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Single Family ResidenceResidential
$333,142$270 / 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 Sep 24, 2026
Last sold for $155,000 on Oct 24, 2001

21 RIVER AVE

CORNWALL ON HUDSON, NY 12520
3
Beds
1
Baths
1,232 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.
3,049 ft²
Lot SizeThe size of the land the home sits on, from county records.
1861
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

$333K
$317K low$350K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$155,000 · Oct 24, 2001

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,330 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$181,200 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$76,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$104,600
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$181,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$286,600

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyORANGE
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1950
Lot (acres)The size of the land the home sits on, from county records.0.07
HeatingThe type of heating system in the home.Hot Water
PoolWhether the property has a pool, and what kind, such as in-ground.No
ViewThe type of view from the property, or another feature of the site that affects value.Suburban
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 125 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.

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

E
Cornwall-on-Hudson Elementary SchoolA
Elementary · Grades KG–4 · 0.1 mi
M
Cornwall Middle SchoolA
Middle · Grades 5–8 · 0.8 mi
H
Cornwall Central High SchoolA-
High · Grades 9–12 · 3.0 mi

District: Cornwall Central School District

Neighborhood · ZIP 12520These 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.94
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.101
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.88

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.21%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.0%
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.2,573
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.543 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$110,187
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$137,291
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.51 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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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

21 River 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 97% of homes in Cornwall on Hudson 12520
  • Costs less per square foot than 76% of homes in Cornwall on Hudson 12520
  • Smaller than 87% of homes in Cornwall on Hudson 12520
  • Among the smallest lots in Cornwall on Hudson 12520
  • Older than 98% of homes in Orange County

What homes are worth in Cornwall on Hudson 12520

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

This home
$314K$1.2M

This home is worth more than 3% of homes in Cornwall on Hudson 12520.

How it measures up in Cornwall on Hudson 12520

The dot is this home. The mark in the middle is the typical home in Cornwall on Hudson 12520.

Estimated value$333,142
CheaperTypical $540,023Pricier

Pricier than 3% of homes nearby

Price per ft²$270
CheaperTypical $304Pricier

Pricier than 24% of homes nearby

Living area1,232 ft²
SmallerTypical 1,874 ft²Bigger

Bigger than 13% of homes nearby

Lot size3,049 ft²
SmallerTypical 0.29 acBigger

Smaller than almost all homes nearby

Year built1861
OlderTypical 1950Newer

Newer than 6% of homes nearby

How 21 River Ave ranks against every home in each area.
MeasureThis homeCornwall on Hudson 12520Orange County
Estimated valuepricier than$333,1423% of homes20% of homes
Price per ft²pricier than$27024% of homes55% of homes
Living areabigger than1,232 ft²13% of homes20% of homes
Lot sizebigger than3,049 ft²almost no homes17% of homes
Year builtnewer than18616% of homes2% of homes

About 21 River Ave

How much is 21 River Ave, Cornwall On Hudson, NY worth?

The TopHap Estimate for 21 River Ave, Cornwall On Hudson, NY is $333,142 as of Sep 24, 2026. The likely range is $316,554 to $349,730. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 River Ave, Cornwall On Hudson, NY last sell?

21 River Ave, Cornwall On Hudson, NY last sold on Oct 24, 2001 for $155,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 21 River Ave, Cornwall On Hudson, NY?

21 River Ave, Cornwall On Hudson, NY has 3 bedrooms, 1 bathrooms, 1,232 square feet of living space and a 0.07-acre lot.

When was 21 River Ave, Cornwall On Hudson, NY built?

21 River Ave, Cornwall On Hudson, NY was built in 1861, making it 165 years old. The building has 2 stories.

What schools serve 21 River Ave, Cornwall On Hudson, NY?

21 River Ave, Cornwall On Hudson, NY is assigned to Cornwall-on-Hudson Elementary School (elementary), rated A; Cornwall Middle School (middle), rated A; Cornwall Central High School (high), rated A-. All sit in Cornwall Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 River Ave, Cornwall On Hudson, NY compare to other homes in Cornwall on Hudson 12520?

Among the 1,132 homes in Cornwall on Hudson 12520, it is worth more than 3% of them ($333,142 against a typical $540,023), its price per square foot is higher than 24% of them ($270 against a typical $304), it is bigger than 13% of them (1,232 ft² against a typical 1,874 ft²), its lot is bigger than almost none of them (3,049 ft² against a typical 0.29 ac) and it is newer than 6% of them (1861 against a typical 1950). Measured against all of Orange County, it is worth more than 20% 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 21 River Ave, Cornwall On Hudson, NY?

The 2024 property tax bill for 21 River Ave, Cornwall On Hudson, NY was $7,330. The county assessed it at $181,200.

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