Skip to content
Skip to content
TopHapOpen in map
Industrial (General)Industrial
Last sold for $3,911,572 on Dec 6, 2000

521 COMMACK RD

ISLIP, NY 11751
0
Baths
84,000 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.
4.6 ac
Lot SizeThe size of the land the home sits on, from county records.
1976
Year BuiltThe year the home was originally built, according to county records.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$3,911,572 · Dec 6, 2000

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$800 (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.$49,280 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$14,040
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$35,240
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$8,352,542

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Industrial (General)
CountySUFFOLK
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.

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

H
Deer Park High SchoolA-
High · Grades 9–12 · 1.3 mi
E
John Quincy Adams Primary School
Elementary · Grades PK–2 · 1.7 mi
M
Robert Frost Middle SchoolB
Middle · Grades 6–8 · 2.0 mi

District: Deer Park 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.$119,597
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%

Owner Tools

Do you own this home?
Claim this home

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

521 Commack Rd 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 largest homes in Deer Park
  • Among the largest lots in Deer Park
  • Newer than 94% of homes in Deer Park

How it measures up in Islip 11751

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

Living area84,000 ft²
SmallerTypical 1,662 ft²Bigger

Bigger than almost all homes nearby

Lot size4.6 ac
SmallerTypical 0.24 acBigger

Bigger than almost all homes nearby

Year built1976
OlderTypical 1957Newer

Newer than 82% of homes nearby

How 521 Commack Rd ranks against every home in each area.
MeasureThis homeDeer ParkIslip 11751Suffolk County
Living areabigger than84,000 ft²almost all homesalmost all homesalmost all homes
Lot sizebigger than4.6 acalmost all homesalmost all homesalmost all homes
Year builtnewer than197694% of homes82% of homes63% of homes

About 521 Commack Rd

When did 521 Commack Rd, Islip, NY last sell?

521 Commack Rd, Islip, NY last sold on Dec 6, 2000 for $3,911,572, according to the county's recorded deed.

When was 521 Commack Rd, Islip, NY built?

521 Commack Rd, Islip, NY was built in 1976, making it 50 years old.

What schools serve 521 Commack Rd, Islip, NY?

521 Commack Rd, Islip, NY is assigned to Deer Park High School (high), rated A-; John Quincy Adams Primary School (elementary); Robert Frost Middle School (middle), rated B. All sit in Deer Park Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 521 Commack Rd, Islip, NY compare to other homes in Islip 11751?

Among the 4,166 homes in Islip 11751, it is bigger than almost all of them (84,000 ft² against a typical 1,662 ft²), its lot is bigger than almost all of them (4.6 ac against a typical 0.24 ac) and it is newer than 82% of them (1976 against a typical 1957). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 521 Commack Rd, Islip, NY?

The 2024 property tax bill for 521 Commack Rd, Islip, NY was $800. The county assessed it at $49,280.

More homes on Commack Rd

Closest homes

More homes in Islip 11751

Assigned schools

Explore the area

See this home in context

Open 521 Commack Rd on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map