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Single Family ResidenceResidential
$518,375$637 / 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 92How 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
Last sold for $226,840 on Oct 30, 2018

447 PROSPECT AVE

CENTRAL ISLIP, NY 11722
0
Baths
814 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.
0.45 ac
Lot SizeThe size of the land the home sits on, from county records.
1929
Year BuiltThe year the home was originally built, according to county records.

Valuation

$518K
$475K low$562K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$226,840 · Oct 30, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,188 (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.$32,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$10,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$21,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$450,704

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.0.45
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

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.

Foreclosure Filings(1)

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

E
Anthony Alfano Elementary SchoolD-
Elementary · Grades PK–6 · 0.9 mi
H
Central Islip Senior High SchoolD+
High · Grades 9–12 · 0.9 mi
M
Ralph Reed SchoolD
Middle · Grades 7–8 · 1.6 mi

District: Central Islip Union Free School District

Neighborhood · ZIP 11722These 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.72
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.107
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.67

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.13%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.37,500
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.5,450 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$98,750
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$123,293
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

447 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 87% of homes in Suffolk County
  • Costs more per square foot than 93% of homes in Central Islip 11722
  • Smaller than 96% of homes in Central Islip 11722
  • Has a bigger lot than 89% of homes in Central Islip 11722
  • Older than 97% of homes in Central Islip 11722

What homes are worth in Central Islip 11722

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

This home
$412K$780K

This home is worth more than 32% of homes in Central Islip 11722.

How it measures up in Central Islip 11722

The dot is this home. The mark in the middle is the typical home in Central Islip 11722.

Estimated value$518,375
CheaperTypical $550,343Pricier

Pricier than 32% of homes nearby

Price per ft²$637
CheaperTypical $412Pricier

Pricier than 93% of homes nearby

Living area814 ft²
SmallerTypical 1,353 ft²Bigger

Bigger than 4% of homes nearby

Lot size0.45 ac
SmallerTypical 0.18 acBigger

Bigger than 89% of homes nearby

Year built1929
OlderTypical 1966Newer

Newer than 3% of homes nearby

How 447 Prospect Ave ranks against every home in each area.
MeasureThis homeCentral Islip 11722Suffolk County
Estimated valuepricier than$518,37532% of homes13% of homes
Price per ft²pricier than$63793% of homes85% of homes
Living areabigger than814 ft²4% of homes4% of homes
Lot sizebigger than0.45 ac89% of homes70% of homes
Year builtnewer than19293% of homes4% of homes

About 447 Prospect Ave

How much is 447 Prospect Ave, Central Islip, NY worth?

The TopHap Estimate for 447 Prospect Ave, Central Islip, NY is $518,375 as of Sep 24, 2026. The likely range is $474,979 to $561,770. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 447 Prospect Ave, Central Islip, NY last sell?

447 Prospect Ave, Central Islip, NY last sold on Oct 30, 2018 for $226,840, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 447 Prospect Ave, Central Islip, NY?

447 Prospect Ave, Central Islip, NY has 814 square feet of living space and a 0.45-acre lot.

When was 447 Prospect Ave, Central Islip, NY built?

447 Prospect Ave, Central Islip, NY was built in 1929, making it 97 years old.

What schools serve 447 Prospect Ave, Central Islip, NY?

447 Prospect Ave, Central Islip, NY is assigned to Anthony Alfano Elementary School (elementary), rated D-; Central Islip Senior High School (high), rated D+; Ralph Reed School (middle), rated D. All sit in Central Islip Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 447 Prospect Ave, Central Islip, NY compare to other homes in Central Islip 11722?

Among the 8,244 homes in Central Islip 11722, it is worth more than 32% of them ($518,375 against a typical $550,343), its price per square foot is higher than 93% of them ($637 against a typical $412), it is bigger than 4% of them (814 ft² against a typical 1,353 ft²), its lot is bigger than 89% of them (0.45 ac against a typical 0.18 ac) and it is newer than 3% of them (1929 against a typical 1966). Measured against all of Suffolk County, it is worth more than 13% 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 447 Prospect Ave, Central Islip, NY?

The 2024 property tax bill for 447 Prospect Ave, Central Islip, NY was $10,188. The county assessed it at $32,000.

More homes on Prospect Ave

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