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Single Family ResidenceResidential
$831,368$363 / 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 94How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026

20 PLUM PL

ISLIP, NY 11751
0
Baths
2,292 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.
0.25 ac
Lot SizeThe size of the land the home sits on, from county records.
1965
Year BuiltThe year the home was originally built, according to county records.

Valuation

$831K
$778K low$884K high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$831,368
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$665,094

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.$50,300 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$9,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$40,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$708,450

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.24 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.45%
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.0.25
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No

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

E
Wing Elementary School
Elementary · Grades KG–1 · 0.7 mi
H
Islip High SchoolB+
High · Grades 9–12 · 0.8 mi
M
Islip Middle SchoolC+
Middle · Grades 7–8 · 0.9 mi

District: Islip Union Free School District

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.$119,596
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$137,796
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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.No

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

20 Plum Pl 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 86% of homes in Islip
  • Costs less per square foot than 79% of homes in Islip 11751
  • Bigger than 81% of homes in Islip
  • Newer than 71% of homes in Islip

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
$468K$1.9M

This home is worth more than 82% 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$831,368
CheaperTypical $650,648Pricier

Pricier than 82% of homes nearby

Price per ft²$363
CheaperTypical $443Pricier

Pricier than 21% of homes nearby

Living area2,292 ft²
SmallerTypical 1,653 ft²Bigger

Bigger than 79% of homes nearby

Lot size0.25 ac
SmallerTypical 0.24 acBigger

Bigger than 55% of homes nearby

Year built1965
OlderTypical 1957Newer

Newer than 70% of homes nearby

How 20 Plum Pl ranks against every home in each area.
MeasureThis homeIslipIslip 11751Suffolk County
Estimated valuepricier than$831,36886% of homes82% of homes70% of homes
Price per ft²pricier than$36323% of homes21% of homes31% of homes
Living areabigger than2,292 ft²81% of homes79% of homes79% of homes
Lot sizebigger than0.25 ac52% of homes55% of homes46% of homes
Year builtnewer than196571% of homes70% of homes42% of homes

About 20 Plum Pl

How much is 20 Plum Pl, Islip, NY worth?

The TopHap Estimate for 20 Plum Pl, Islip, NY is $831,368 as of Jul 14, 2026. The likely range is $778,441 to $884,295. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20 Plum Pl, Islip, NY last sell?

20 Plum Pl, Islip, NY last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 20 Plum Pl, Islip, NY?

20 Plum Pl, Islip, NY has 2,292 square feet of living space and a 0.25-acre lot.

When was 20 Plum Pl, Islip, NY built?

20 Plum Pl, Islip, NY was built in 1965, making it 61 years old.

What schools serve 20 Plum Pl, Islip, NY?

20 Plum Pl, Islip, NY is assigned to Wing Elementary School (elementary); Islip High School (high), rated B+; Islip Middle School (middle), rated C+. All sit in Islip Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20 Plum Pl, Islip, NY compare to other homes in Islip 11751?

Among the 4,166 homes in Islip 11751, it is worth more than 82% of them ($831,368 against a typical $650,648), its price per square foot is higher than 21% of them ($363 against a typical $443), it is bigger than 79% of them (2,292 ft² against a typical 1,653 ft²), its lot is bigger than 55% of them (0.25 ac against a typical 0.24 ac) and it is newer than 70% of them (1965 against a typical 1957). Measured against all of Suffolk County, it is worth more than 70% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

Closest homes

More homes in Islip 11751

Assigned schools

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