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Single Family ResidenceResidential
$467,821$203 / 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 90How 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 CHELSEA LN

ROCK HILL, NY 12775
3
Beds
3 / 1
Baths
2,309 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.
0.41 ac
Lot SizeThe size of the land the home sits on, from county records.
2003
Year BuiltThe year the home was originally built, according to county records.
2
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.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$468K
$421K low$515K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,462 (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.$241,400 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$35,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$206,400
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$241,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$536,444

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.Colonial
CountySullivan
Lot (acres)The size of the land the home sits on, from county records.0.41
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Mat/Raft Foundation (Slab)
HeatingThe type of heating system in the home.Hot Water
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, Attached
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.Patio · 192 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
Emma C Chase SchoolB
Elementary · Grades KG–5 · 5.1 mi
M
Robert J Kaiser Middle SchoolD+
Middle · Grades 6–8 · 7.2 mi
H
Monticello High SchoolD+
High · Grades 9–12 · 7.3 mi

District: Monticello Central School District

Neighborhood · ZIP 12775These 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.81
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.99
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.60

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.66%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.28%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.2,382
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.168 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$111,553
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$154,086
Average tempThe average temperature here across a full year.47°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%

Owner Tools

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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 Chelsea Ln 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 more than 76% of homes in Sullivan County
  • Costs less per square foot than 72% of homes in Rock Hill 12775
  • Bigger than 82% of homes in Sullivan County
  • Has a smaller lot than 65% of homes in Sullivan County
  • Newer than 82% of homes in Rock Hill 12775

What homes are worth in Rock Hill 12775

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

This home
$170K$1M

This home is worth more than 59% of homes in Rock Hill 12775.

How it measures up in Rock Hill 12775

The dot is this home. The mark in the middle is the typical home in Rock Hill 12775.

Estimated value$467,821
CheaperTypical $428,357Pricier

Pricier than 59% of homes nearby

Price per ft²$203
CheaperTypical $228Pricier

Pricier than 28% of homes nearby

Living area2,309 ft²
SmallerTypical 1,663 ft²Bigger

Bigger than 75% of homes nearby

Lot size0.41 ac
SmallerTypical 0.33 acBigger

Bigger than 63% of homes nearby

Year built2003
OlderTypical 1973Newer

Newer than 82% of homes nearby

How 21 Chelsea Ln ranks against every home in each area.
MeasureThis homeRock Hill 12775Sullivan County
Estimated valuepricier than$467,82159% of homes76% of homes
Price per ft²pricier than$20328% of homes44% of homes
Living areabigger than2,309 ft²75% of homes82% of homes
Lot sizebigger than0.41 ac63% of homes35% of homes
Year builtnewer than200382% of homes82% of homes

About 21 Chelsea Ln

How much is 21 Chelsea Ln, Rock Hill, NY worth?

The TopHap Estimate for 21 Chelsea Ln, Rock Hill, NY is $467,821 as of Aug 30, 2026. The likely range is $421,136 to $514,506. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Chelsea Ln, Rock Hill, NY last sell?

21 Chelsea Ln, Rock Hill, NY last sold on Feb 17, 2021, according to the county's recorded deed.

How big is 21 Chelsea Ln, Rock Hill, NY?

21 Chelsea Ln, Rock Hill, NY has 3 bedrooms, 3 bathrooms, 2,309 square feet of living space and a 0.41-acre lot.

When was 21 Chelsea Ln, Rock Hill, NY built?

21 Chelsea Ln, Rock Hill, NY was built in 2003, making it 23 years old. It is a colonial home. The building has 2 stories.

What schools serve 21 Chelsea Ln, Rock Hill, NY?

21 Chelsea Ln, Rock Hill, NY is assigned to Emma C Chase School (elementary), rated B; Robert J Kaiser Middle School (middle), rated D+; Monticello High School (high), rated D+. All sit in Monticello Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Chelsea Ln, Rock Hill, NY compare to other homes in Rock Hill 12775?

Among the 1,778 homes in Rock Hill 12775, it is worth more than 59% of them ($467,821 against a typical $428,357), its price per square foot is higher than 28% of them ($203 against a typical $228), it is bigger than 75% of them (2,309 ft² against a typical 1,663 ft²), its lot is bigger than 63% of them (0.41 ac against a typical 0.33 ac) and it is newer than 82% of them (2003 against a typical 1973). Measured against all of Sullivan County, it is worth more than 76% 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 Chelsea Ln, Rock Hill, NY?

The 2024 property tax bill for 21 Chelsea Ln, Rock Hill, NY was $10,462. The county assessed it at $241,400.

More homes on Chelsea Ln

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