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Single Family ResidenceResidential
$597,798$278 / 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 97How 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 $480,000 on Jun 8, 2022

20 ROSSMORE AVE

CENTRAL ISLIP, NY 11722
0
Baths
2,150 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.
0.19 ac
Lot SizeThe size of the land the home sits on, from county records.
1970
Year BuiltThe year the home was originally built, according to county records.

Valuation

$598K
$578K low$617K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$480,000 · Jun 8, 2022

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,200 (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.$32,300 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$4,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$28,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$454,929

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.0.19
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(5)

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
Cordello Avenue Elementary SchoolB-
Elementary · Grades KG–6 · 0.1 mi
H
Central Islip Senior High SchoolD+
High · Grades 9–12 · 0.8 mi
M
Charles a Mulligan Elementary SchoolC-
Middle · Grades KG–6 · 0.9 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

20 Rossmore 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 more than 72% of homes in Central Islip 11722
  • Costs less per square foot than 94% of homes in Suffolk County
  • Bigger than 89% of homes in Central Islip 11722
  • Has a smaller lot than 74% of homes in Suffolk County

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
$416K$776K

This home is worth more than 72% 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$597,798
CheaperTypical $549,683Pricier

Pricier than 72% of homes nearby

Price per ft²$278
CheaperTypical $411Pricier

Pricier than 8% of homes nearby

Living area2,150 ft²
SmallerTypical 1,351 ft²Bigger

Bigger than 89% of homes nearby

Lot size0.19 ac
SmallerTypical 0.18 acBigger

Bigger than 50% of homes nearby

Year built1970
OlderTypical 1966Newer

Newer than 57% of homes nearby

How 20 Rossmore Ave ranks against every home in each area.
MeasureThis homeCentral Islip 11722Suffolk County
Estimated valuepricier than$597,79872% of homes28% of homes
Price per ft²pricier than$2788% of homes6% of homes
Living areabigger than2,150 ft²89% of homes73% of homes
Lot sizebigger than0.19 ac50% of homes26% of homes
Year builtnewer than197057% of homes51% of homes

About 20 Rossmore Ave

How much is 20 Rossmore Ave, Central Islip, NY worth?

The TopHap Estimate for 20 Rossmore Ave, Central Islip, NY is $597,798 as of Sep 24, 2026. The likely range is $578,231 to $617,365. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20 Rossmore Ave, Central Islip, NY last sell?

20 Rossmore Ave, Central Islip, NY last sold on Jun 8, 2022 for $480,000, according to the county's recorded deed. TopHap holds 5 recorded sales for this parcel.

How big is 20 Rossmore Ave, Central Islip, NY?

20 Rossmore Ave, Central Islip, NY has 2,150 square feet of living space and a 0.19-acre lot.

When was 20 Rossmore Ave, Central Islip, NY built?

20 Rossmore Ave, Central Islip, NY was built in 1970, making it 56 years old.

What schools serve 20 Rossmore Ave, Central Islip, NY?

20 Rossmore Ave, Central Islip, NY is assigned to Cordello Avenue Elementary School (elementary), rated B-; Central Islip Senior High School (high), rated D+; Charles a Mulligan Elementary School (middle), rated C-. All sit in Central Islip Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20 Rossmore 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 72% of them ($597,798 against a typical $549,683), its price per square foot is higher than 8% of them ($278 against a typical $411), it is bigger than 89% of them (2,150 ft² against a typical 1,351 ft²), its lot is bigger than 50% of them (0.19 ac against a typical 0.18 ac) and it is newer than 57% of them (1970 against a typical 1966). Measured against all of Suffolk County, it is worth more than 28% 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 20 Rossmore Ave, Central Islip, NY?

The 2024 property tax bill for 20 Rossmore Ave, Central Islip, NY was $9,200. The county assessed it at $32,300.

More homes on Rossmore Ave

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More homes in Central Islip 11722

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