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Single Family ResidenceResidential
$645,539$420 / 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 Aug 30, 2026

87 S WILLIAM ST

PEARL RIVER, NY 10965
3
Beds
3
Baths
1,536 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.
1989
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$646K
$617K low$674K high

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.$154,600 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$17,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$137,200
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$154,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$484,792

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.Colonial
CountyRockland
Lot (acres)The size of the land the home sits on, from county records.0.11
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Raised (Unspecified)
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 · 144 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.

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

E
Franklin Avenue SchoolB-
Elementary · Grades KG–4 · 0.1 mi
H
Pearl River High SchoolA+
High · Grades 8–12 · 0.7 mi
M
Pearl River Middle SchoolB
Middle · Grades 5–7 · 1.0 mi

District: Pearl River Union Free School District

Neighborhood · ZIP 10965These 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.71
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.112
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.112

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.28%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.15,807
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,914 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$139,939
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$161,425
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.52%

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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

87 S William 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 68% of homes in Pearl River 10965
  • Costs more per square foot than 70% of homes in Rockland County
  • Smaller than 72% of homes in Rockland County
  • Has a smaller lot than 91% of homes in Pearl River 10965
  • Newer than 90% of homes in Pearl River 10965

What homes are worth in Pearl River 10965

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

This home
$331K$1.2M

This home is worth more than 32% of homes in Pearl River 10965.

How it measures up in Pearl River 10965

The dot is this home. The mark in the middle is the typical home in Pearl River 10965.

Estimated value$645,539
CheaperTypical $712,954Pricier

Pricier than 32% of homes nearby

Price per ft²$420
CheaperTypical $406Pricier

Pricier than 60% of homes nearby

Living area1,536 ft²
SmallerTypical 1,785 ft²Bigger

Bigger than 33% of homes nearby

Lot size0.11 ac
SmallerTypical 0.32 acBigger

Bigger than 9% of homes nearby

Year built1989
OlderTypical 1957Newer

Newer than 90% of homes nearby

How 87 S William St ranks against every home in each area.
MeasureThis homePearl River 10965Rockland County
Estimated valuepricier than$645,53932% of homes33% of homes
Price per ft²pricier than$42060% of homes70% of homes
Living areabigger than1,536 ft²33% of homes28% of homes
Lot sizebigger than0.11 ac9% of homes24% of homes
Year builtnewer than198990% of homes79% of homes

About 87 S William St

How much is 87 S William St, Pearl River, NY worth?

The TopHap Estimate for 87 S William St, Pearl River, NY is $645,539 as of Aug 30, 2026. The likely range is $616,825 to $674,253. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 87 S William St, Pearl River, NY last sell?

87 S William St, Pearl River, NY last sold on Mar 6, 2015, according to the county's recorded deed.

How big is 87 S William St, Pearl River, NY?

87 S William St, Pearl River, NY has 3 bedrooms, 3 bathrooms, 1,536 square feet of living space and a 0.11-acre lot.

When was 87 S William St, Pearl River, NY built?

87 S William St, Pearl River, NY was built in 1989, making it 37 years old. It is a colonial home. The building has 2 stories.

What schools serve 87 S William St, Pearl River, NY?

87 S William St, Pearl River, NY is assigned to Franklin Avenue School (elementary), rated B-; Pearl River High School (high), rated A+; Pearl River Middle School (middle), rated B. All sit in Pearl River Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 87 S William St, Pearl River, NY compare to other homes in Pearl River 10965?

Among the 4,704 homes in Pearl River 10965, it is worth more than 32% of them ($645,539 against a typical $712,954), its price per square foot is higher than 60% of them ($420 against a typical $406), it is bigger than 33% of them (1,536 ft² against a typical 1,785 ft²), its lot is bigger than 9% of them (0.11 ac against a typical 0.32 ac) and it is newer than 90% of them (1989 against a typical 1957). Measured against all of Rockland County, it is worth more than 33% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

More homes on S William St

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Assigned schools

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