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Single Family ResidenceResidential
$649,015$516 / 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

91 CORNWELL AVE

VALLEY STREAM, NY 11580
1.5
Baths
1,259 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.
0.1 ac
Lot SizeThe size of the land the home sits on, from county records.
1940
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$649K
$622K low$676K high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$649,015
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$519,212

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,787 (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.$419 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$172
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$247
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$420
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$419,000

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.48 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.0.2 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.Cape Cod
CountyNASSAU
Lot (acres)The size of the land the home sits on, from county records.0.10
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
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
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.

H
Valley Stream Central High SchoolA-
High · Grades 10–12 · 0.7 mi
M
Valley Stream Memorial Junior High SchoolC+
Middle · Grades 7–9 · 0.9 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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

91 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 less than 87% of homes in Nassau County
  • Smaller than 83% of homes in Nassau County
  • Has a smaller lot than 86% of homes in Nassau County
  • Older than 77% of homes in Nassau County

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 20% 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$649,015
CheaperTypical $717,571Pricier

Pricier than 20% of homes nearby

Price per ft²$516
CheaperTypical $508Pricier

Pricier than 54% of homes nearby

Living area1,259 ft²
SmallerTypical 1,404 ft²Bigger

Bigger than 28% of homes nearby

Lot size0.1 ac
SmallerTypical 0.12 acBigger

Bigger than 31% of homes nearby

Year built1940
OlderTypical 1949Newer

Newer than 24% of homes nearby

How 91 Cornwell Ave ranks against every home in each area.
MeasureThis homeValley Stream 11580Nassau County
Estimated valuepricier than$649,01520% of homes13% of homes
Price per ft²pricier than$51654% of homes48% of homes
Living areabigger than1,259 ft²28% of homes17% of homes
Lot sizebigger than0.1 ac31% of homes14% of homes
Year builtnewer than194024% of homes23% of homes

About 91 Cornwell Ave

How much is 91 Cornwell Ave, Valley Stream, NY worth?

The TopHap Estimate for 91 Cornwell Ave, Valley Stream, NY is $649,015 as of Jul 14, 2026. The likely range is $621,873 to $676,157. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 91 Cornwell Ave, Valley Stream, NY last sell?

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

How big is 91 Cornwell Ave, Valley Stream, NY?

91 Cornwell Ave, Valley Stream, NY has 1.5 bathrooms, 1,259 square feet of living space and a 0.10-acre lot.

When was 91 Cornwell Ave, Valley Stream, NY built?

91 Cornwell Ave, Valley Stream, NY was built in 1940, making it 86 years old. It is a cape cod home. The building has 1 story.

What schools serve 91 Cornwell Ave, Valley Stream, NY?

91 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 91 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 20% of them ($649,015 against a typical $717,571), its price per square foot is higher than 54% of them ($516 against a typical $508), it is bigger than 28% of them (1,259 ft² against a typical 1,404 ft²), its lot is bigger than 31% of them (0.1 ac against a typical 0.12 ac) and it is newer than 24% of them (1940 against a typical 1949). Measured against all of Nassau County, it is worth more than 13% 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 91 Cornwell Ave, Valley Stream, NY?

The 2025 property tax bill for 91 Cornwell Ave, Valley Stream, NY was $5,787. The county assessed it at $419.

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Closest homes

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Assigned schools

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