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Single Family ResidenceResidential
$678,628
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 95How 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 $370,000 on Mar 24, 2016

321 MADISON ST

WEST ISLIP, NY 11795
0
Baths
0.17 ac
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$679K
$643K low$715K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$370,000 · Mar 24, 2016

Tax & Assessment

Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$41,500 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$7,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$34,100
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$584,507

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.12 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.62%
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
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.17
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.

M
Beach Street Middle SchoolA-
Middle · Grades 6–8 · 0.9 mi
H
West Islip High SchoolA-
High · Grades 9–12 · 1.1 mi
E
Paul J. Bellew Elementary SchoolA-
Elementary · Grades KG–5 · 1.1 mi

District: West Islip Union Free School District

Neighborhood · ZIP 11795These 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.37
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.72

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.26%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.7%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.25,576
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,944 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$160,580
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$181,705
Average tempThe average temperature here across a full year.53°F
Annual precipHow much rain and melted snow falls here in a typical year.49 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

321 Madison 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.

  • Has a smaller lot than 90% of homes in West Islip 11795

What homes are worth in West Islip 11795

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

This home
$516K$1.9M

This home is worth more than 40% of homes in West Islip 11795.

How it measures up in West Islip 11795

The dot is this home. The mark in the middle is the typical home in West Islip 11795.

Estimated value$678,628
CheaperTypical $704,434Pricier

Pricier than 40% of homes nearby

Lot size0.17 ac
SmallerTypical 0.25 acBigger

Bigger than 10% of homes nearby

How 321 Madison St ranks against every home in each area.
MeasureThis homeWest Islip 11795Suffolk County
Estimated valuepricier than$678,62840% of homes47% of homes
Lot sizebigger than0.17 ac10% of homes17% of homes

About 321 Madison St

How much is 321 Madison St, West Islip, NY worth?

The TopHap Estimate for 321 Madison St, West Islip, NY is $678,628 as of Sep 24, 2026. The likely range is $642,683 to $714,574. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 321 Madison St, West Islip, NY last sell?

321 Madison St, West Islip, NY last sold on Mar 24, 2016 for $370,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

What schools serve 321 Madison St, West Islip, NY?

321 Madison St, West Islip, NY is assigned to Beach Street Middle School (middle), rated A-; West Islip High School (high), rated A-; Paul J. Bellew Elementary School (elementary), rated A-. All sit in West Islip Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 321 Madison St, West Islip, NY compare to other homes in West Islip 11795?

Among the 8,124 homes in West Islip 11795, it is worth more than 40% of them ($678,628 against a typical $704,434) and its lot is bigger than 10% of them (0.17 ac against a typical 0.25 ac). Measured against all of Suffolk County, it is worth more than 47% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

More homes on Madison St

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Assigned schools

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See this home in context

Open 321 Madison St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

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