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Single Family ResidenceResidential
$2,232,747$1,444 / 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 88How 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

378 MADISON ST

WEST ISLIP, NY 11795
3
Beds
2
Baths
1,546 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.
0.46 ac
Lot SizeThe size of the land the home sits on, from county records.
1992
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$2.2M
$2M low$2.5M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,618 (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.$942,600 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$696,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$246,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,496,190

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.Mobile Home
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.46
HeatingThe type of heating system in the home.Hot Water
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.Yes
ViewThe type of view from the property, or another feature of the site that affects value.Inferior
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 820 ft²Porch · 720 ft²

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

M
Pierson Middle/High SchoolA-
Middle · Grades 6–12 · 0.5 mi
E
Sag Harbor Elementary SchoolB+
Elementary · Grades PK–5 · 0.6 mi

District: Sag Harbor 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

378 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.

  • Among the most valuable homes in West Islip 11795
  • Among the highest price per square foot in West Islip 11795
  • Smaller than 71% of homes in West Islip 11795
  • Has a bigger lot than 93% of homes in West Islip 11795
  • Newer than 94% 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
$518K$1.9M

This home is worth more than almost all 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$2,232,747
CheaperTypical $705,024Pricier

Pricier than almost all homes nearby

Price per ft²$1444
CheaperTypical $436Pricier

Pricier than almost all homes nearby

Living area1,546 ft²
SmallerTypical 1,840 ft²Bigger

Bigger than 29% of homes nearby

Lot size0.46 ac
SmallerTypical 0.25 acBigger

Bigger than 93% of homes nearby

Year built1992
OlderTypical 1957Newer

Newer than 94% of homes nearby

How 378 Madison St ranks against every home in each area.
MeasureThis homeWest Islip 11795Suffolk County
Estimated valuepricier than$2,232,747almost all homes94% of homes
Price per ft²pricier than$1444almost all homes98% of homes
Living areabigger than1,546 ft²29% of homes42% of homes
Lot sizebigger than0.46 ac93% of homes72% of homes
Year builtnewer than199294% of homes78% of homes

About 378 Madison St

How much is 378 Madison St, West Islip, NY worth?

The TopHap Estimate for 378 Madison St, West Islip, NY is $2,232,747 as of Sep 24, 2026. The likely range is $1,967,872 to $2,497,622. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 378 Madison St, West Islip, NY last sell?

378 Madison St, West Islip, NY last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 378 Madison St, West Islip, NY?

378 Madison St, West Islip, NY has 3 bedrooms, 2 bathrooms, 1,546 square feet of living space and a 0.46-acre lot.

When was 378 Madison St, West Islip, NY built?

378 Madison St, West Islip, NY was built in 1992, making it 34 years old. It is a mobile home home. The building has 2 stories.

What schools serve 378 Madison St, West Islip, NY?

378 Madison St, West Islip, NY is assigned to Pierson Middle/High School (middle), rated A-; Sag Harbor Elementary School (elementary), rated B+. All sit in Sag Harbor Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 378 Madison St, West Islip, NY compare to other homes in West Islip 11795?

Among the 8,125 homes in West Islip 11795, it is worth more than almost all of them ($2,232,747 against a typical $705,024), its price per square foot is higher than almost all of them ($1444 against a typical $436), it is bigger than 29% of them (1,546 ft² against a typical 1,840 ft²), its lot is bigger than 93% of them (0.46 ac against a typical 0.25 ac) and it is newer than 94% of them (1992 against a typical 1957). Measured against all of Suffolk County, it is worth more than 94% 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 378 Madison St, West Islip, NY?

The 2024 property tax bill for 378 Madison St, West Islip, NY was $2,618. The county assessed it at $942,600.

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