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Single Family ResidenceResidential
$657,062$539 / 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
Last sold for $615,000 on Oct 10, 2014

47 PROSPECT AVE

SMITHTOWN, NY 11787
3
Beds
1
Baths
1,219 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.
0.22 ac
Lot SizeThe size of the land the home sits on, from county records.
1977
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$657K
$628K low$687K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$615,000 · Oct 10, 2014

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,861 (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.$4,095 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$220
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$3,875
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$511,875

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.8 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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
StyleThe architectural style of the home, such as ranch or colonial.Ranch
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.22
HeatingThe type of heating system in the home.Hot Water
PoolWhether the property has a pool, and what kind, such as in-ground.No
ViewThe type of view from the property, or another feature of the site that affects value.Suburban
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Shed · 140 ft²

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.

E
Dogwood Elementary SchoolB
Elementary · Grades KG–5 · 0.6 mi
H
Smithtown High School EastA+
High · Grades 9–12 · 1.1 mi
M
Nesaquake Middle SchoolB
Middle · Grades 6–8 · 1.4 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

47 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 86% of homes in Smithtown 11787
  • Costs more per square foot than 91% of homes in Nesconset
  • Smaller than 93% of homes in Nesconset
  • Has a smaller lot than 89% of homes in Smithtown 11787
  • Newer than 76% of 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
$525K$1.6M

This home is worth more than 14% 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$657,062
CheaperTypical $793,407Pricier

Pricier than 14% of homes nearby

Price per ft²$539
CheaperTypical $444Pricier

Pricier than 79% of homes nearby

Living area1,219 ft²
SmallerTypical 1,906 ft²Bigger

Bigger than 14% of homes nearby

Lot size0.22 ac
SmallerTypical 0.38 acBigger

Bigger than 11% of homes nearby

Year built1977
OlderTypical 1965Newer

Newer than 76% of homes nearby

How 47 Prospect Ave ranks against every home in each area.
MeasureThis homeNesconsetSmithtown 11787Suffolk County
Estimated valuepricier than$657,06216% of homes14% of homes43% of homes
Price per ft²pricier than$53991% of homes79% of homes77% of homes
Living areabigger than1,219 ft²7% of homes14% of homes23% of homes
Lot sizebigger than0.22 ac16% of homes11% of homes31% of homes
Year builtnewer than197763% of homes76% of homes64% of homes

About 47 Prospect Ave

How much is 47 Prospect Ave, Smithtown, NY worth?

The TopHap Estimate for 47 Prospect Ave, Smithtown, NY is $657,062 as of Aug 30, 2026. The likely range is $627,594 to $686,530. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 47 Prospect Ave, Smithtown, NY last sell?

47 Prospect Ave, Smithtown, NY last sold on Oct 10, 2014 for $615,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 47 Prospect Ave, Smithtown, NY?

47 Prospect Ave, Smithtown, NY has 3 bedrooms, 1 bathrooms, 1,219 square feet of living space and a 0.22-acre lot.

When was 47 Prospect Ave, Smithtown, NY built?

47 Prospect Ave, Smithtown, NY was built in 1977, making it 49 years old. It is a ranch home. The building has 1 story.

What schools serve 47 Prospect Ave, Smithtown, NY?

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

How does 47 Prospect Ave, Smithtown, NY compare to other homes in Smithtown 11787?

Among the 11,479 homes in Smithtown 11787, it is worth more than 14% of them ($657,062 against a typical $793,407), its price per square foot is higher than 79% of them ($539 against a typical $444), it is bigger than 14% of them (1,219 ft² against a typical 1,906 ft²), its lot is bigger than 11% of them (0.22 ac against a typical 0.38 ac) and it is newer than 76% of them (1977 against a typical 1965). Measured against all of Suffolk County, it is worth more than 43% 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 47 Prospect Ave, Smithtown, NY?

The 2024 property tax bill for 47 Prospect Ave, Smithtown, NY was $9,861. The county assessed it at $4,095.

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