassau County
Estimated valuepricier than$829,21120% of homes50% of homes
Price per ft²pricier than$4917% of homes41% of homes
Living areabigger than1,690 ft²52% of homes48% of homes
Lot sizebigger than0.11 ac41% of homes15% of homes
Year builtnewer than19268% of homes11% of homes

About 21 Prospect St

How much is 21 Prospect St, Williston Park, NY worth?

The TopHap Estimate for 21 Prospect St, Williston Park, NY is $829,211 as of Sep 24, 2026. The likely range is $783,277 to $875,145. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Prospect St, Williston Park, NY last sell?

21 Prospect St, Williston Park, NY last sold on Jan 23, 2002 for $280,000, according to the county's recorded deed.

How big is 21 Prospect St, Williston Park, NY?

21 Prospect St, Williston Park, NY has 1 bathrooms, 1,690 square feet of living space and a 0.11-acre lot.

When was 21 Prospect St, Williston Park, NY built?

21 Prospect St, Williston Park, NY was built in 1926, making it 100 years old. The building has 2 stories.

What schools serve 21 Prospect St, Williston Park, NY?

21 Prospect St, Williston Park, NY is assigned to Center Street School (elementary), rated A+; Herricks High School (middle), rated A+. All sit in Herricks Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Prospect St, Williston Park, NY compare to other homes in Williston Park 11596?

Among the 3,290 homes in Williston Park 11596, it is worth more than 20% of them ($829,211 against a typical $961,471), its price per square foot is higher than 7% of them ($491 against a typical $611), it is bigger than 52% of them (1,690 ft² against a typical 1,668 ft²), its lot is bigger than 41% of them (0.11 ac against a typical 0.11 ac) and it is newer than 8% of them (1926 against a typical 1937). Measured against all of Nassau County, it is worth more than 50% 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 21 Prospect St, Williston Park, NY?

The 2025 property tax bill for 21 Prospect St, Williston Park, NY was $11,814. The county assessed it at $632.

More homes on Prospect St

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More homes in Williston Park 11596

Assigned schools

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