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Single Family ResidenceResidential
$835,596$493 / 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 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026

170 CORNWELL AVE

VALLEY STREAM, NY 11580
1
Baths
1,696 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.
0.31 ac
Lot SizeThe size of the land the home sits on, from county records.
1949
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$836K
$806K low$865K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,233 (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.$501 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$283
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$218
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$511
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$501,000

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.36 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.52%
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.1 percent flood zone

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
CountyNASSAU
Lot (acres)The size of the land the home sits on, from county records.0.31
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
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 278 ft²

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

H
Valley Stream Central High SchoolA-
High · Grades 10–12 · 0.7 mi
M
Valley Stream Memorial Junior High SchoolC+
Middle · Grades 7–9 · 0.8 mi

District: Valley Stream Central High School District

Neighborhood · ZIP 11580These 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.63
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.111
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.94

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.26%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.43,040
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.11,017 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$129,895
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$156,272
Average tempThe average temperature here across a full year.54°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

170 Cornwell 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 86% of homes in Valley Stream 11580
  • Bigger than 74% of homes in Valley Stream 11580
  • Has a bigger lot than 98% of homes in Valley Stream 11580

What homes are worth in Valley Stream 11580

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

This home
$492K$1.1M

This home is worth more than 86% of homes in Valley Stream 11580.

How it measures up in Valley Stream 11580

The dot is this home. The mark in the middle is the typical home in Valley Stream 11580.

Estimated value$835,596
CheaperTypical $716,267Pricier

Pricier than 86% of homes nearby

Price per ft²$493
CheaperTypical $507Pricier

Pricier than 42% of homes nearby

Living area1,696 ft²
SmallerTypical 1,409 ft²Bigger

Bigger than 74% of homes nearby

Lot size0.31 ac
SmallerTypical 0.12 acBigger

Bigger than 98% of homes nearby

Year built1949
OlderTypical 1949Newer

Newer than 53% of homes nearby

How 170 Cornwell Ave ranks against every home in each area.
MeasureThis homeValley Stream 11580Nassau County
Estimated valuepricier than$835,59686% of homes51% of homes
Price per ft²pricier than$49342% of homes41% of homes
Living areabigger than1,696 ft²74% of homes48% of homes
Lot sizebigger than0.31 ac98% of homes91% of homes
Year builtnewer than194953% of homes37% of homes

About 170 Cornwell Ave

How much is 170 Cornwell Ave, Valley Stream, NY worth?

The TopHap Estimate for 170 Cornwell Ave, Valley Stream, NY is $835,596 as of Jul 14, 2026. The likely range is $806,222 to $864,970. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 170 Cornwell Ave, Valley Stream, NY last sell?

170 Cornwell Ave, Valley Stream, NY last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 170 Cornwell Ave, Valley Stream, NY?

170 Cornwell Ave, Valley Stream, NY has 1 bathrooms, 1,696 square feet of living space and a 0.31-acre lot.

When was 170 Cornwell Ave, Valley Stream, NY built?

170 Cornwell Ave, Valley Stream, NY was built in 1949, making it 77 years old. It is a ranch home. The building has 1 story.

What schools serve 170 Cornwell Ave, Valley Stream, NY?

170 Cornwell Ave, Valley Stream, NY is assigned to Valley Stream Central High School (high), rated A-; Valley Stream Memorial Junior High School (middle), rated C+. All sit in Valley Stream Central High School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 170 Cornwell Ave, Valley Stream, NY compare to other homes in Valley Stream 11580?

Among the 10,974 homes in Valley Stream 11580, it is worth more than 86% of them ($835,596 against a typical $716,267), its price per square foot is higher than 42% of them ($493 against a typical $507), it is bigger than 74% of them (1,696 ft² against a typical 1,409 ft²), its lot is bigger than 98% of them (0.31 ac against a typical 0.12 ac) and it is newer than 53% of them (1949 against a typical 1949). Measured against all of Nassau 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 170 Cornwell Ave, Valley Stream, NY?

The 2025 property tax bill for 170 Cornwell Ave, Valley Stream, NY was $9,233. The county assessed it at $501.

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