Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$831,072$527 / 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 91How 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 $750,000 on Jan 16, 2025

3 PROSPECT ST

SMITHTOWN, NY 11787
3
Beds
1
Baths
1,577 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.
0.75 ac
Lot SizeThe size of the land the home sits on, from county records.
1887
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$831K
$758K low$904K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$750,000 · Jan 16, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,799 (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.$3,710 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$590
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$3,120
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$463,750

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
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.75
HeatingThe type of heating system in the home.Hot Water
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
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

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%

Owner Tools

Do you own this home?
Claim this home

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

3 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 69% of homes in Suffolk County
  • Costs more per square foot than 78% of homes in Smithtown
  • Smaller than 73% of homes in Smithtown
  • Has a bigger lot than 87% of homes in Smithtown 11787
  • Among the oldest 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
$527K$1.6M

This home is worth more than 60% 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$831,072
CheaperTypical $794,276Pricier

Pricier than 60% of homes nearby

Price per ft²$527
CheaperTypical $445Pricier

Pricier than 76% of homes nearby

Living area1,577 ft²
SmallerTypical 1,906 ft²Bigger

Bigger than 29% of homes nearby

Lot size0.75 ac
SmallerTypical 0.38 acBigger

Bigger than 87% of homes nearby

Year built1887
OlderTypical 1965Newer

Older than almost all homes nearby

How 3 Prospect St ranks against every home in each area.
MeasureThis homeSmithtownSmithtown 11787Suffolk County
Estimated valuepricier than$831,07256% of homes60% of homes69% of homes
Price per ft²pricier than$52778% of homes76% of homes76% of homes
Living areabigger than1,577 ft²27% of homes29% of homes44% of homes
Lot sizebigger than0.75 ac84% of homes87% of homes85% of homes
Year builtnewer than1887almost no homesalmost no homesalmost no homes

About 3 Prospect St

How much is 3 Prospect St, Smithtown, NY worth?

The TopHap Estimate for 3 Prospect St, Smithtown, NY is $831,072 as of Aug 30, 2026. The likely range is $757,663 to $904,481. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3 Prospect St, Smithtown, NY last sell?

3 Prospect St, Smithtown, NY last sold on Jan 16, 2025 for $750,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 3 Prospect St, Smithtown, NY?

3 Prospect St, Smithtown, NY has 3 bedrooms, 1 bathrooms, 1,577 square feet of living space and a 0.75-acre lot.

When was 3 Prospect St, Smithtown, NY built?

3 Prospect St, Smithtown, NY was built in 1887, making it 139 years old. It is a colonial home. The building has 2 stories.

What schools serve 3 Prospect St, Smithtown, NY?

3 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 3 Prospect St, Smithtown, NY compare to other homes in Smithtown 11787?

Among the 11,478 homes in Smithtown 11787, it is worth more than 60% of them ($831,072 against a typical $794,276), its price per square foot is higher than 76% of them ($527 against a typical $445), it is bigger than 29% of them (1,577 ft² against a typical 1,906 ft²), its lot is bigger than 87% of them (0.75 ac against a typical 0.38 ac) and it is newer than almost none of them (1887 against a typical 1965). Measured against all of Suffolk County, it is worth more than 69% 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 3 Prospect St, Smithtown, NY?

The 2024 property tax bill for 3 Prospect St, Smithtown, NY was $9,799. The county assessed it at $3,710.

More homes on Prospect St

Closest homes

More homes in Smithtown 11787

Assigned schools

Explore the area

See this home in context

Open 3 Prospect St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map