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Single Family ResidenceResidential
$572,130
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 89How 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 $155,450 on Mar 13, 2001

47 1ST ST

ISLIP, NY 11751
0
Baths
0.18 ac
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$572K
$508K low$636K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$155,450 · Mar 13, 2001

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,981 (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.$31,600 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$6,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$25,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$445,070

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.0.18
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Neighborhood · ZIP 11751These 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.59
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.102
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.19%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.2%
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.15,527
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,057 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$119,597
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$137,797
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 1st 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 78% of homes in Suffolk County
  • Has a smaller lot than 75% of homes in Suffolk County

What homes are worth in Islip 11751

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

This home
$459K$1.7M

This home is worth more than 26% of homes in Islip 11751.

How it measures up in Islip 11751

The dot is this home. The mark in the middle is the typical home in Islip 11751.

Estimated value$572,130
CheaperTypical $640,729Pricier

Pricier than 26% of homes nearby

Lot size0.18 ac
SmallerTypical 0.24 acBigger

Bigger than 29% of homes nearby

How 47 1st St ranks against every home in each area.
MeasureThis homeBrentwoodIslip 11751Suffolk County
Estimated valuepricier than$572,13036% of homes26% of homes22% of homes
Lot sizebigger than0.18 ac28% of homes29% of homes25% of homes

About 47 1st St

How much is 47 1st St, Islip, NY worth?

The TopHap Estimate for 47 1st St, Islip, NY is $572,130 as of Sep 24, 2026. The likely range is $508,131 to $636,129. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 47 1st St, Islip, NY last sell?

47 1st St, Islip, NY last sold on Mar 13, 2001 for $155,450, according to the county's recorded deed.

How does 47 1st St, Islip, NY compare to other homes in Islip 11751?

Among the 4,166 homes in Islip 11751, it is worth more than 26% of them ($572,130 against a typical $640,729) and its lot is bigger than 29% of them (0.18 ac against a typical 0.24 ac). Measured against all of Suffolk County, it is worth more than 22% 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 1st St, Islip, NY?

The 2024 property tax bill for 47 1st St, Islip, NY was $7,981. The county assessed it at $31,600.

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