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Multi-Family Dwellings (Generic, Any Combination)Residential
Last sold for $1,450,000 on Jun 15, 2022

421 SPLIT ROCK RD

SYOSSET, NY 11791
4.5
Baths
4,117 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.
2.03 ac
Lot SizeThe size of the land the home sits on, from county records.
1937
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
16
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,450,000 · Jun 15, 2022

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$43,848 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$1,386 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$804
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$582
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,440
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,386,000

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.4 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.Multi-Family Dwellings (Generic, Any Combination)
StyleThe architectural style of the home, such as ranch or colonial.Colonial
CountyNASSAU
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
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.Secondary
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 800 ft²Porch · 681 ft²

Transaction History(1)

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.

E
Berry Hill Elementary SchoolB
Elementary · Grades KG–5 · 1.2 mi
M
South Woods Middle SchoolA-
Middle · Grades 6–8 · 1.6 mi
H
Syosset Senior High SchoolA+
High · Grades 9–12 · 1.8 mi

District: Syosset Central School District

Neighborhood · ZIP 11791These 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.58
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.108
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.92

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.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.1%
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.25,701
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,064 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$180,785
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$232,702
Average tempThe average temperature here across a full year.52°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.56%

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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

421 Split Rock 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.

  • Bigger than 98% of homes in Syosset
  • Has a bigger lot than 98% of homes in Nassau County
  • Older than 96% of homes in Syosset

How it measures up in Syosset 11791

The dot is this home. The mark in the middle is the typical home in Syosset 11791.

Living area4,117 ft²
SmallerTypical 2,061 ft²Bigger

Bigger than 89% of homes nearby

Lot size2.03 ac
SmallerTypical 0.21 acBigger

Bigger than 91% of homes nearby

Year built1937
OlderTypical 1957Newer

Newer than 4% of homes nearby

How 421 Split Rock Rd ranks against every home in each area.
MeasureThis homeSyossetSyosset 11791Nassau County
Living areabigger than4,117 ft²98% of homes89% of homes96% of homes
Lot sizebigger than2.03 ac97% of homes91% of homes98% of homes
Year builtnewer than19374% of homes4% of homes20% of homes

About 421 Split Rock Rd

When did 421 Split Rock Rd, Syosset, NY last sell?

421 Split Rock Rd, Syosset, NY last sold on Jun 15, 2022 for $1,450,000, according to the county's recorded deed.

How big is 421 Split Rock Rd, Syosset, NY?

421 Split Rock Rd, Syosset, NY has 4.5 bathrooms and 4,117 square feet of living space.

When was 421 Split Rock Rd, Syosset, NY built?

421 Split Rock Rd, Syosset, NY was built in 1937, making it 89 years old. It is a colonial home. The building has 2 stories.

What schools serve 421 Split Rock Rd, Syosset, NY?

421 Split Rock Rd, Syosset, NY is assigned to Berry Hill Elementary School (elementary), rated B; South Woods Middle School (middle), rated A-; Syosset Senior High School (high), rated A+. All sit in Syosset Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 421 Split Rock Rd, Syosset, NY compare to other homes in Syosset 11791?

Among the 8,086 homes in Syosset 11791, it is bigger than 89% of them (4,117 ft² against a typical 2,061 ft²), its lot is bigger than 91% of them (2.03 ac against a typical 0.21 ac) and it is newer than 4% of them (1937 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 421 Split Rock Rd, Syosset, NY?

The 2025 property tax bill for 421 Split Rock Rd, Syosset, NY was $43,848. The county assessed it at $1,386.

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