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Single Family ResidenceResidential
$692,788$662 / 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 93How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026

21 LILLIAN DR

CHESTNUT RIDGE, NY 10977
3
Beds
1
Baths
1,046 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.
0.59 ac
Lot SizeThe size of the land the home sits on, from county records.
1960
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$693K
$642K low$744K high

Tax & Assessment

Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$50,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$18,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$32,400
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$50,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$675,066

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.43
10
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
6
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
64
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
90
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
47
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.6 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%

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
CountyRockland
Lot (acres)The size of the land the home sits on, from county records.0.59
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.Above-Ground Pool
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 200 ft²Porch · 117 ft²

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

M
Chestnut Ridge Middle SchoolC-
Middle · Grades 7–8 · 1.3 mi
E
Fleetwood Elementary SchoolF
Elementary · Grades KG–3 · 1.3 mi
H
Spring Valley High SchoolD-
High · Grades 9–12 · 2.0 mi

District: East Ramapo Central School District (Spring Valley)

Neighborhood · ZIP 10977These 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.93
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 100.112

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.15%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.29%
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.71,017
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.6,361 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$76,385
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$106,289
Average tempThe average temperature here across a full year.51°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.52%

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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 Lillian Dr 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 82% of homes in Spring Valley 10977
  • Costs more per square foot than 98% of homes in Rockland County
  • Smaller than 94% of homes in Spring Valley 10977
  • Has a bigger lot than 81% of homes in Spring Valley 10977
  • Older than 79% of homes in Spring Valley 10977

What homes are worth in Spring Valley 10977

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

This home
$322K$1.7M

This home is worth more than 18% of homes in Spring Valley 10977.

How it measures up in Spring Valley 10977

The dot is this home. The mark in the middle is the typical home in Spring Valley 10977.

Estimated value$692,788
CheaperTypical $894,437Pricier

Pricier than 18% of homes nearby

Price per ft²$662
CheaperTypical $427Pricier

Pricier than 94% of homes nearby

Living area1,046 ft²
SmallerTypical 2,148 ft²Bigger

Bigger than 6% of homes nearby

Lot size0.59 ac
SmallerTypical 0.24 acBigger

Bigger than 81% of homes nearby

Year built1960
OlderTypical 1974Newer

Newer than 21% of homes nearby

How 21 Lillian Dr ranks against every home in each area.
MeasureThis homeSpring Valley 10977Rockland County
Estimated valuepricier than$692,78818% of homes41% of homes
Price per ft²pricier than$66294% of homes98% of homes
Living areabigger than1,046 ft²6% of homes8% of homes
Lot sizebigger than0.59 ac81% of homes78% of homes
Year builtnewer than196021% of homes31% of homes

About 21 Lillian Dr

How much is 21 Lillian Dr, Chestnut Ridge, NY worth?

The TopHap Estimate for 21 Lillian Dr, Chestnut Ridge, NY is $692,788 as of Aug 30, 2026. The likely range is $641,910 to $743,666. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 21 Lillian Dr, Chestnut Ridge, NY?

21 Lillian Dr, Chestnut Ridge, NY has 3 bedrooms, 1 bathrooms, 1,046 square feet of living space and a 0.59-acre lot.

When was 21 Lillian Dr, Chestnut Ridge, NY built?

21 Lillian Dr, Chestnut Ridge, NY was built in 1960, making it 66 years old. It is a ranch home. The building has 1 story.

What schools serve 21 Lillian Dr, Chestnut Ridge, NY?

21 Lillian Dr, Chestnut Ridge, NY is assigned to Chestnut Ridge Middle School (middle), rated C-; Fleetwood Elementary School (elementary), rated F; Spring Valley High School (high), rated D-. All sit in East Ramapo Central School District (Spring Valley). Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Lillian Dr, Chestnut Ridge, NY compare to other homes in Spring Valley 10977?

Among the 10,964 homes in Spring Valley 10977, it is worth more than 18% of them ($692,788 against a typical $894,437), its price per square foot is higher than 94% of them ($662 against a typical $427), it is bigger than 6% of them (1,046 ft² against a typical 2,148 ft²), its lot is bigger than 81% of them (0.59 ac against a typical 0.24 ac) and it is newer than 21% of them (1960 against a typical 1974). Measured against all of Rockland County, it is worth more than 41% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

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