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Residential - Vacant LandResidential
$970,745
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 88How 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
Last sold for $451,000 on Mar 17, 2017

15 PROSPECT ST

SMITHTOWN, NY 11787
0
Baths
2,178 ft²
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$971K
$858K low$1.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$451,000 · Mar 17, 2017

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$112 (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.$45 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$45
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$5,625

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Residential - Vacant Land
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.05
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.

E
Smithtown Elementary SchoolB
Elementary · Grades KG–5 · 0.5 mi
M
Accompsett Middle SchoolC+
Middle · Grades 6–8 · 2.1 mi
H
Smithtown High School WestA
High · Grades 9–12 · 2.3 mi

District: Smithtown Central 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

15 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 more than 83% of homes in Smithtown 11787
  • Has a smaller lot than 98% of homes in Smithtown

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
$538K$1.7M

This home is worth more than 83% 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$970,745
CheaperTypical $793,407Pricier

Pricier than 83% of homes nearby

Lot size2,178 ft²
SmallerTypical 0.38 acBigger

Bigger than 5% of homes nearby

How 15 Prospect St ranks against every home in each area.
MeasureThis homeSmithtownSmithtown 11787Suffolk County
Estimated valuepricier than$970,74579% of homes83% of homes78% of homes
Lot sizebigger than2,178 ft²2% of homes5% of homes4% of homes

About 15 Prospect St

How much is 15 Prospect St, Smithtown, NY worth?

The TopHap Estimate for 15 Prospect St, Smithtown, NY is $970,745 as of Aug 30, 2026. The likely range is $858,232 to $1,083,258. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 15 Prospect St, Smithtown, NY last sell?

15 Prospect St, Smithtown, NY last sold on Mar 17, 2017 for $451,000, according to the county's recorded deed.

What schools serve 15 Prospect St, Smithtown, NY?

15 Prospect St, Smithtown, NY is assigned to Smithtown Elementary School (elementary), rated B; Accompsett Middle School (middle), rated C+; Smithtown High School West (high), rated A. All sit in Smithtown Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 15 Prospect St, Smithtown, NY compare to other homes in Smithtown 11787?

Among the 11,479 homes in Smithtown 11787, it is worth more than 83% of them ($970,745 against a typical $793,407) and its lot is bigger than 5% of them (2,178 ft² against a typical 0.38 ac). Measured against all of Suffolk County, it is worth more than 78% 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 15 Prospect St, Smithtown, NY?

The 2024 property tax bill for 15 Prospect St, Smithtown, NY was $112. The county assessed it at $45.

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Assigned schools

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