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Single Family ResidenceResidential
$702,554$564 / 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 Oct 21, 2026
Last sold for $185,000 on Oct 27, 1998

21 RENSSELAER DR

COMMACK, NY 11725
3
Beds
1
Baths
1,246 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.
0.41 ac
Lot SizeThe size of the land the home sits on, from county records.
1959
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$703K
$663K low$742K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$185,000 · Oct 27, 1998

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,120 (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.$4,750 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$360
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$4,390
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$593,750

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.95 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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
StyleThe architectural style of the home, such as ranch or colonial.Ranch
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.41
HeatingThe type of heating system in the home.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No
ViewThe type of view from the property, or another feature of the site that affects value.Suburban
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Shed · 64 ft²

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.

Neighborhood · ZIP 11725These 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.42
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 100.75

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.98%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.32%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.3%
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.29,060
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,956 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$164,054
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$187,880
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

21 Rensselaer Dr 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 less than 79% of homes in Commack 11725
  • Costs more per square foot than 79% of homes in Commack 11725
  • Smaller than 84% of homes in Commack 11725
  • Has a bigger lot than 80% of homes in Commack 11725
  • Older than 73% of homes in Commack 11725

What homes are worth in Commack 11725

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

This home
$583K$1.3M

This home is worth more than 21% of homes in Commack 11725.

How it measures up in Commack 11725

The dot is this home. The mark in the middle is the typical home in Commack 11725.

Estimated value$702,554
CheaperTypical $790,293Pricier

Pricier than 21% of homes nearby

Price per ft²$564
CheaperTypical $476Pricier

Pricier than 79% of homes nearby

Living area1,246 ft²
SmallerTypical 1,819 ft²Bigger

Bigger than 16% of homes nearby

Lot size0.41 ac
SmallerTypical 0.26 acBigger

Bigger than 80% of homes nearby

Year built1959
OlderTypical 1963Newer

Newer than 27% of homes nearby

How 21 Rensselaer Dr ranks against every home in each area.
MeasureThis homeCommack 11725Suffolk County
Estimated valuepricier than$702,55421% of homes51% of homes
Price per ft²pricier than$56479% of homes79% of homes
Living areabigger than1,246 ft²16% of homes25% of homes
Lot sizebigger than0.41 ac80% of homes67% of homes
Year builtnewer than195927% of homes29% of homes

About 21 Rensselaer Dr

How much is 21 Rensselaer Dr, Commack, NY worth?

The TopHap Estimate for 21 Rensselaer Dr, Commack, NY is $702,554 as of Oct 21, 2026. The likely range is $663,294 to $741,814. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Rensselaer Dr, Commack, NY last sell?

21 Rensselaer Dr, Commack, NY last sold on Oct 27, 1998 for $185,000, according to the county's recorded deed.

How big is 21 Rensselaer Dr, Commack, NY?

21 Rensselaer Dr, Commack, NY has 3 bedrooms, 1 bathrooms, 1,246 square feet of living space and a 0.41-acre lot.

When was 21 Rensselaer Dr, Commack, NY built?

21 Rensselaer Dr, Commack, NY was built in 1959, making it 67 years old. It is a ranch home. The building has 1 story.

How does 21 Rensselaer Dr, Commack, NY compare to other homes in Commack 11725?

Among the 9,143 homes in Commack 11725, it is worth more than 21% of them ($702,554 against a typical $790,293), its price per square foot is higher than 79% of them ($564 against a typical $476), it is bigger than 16% of them (1,246 ft² against a typical 1,819 ft²), its lot is bigger than 80% of them (0.41 ac against a typical 0.26 ac) and it is newer than 27% of them (1959 against a typical 1963). Measured against all of Suffolk County, it is worth more than 51% 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 21 Rensselaer Dr, Commack, NY?

The 2024 property tax bill for 21 Rensselaer Dr, Commack, NY was $12,120. The county assessed it at $4,750.

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