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Single Family ResidenceResidential
$1,162,661
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 87How 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 RIDGE RD

COLD SPRING HARBOR, NY 11724
0
Baths
0.5 ac
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$1.2M
$1M low$1.3M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$16,160 (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.$4,400 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$4,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$977,778

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.50
PoolWhether the property has a pool, and what kind, such as in-ground.No

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

M
Cold Spring Harbor High SchoolA
Middle · Grades 7–12 · 0.5 mi
E
Goosehill Primary Center
Elementary · Grades KG–1 · 0.6 mi

District: Cold Spring Harbor Central School District

Neighborhood · ZIP 11724These 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.54
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.106
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.95

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.36%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.1.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.3,667
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.714 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$202,743
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$253,297
Average tempThe average temperature here across a full year.52°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.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 Ridge Rd 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 90% of homes in Cold Spring Harbor 11724
  • Has a bigger lot than 77% of homes in Suffolk County

What homes are worth in Cold Spring Harbor 11724

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

This home
$867K$5M

This home is worth more than 10% of homes in Cold Spring Harbor 11724.

How it measures up in Cold Spring Harbor 11724

The dot is this home. The mark in the middle is the typical home in Cold Spring Harbor 11724.

Estimated value$1,162,661
CheaperTypical $1,842,548Pricier

Pricier than 10% of homes nearby

Lot size0.5 ac
SmallerTypical 1.22 acBigger

Bigger than 36% of homes nearby

How 21 Ridge Rd ranks against every home in each area.
MeasureThis homeCold Spring HarborCold Spring Harbor 11724Suffolk County
Estimated valuepricier than$1,162,66144% of homes10% of homes84% of homes
Lot sizebigger than0.5 ac62% of homes36% of homes77% of homes

About 21 Ridge Rd

How much is 21 Ridge Rd, Cold Spring Harbor, NY worth?

The TopHap Estimate for 21 Ridge Rd, Cold Spring Harbor, NY is $1,162,661 as of Aug 30, 2026. The likely range is $1,012,690 to $1,312,632. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Ridge Rd, Cold Spring Harbor, NY last sell?

21 Ridge Rd, Cold Spring Harbor, NY last sold on Jan 1, 1900, according to the county's recorded deed.

What schools serve 21 Ridge Rd, Cold Spring Harbor, NY?

21 Ridge Rd, Cold Spring Harbor, NY is assigned to Cold Spring Harbor High School (middle), rated A; Goosehill Primary Center (elementary). All sit in Cold Spring Harbor Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Ridge Rd, Cold Spring Harbor, NY compare to other homes in Cold Spring Harbor 11724?

Among the 1,035 homes in Cold Spring Harbor 11724, it is worth more than 10% of them ($1,162,661 against a typical $1,842,548) and its lot is bigger than 36% of them (0.5 ac against a typical 1.22 ac). Measured against all of Suffolk County, it is worth more than 84% 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 Ridge Rd, Cold Spring Harbor, NY?

The 2024 property tax bill for 21 Ridge Rd, Cold Spring Harbor, NY was $16,160. The county assessed it at $4,400.

More homes on Ridge Rd

Closest homes

More homes in Cold Spring Harbor 11724

Assigned schools

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