Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$434,431$184 / 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 Sep 24, 2026
Last sold for $211,900 on Sep 6, 2002

21 DARTMOUTH DR

ROCK HILL, NY 12775
8
Beds
2.5
Baths
2,362 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.
0.27 ac
Lot SizeThe size of the land the home sits on, from county records.
2002
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
4
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$434K
$405K low$463K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$211,900 · Sep 6, 2002

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,211 (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.$212,500 (2025)
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.$177,500
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$212,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$523,399

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.0.27
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, Basement
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 · 140 ft²

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

M
Robert J Kaiser Middle SchoolD+
Middle · Grades 6–8 · 5.7 mi
H
Monticello High SchoolD+
High · Grades 9–12 · 5.8 mi
E
Emma C Chase SchoolB
Elementary · Grades KG–5 · 6.5 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

Do you own this home?
Claim this home

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 Dartmouth 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 more than 71% of homes in Sullivan County
  • Costs less per square foot than 84% of homes in Rock Hill 12775
  • Bigger than 83% of homes in Sullivan County
  • Has a smaller lot than 74% of homes in Sullivan County
  • Newer than 81% of homes in Sullivan County

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
$167K$861K

This home is worth more than 53% 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$434,431
CheaperTypical $421,965Pricier

Pricier than 53% of homes nearby

Price per ft²$184
CheaperTypical $226Pricier

Pricier than 16% of homes nearby

Living area2,362 ft²
SmallerTypical 1,658 ft²Bigger

Bigger than 77% of homes nearby

Lot size0.27 ac
SmallerTypical 0.33 acBigger

Bigger than 34% of homes nearby

Year built2002
OlderTypical 1973Newer

Newer than 79% of homes nearby

How 21 Dartmouth Dr ranks against every home in each area.
MeasureThis homeRock Hill 12775Sullivan County
Estimated valuepricier than$434,43153% of homes71% of homes
Price per ft²pricier than$18416% of homes34% of homes
Living areabigger than2,362 ft²77% of homes83% of homes
Lot sizebigger than0.27 ac34% of homes26% of homes
Year builtnewer than200279% of homes81% of homes

About 21 Dartmouth Dr

How much is 21 Dartmouth Dr, Rock Hill, NY worth?

The TopHap Estimate for 21 Dartmouth Dr, Rock Hill, NY is $434,431 as of Sep 24, 2026. The likely range is $405,415 to $463,447. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Dartmouth Dr, Rock Hill, NY last sell?

21 Dartmouth Dr, Rock Hill, NY last sold on Sep 6, 2002 for $211,900, according to the county's recorded deed.

How big is 21 Dartmouth Dr, Rock Hill, NY?

21 Dartmouth Dr, Rock Hill, NY has 8 bedrooms, 2.5 bathrooms, 2,362 square feet of living space and a 0.27-acre lot.

When was 21 Dartmouth Dr, Rock Hill, NY built?

21 Dartmouth Dr, Rock Hill, NY was built in 2002, making it 24 years old. It is a colonial home. The building has 2 stories.

What schools serve 21 Dartmouth Dr, Rock Hill, NY?

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

How does 21 Dartmouth Dr, 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 53% of them ($434,431 against a typical $421,965), its price per square foot is higher than 16% of them ($184 against a typical $226), it is bigger than 77% of them (2,362 ft² against a typical 1,658 ft²), its lot is bigger than 34% of them (0.27 ac against a typical 0.33 ac) and it is newer than 79% of them (2002 against a typical 1973). Measured against all of Sullivan County, it is worth more than 71% 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 Dartmouth Dr, Rock Hill, NY?

The 2025 property tax bill for 21 Dartmouth Dr, Rock Hill, NY was $10,211. The county assessed it at $212,500.

More homes on Dartmouth Dr

Closest homes

More homes in Rock Hill 12775

Assigned schools

Explore the area

See this home in context

Open 21 Dartmouth Dr on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map