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Residential - Vacant LandResidential
$935,961
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 74How 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 $830,000 on Apr 26, 2016

17 DORCAS AVE

SYOSSET, NY 11791
0
Baths
350 ft²
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$936K
$696K low$1.2M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$830,000 · Apr 26, 2016

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$63 (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.$2 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$2
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$2
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$2,000

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.13 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
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.Residential - Vacant Land
CountyNASSAU
Lot (acres)The size of the land the home sits on, from county records.0.01
PoolWhether the property has a pool, and what kind, such as in-ground.No

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
South Grove Elementary SchoolA+
Elementary · Grades KG–5 · 0.9 mi
H
Syosset Senior High SchoolA+
High · Grades 9–12 · 1.5 mi
M
South Woods Middle SchoolA+
Middle · Grades 6–8 · 1.6 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

17 Dorcas 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 less than 89% of homes in Syosset 11791
  • Among the smallest lots in Syosset

What homes are worth in Syosset 11791

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

This home
$798K$3.7M

This home is worth more than 11% of homes in Syosset 11791.

How it measures up in Syosset 11791

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

Estimated value$935,961
CheaperTypical $1,234,085Pricier

Pricier than 11% of homes nearby

Lot size350 ft²
SmallerTypical 0.21 acBigger

Smaller than almost all homes nearby

How 17 Dorcas Ave ranks against every home in each area.
MeasureThis homeSyossetSyosset 11791Nassau County
Estimated valuepricier than$935,96113% of homes11% of homes64% of homes
Lot sizebigger than350 ft²almost no homesalmost no homesalmost no homes

About 17 Dorcas Ave

How much is 17 Dorcas Ave, Syosset, NY worth?

The TopHap Estimate for 17 Dorcas Ave, Syosset, NY is $935,961 as of Sep 24, 2026. The likely range is $695,599 to $1,176,323. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 17 Dorcas Ave, Syosset, NY last sell?

17 Dorcas Ave, Syosset, NY last sold on Apr 26, 2016 for $830,000, according to the county's recorded deed.

What schools serve 17 Dorcas Ave, Syosset, NY?

17 Dorcas Ave, Syosset, NY is assigned to South Grove Elementary School (elementary), rated A+; Syosset Senior High School (high), rated A+; South Woods Middle School (middle), rated A+. All sit in Syosset Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 17 Dorcas Ave, Syosset, NY compare to other homes in Syosset 11791?

Among the 8,086 homes in Syosset 11791, it is worth more than 11% of them ($935,961 against a typical $1,234,085) and its lot is bigger than almost none of them (350 ft² against a typical 0.21 ac). Measured against all of Nassau County, it is worth more than 64% 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 17 Dorcas Ave, Syosset, NY?

The 2025 property tax bill for 17 Dorcas Ave, Syosset, NY was $63. The county assessed it at $2.

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Assigned schools

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