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Single Family ResidenceResidential
$694,438$440 / 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 95How 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
Last sold for $225,000 on Feb 2, 2000

664 RIVERSIDE AVE

BALDWIN, NY 11510
1.5
Baths
1,580 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.
0.13 ac
Lot SizeThe size of the land the home sits on, from county records.
1924
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$694K
$663K low$726K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$225,000 · Feb 2, 2000
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.$466,938
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$373,550
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.34%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$202,500
SUNMARK FCU · recorded Feb 2, 2000
2nd MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$25,000
SPERRY ASSOCIATES FCU

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$13,748 (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.$481 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$182
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$299
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$481
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$481,000

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.86 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.90%
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
CountyNASSAU
Lot (acres)The size of the land the home sits on, from county records.0.13
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, Detached
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 · 84 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 11510These 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.73
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.113
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.24%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.8%
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.34,663
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.7,243 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$133,415
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$171,718
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

664 Riverside 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 79% of homes in Nassau County
  • Costs less per square foot than 78% of homes in Nassau County
  • Has a smaller lot than 72% of homes in Nassau County
  • Older than 92% of homes in Nassau County

What homes are worth in Baldwin 11510

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

This home
$486K$995K

This home is worth more than 47% of homes in Baldwin 11510.

How it measures up in Baldwin 11510

The dot is this home. The mark in the middle is the typical home in Baldwin 11510.

Estimated value$694,438
CheaperTypical $700,650Pricier

Pricier than 47% of homes nearby

Price per ft²$440
CheaperTypical $437Pricier

Pricier than 52% of homes nearby

Living area1,580 ft²
SmallerTypical 1,619 ft²Bigger

Bigger than 47% of homes nearby

Lot size0.13 ac
SmallerTypical 0.14 acBigger

Bigger than 33% of homes nearby

Year built1924
OlderTypical 1942Newer

Newer than 15% of homes nearby

How 664 Riverside Ave ranks against every home in each area.
MeasureThis homeBaldwinBaldwin 11510Nassau County
Estimated valuepricier than$694,43855% of homes47% of homes21% of homes
Price per ft²pricier than$44048% of homes52% of homes22% of homes
Living areabigger than1,580 ft²52% of homes47% of homes40% of homes
Lot sizebigger than0.13 ac36% of homes33% of homes28% of homes
Year builtnewer than192417% of homes15% of homes8% of homes

About 664 Riverside Ave

How much is 664 Riverside Ave, Baldwin, NY worth?

The TopHap Estimate for 664 Riverside Ave, Baldwin, NY is $694,438 as of Jul 14, 2026. The likely range is $662,959 to $725,917. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 664 Riverside Ave, Baldwin, NY last sell?

664 Riverside Ave, Baldwin, NY last sold on Feb 2, 2000 for $225,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 664 Riverside Ave, Baldwin, NY?

664 Riverside Ave, Baldwin, NY has 1.5 bathrooms, 1,580 square feet of living space and a 0.13-acre lot.

When was 664 Riverside Ave, Baldwin, NY built?

664 Riverside Ave, Baldwin, NY was built in 1924, making it 102 years old. The building has 2 stories.

How does 664 Riverside Ave, Baldwin, NY compare to other homes in Baldwin 11510?

Among the 9,636 homes in Baldwin 11510, it is worth more than 47% of them ($694,438 against a typical $700,650), its price per square foot is higher than 52% of them ($440 against a typical $437), it is bigger than 47% of them (1,580 ft² against a typical 1,619 ft²), its lot is bigger than 33% of them (0.13 ac against a typical 0.14 ac) and it is newer than 15% of them (1924 against a typical 1942). Measured against all of Nassau County, it is worth more than 21% 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 664 Riverside Ave, Baldwin, NY?

The 2025 property tax bill for 664 Riverside Ave, Baldwin, NY was $13,748. The county assessed it at $481.

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