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Single Family ResidenceResidential
$671,324$969 / 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 95How 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

40 PROSPECT AVE

ARDSLEY, NY 10502
1
Baths
693 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.
1928
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$671K
$638K low$705K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$16,231 (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.$662,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$326,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$336,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$608,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$662,900

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.40
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.
49
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.Single Family Residence
CountyWESTCHESTER
Lot (acres)The size of the land the home sits on, from county records.0.11
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.

M
Ardsley Middle SchoolA-
Middle · Grades 5–8 · 0.3 mi
E
Concord Road Elementary SchoolB+
Elementary · Grades KG–4 · 0.9 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

40 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.

  • Worth less than 96% of homes in Ardsley 10502
  • Costs more per square foot than 96% of homes in Westchester County
  • Among the smallest homes in Ardsley
  • Has a smaller lot than 92% of homes in Ardsley 10502
  • Older than 92% of homes in Ardsley 10502

What homes are worth in Ardsley 10502

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

This home
$523K$2.3M

This home is worth more than 4% of homes in Ardsley 10502.

How it measures up in Ardsley 10502

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

Estimated value$671,324
CheaperTypical $1,117,938Pricier

Pricier than 4% of homes nearby

Price per ft²$969
CheaperTypical $668Pricier

Pricier than 94% of homes nearby

Living area693 ft²
SmallerTypical 1,606 ft²Bigger

Smaller than almost all homes nearby

Lot size0.11 ac
SmallerTypical 0.22 acBigger

Bigger than 8% of homes nearby

Year built1928
OlderTypical 1954Newer

Newer than 8% of homes nearby

How 40 Prospect Ave ranks against every home in each area.
MeasureThis homeArdsleyArdsley 10502Westchester County
Estimated valuepricier than$671,3245% of homes4% of homes27% of homes
Price per ft²pricier than$96993% of homes94% of homes96% of homes
Living areabigger than693 ft²almost no homesalmost no homesalmost no homes
Lot sizebigger than0.11 ac9% of homes8% of homes25% of homes
Year builtnewer than19289% of homes8% of homes25% of homes

About 40 Prospect Ave

How much is 40 Prospect Ave, Ardsley, NY worth?

The TopHap Estimate for 40 Prospect Ave, Ardsley, NY is $671,324 as of Sep 24, 2026. The likely range is $637,782 to $704,866. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 40 Prospect Ave, Ardsley, NY last sell?

40 Prospect Ave, Ardsley, NY last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 40 Prospect Ave, Ardsley, NY?

40 Prospect Ave, Ardsley, NY has 1 bathrooms, 693 square feet of living space and a 0.11-acre lot.

When was 40 Prospect Ave, Ardsley, NY built?

40 Prospect Ave, Ardsley, NY was built in 1928, making it 98 years old. The building has 1 story.

What schools serve 40 Prospect Ave, Ardsley, NY?

40 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 40 Prospect Ave, Ardsley, NY compare to other homes in Ardsley 10502?

Among the 1,803 homes in Ardsley 10502, it is worth more than 4% of them ($671,324 against a typical $1,117,938), its price per square foot is higher than 94% of them ($969 against a typical $668), it is bigger than almost none of them (693 ft² against a typical 1,606 ft²), its lot is bigger than 8% of them (0.11 ac against a typical 0.22 ac) and it is newer than 8% of them (1928 against a typical 1954). Measured against all of Westchester County, it is worth more than 27% 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 40 Prospect Ave, Ardsley, NY?

The 2025 property tax bill for 40 Prospect Ave, Ardsley, NY was $16,231. The county assessed it at $662,900.

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