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Single Family ResidenceResidential
$560,698$630 / 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 97How 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

51 PROSPECT ST

SMITHTOWN, NY 11787
1
Baths
890 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.
0.12 ac
Lot SizeThe size of the land the home sits on, from county records.
1922
Year BuiltThe year the home was originally built, according to county records.

Valuation

$561K
$541K low$580K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,090 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$2,270 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$230
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$2,040
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$117,616

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.91 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.92%
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
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.12
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(2)

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.

H
Amityville Memorial High SchoolD+
High · Grades 9–12 · 0.7 mi
M
Edmund W. Miles Middle SchoolD+
Middle · Grades 6–8 · 1.9 mi
E
Northwest Elementary School
Elementary · Grades KG–2 · 2.1 mi

District: Amityville Union Free School District

Neighborhood · ZIP 11787These 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.44
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.108
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.69

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.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.2%
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.34,997
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,227 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$138,428
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$168,182
Average tempThe average temperature here across a full year.52°F
Annual precipHow much rain and melted snow falls here in a typical year.48 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

51 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 97% of homes in Smithtown 11787
  • Costs more per square foot than 90% of homes in Smithtown 11787
  • Smaller than 97% of homes in Smithtown 11787
  • Has a smaller lot than 94% of homes in Smithtown 11787
  • Among the oldest homes in Smithtown 11787

What homes are worth in Smithtown 11787

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

This home
$529K$1.7M

This home is worth more than 3% of homes in Smithtown 11787.

How it measures up in Smithtown 11787

The dot is this home. The mark in the middle is the typical home in Smithtown 11787.

Estimated value$560,698
CheaperTypical $794,169Pricier

Pricier than 3% of homes nearby

Price per ft²$630
CheaperTypical $444Pricier

Pricier than 90% of homes nearby

Living area890 ft²
SmallerTypical 1,907 ft²Bigger

Bigger than 3% of homes nearby

Lot size0.12 ac
SmallerTypical 0.38 acBigger

Bigger than 6% of homes nearby

Year built1922
OlderTypical 1965Newer

Older than almost all homes nearby

How 51 Prospect St ranks against every home in each area.
MeasureThis homeSmithtown 11787Suffolk County
Estimated valuepricier than$560,6983% of homes20% of homes
Price per ft²pricier than$63090% of homes85% of homes
Living areabigger than890 ft²3% of homes6% of homes
Lot sizebigger than0.12 ac6% of homes11% of homes
Year builtnewer than1922almost no homes3% of homes

About 51 Prospect St

How much is 51 Prospect St, Smithtown, NY worth?

The TopHap Estimate for 51 Prospect St, Smithtown, NY is $560,698 as of Sep 24, 2026. The likely range is $541,395 to $580,001. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 51 Prospect St, Smithtown, NY last sell?

51 Prospect St, Smithtown, NY last sold on Nov 20, 2018, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 51 Prospect St, Smithtown, NY?

51 Prospect St, Smithtown, NY has 1 bathrooms, 890 square feet of living space and a 0.12-acre lot.

When was 51 Prospect St, Smithtown, NY built?

51 Prospect St, Smithtown, NY was built in 1922, making it 104 years old.

What schools serve 51 Prospect St, Smithtown, NY?

51 Prospect St, Smithtown, NY is assigned to Amityville Memorial High School (high), rated D+; Edmund W. Miles Middle School (middle), rated D+; Northwest Elementary School (elementary). All sit in Amityville Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 51 Prospect St, Smithtown, NY compare to other homes in Smithtown 11787?

Among the 11,486 homes in Smithtown 11787, it is worth more than 3% of them ($560,698 against a typical $794,169), its price per square foot is higher than 90% of them ($630 against a typical $444), it is bigger than 3% of them (890 ft² against a typical 1,907 ft²), its lot is bigger than 6% of them (0.12 ac against a typical 0.38 ac) and it is newer than almost none of them (1922 against a typical 1965). Measured against all of Suffolk County, it is worth more than 20% 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 51 Prospect St, Smithtown, NY?

The 2024 property tax bill for 51 Prospect St, Smithtown, NY was $6,090. The county assessed it at $2,270.

More homes on Prospect St

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More homes in Smithtown 11787

Assigned schools

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