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Duplex (2 Units, Any Combination)Residential
Last sold for $740,000 on Jul 9, 2020

20 PROSPECT AVE

ARDSLEY, NY 10502
2
Baths
2,519 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.
0.23 ac
Lot SizeThe size of the land the home sits on, from county records.
1895
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$740,000 · Jul 9, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$18,444 (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.$1,030,200 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$350,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$679,500
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$945,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,030,200

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.34
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
4
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
66
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
84
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
16
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
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.Duplex (2 Units, Any Combination)
StyleThe architectural style of the home, such as ranch or colonial.Duplex Single
CountyWESTCHESTER
Lot (acres)The size of the land the home sits on, from county records.0.23
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(3)

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

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

M
Ardsley Middle SchoolA-
Middle · Grades 5–8 · 0.4 mi
E
Concord Road Elementary SchoolB+
Elementary · Grades KG–4 · 0.8 mi
H
Ardsley High SchoolA+
High · Grades 9–12 · 1.1 mi

District: Ardsley Union Free School District

Neighborhood · ZIP 10502These 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.19
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.114
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.111

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.33%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.6,429
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,036 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$189,522
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$226,971
Average tempThe average temperature here across a full year.52°F
Annual precipHow much rain and melted snow falls here in a typical year.50 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.55%

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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

20 Prospect 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.

  • Bigger than 86% of homes in Ardsley
  • Among the oldest homes in Ardsley

How it measures up in Ardsley 10502

The dot is this home. The mark in the middle is the typical home in Ardsley 10502.

Living area2,519 ft²
SmallerTypical 1,603 ft²Bigger

Bigger than 84% of homes nearby

Lot size0.23 ac
SmallerTypical 0.22 acBigger

Bigger than 58% of homes nearby

Year built1895
OlderTypical 1954Newer

Older than almost all homes nearby

How 20 Prospect Ave ranks against every home in each area.
MeasureThis homeArdsleyArdsley 10502Westchester County
Living areabigger than2,519 ft²86% of homes84% of homes66% of homes
Lot sizebigger than0.23 ac63% of homes58% of homes54% of homes
Year builtnewer than1895almost no homesalmost no homes3% of homes

About 20 Prospect Ave

When did 20 Prospect Ave, Ardsley, NY last sell?

20 Prospect Ave, Ardsley, NY last sold on Jul 9, 2020 for $740,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 20 Prospect Ave, Ardsley, NY?

20 Prospect Ave, Ardsley, NY has 2 bathrooms, 2,519 square feet of living space and a 0.23-acre lot.

When was 20 Prospect Ave, Ardsley, NY built?

20 Prospect Ave, Ardsley, NY was built in 1895, making it 131 years old. It is a duplex single home. The building has 2 stories.

What schools serve 20 Prospect Ave, Ardsley, NY?

20 Prospect Ave, Ardsley, NY is assigned to Ardsley Middle School (middle), rated A-; Concord Road Elementary School (elementary), rated B+; Ardsley High School (high), rated A+. All sit in Ardsley Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20 Prospect Ave, Ardsley, NY compare to other homes in Ardsley 10502?

Among the 1,803 homes in Ardsley 10502, it is bigger than 84% of them (2,519 ft² against a typical 1,603 ft²), its lot is bigger than 58% of them (0.23 ac against a typical 0.22 ac) and it is newer than almost none of them (1895 against a typical 1954). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 20 Prospect Ave, Ardsley, NY?

The 2025 property tax bill for 20 Prospect Ave, Ardsley, NY was $18,444. The county assessed it at $1,030,200.

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