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Single Family ResidenceResidential
$650,803$457 / 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 91How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $350,000 on Jun 7, 2002

21 ROCK AVE

WATCHUNG, NJ 07069
0
Baths
1,424 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.
0.19 ac
Lot SizeThe size of the land the home sits on, from county records.
1965
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$651K
$592K low$709K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$350,000 · Jun 7, 2002

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,664 (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.$580,800 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$345,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$235,700
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$546,300
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$580,800

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.44
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
19
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
68
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
93
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
43
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.3 in
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

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
CountySOMERSET
Lot (acres)The size of the land the home sits on, from county records.0.19
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

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.

M
Valley View SchoolA
Middle · Grades 5–8 · 0.4 mi
H
Watchung Hills Regional High SchoolB
High · Grades 9–12 · 1.6 mi
E
Bayberry SchoolB+
Elementary · Grades PK–4 · 2.1 mi

District: Watchung Borough School District

Neighborhood · ZIP 07069These 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.146
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.93
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.106

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.36%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.2%
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.7,301
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,171 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$149,740
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$202,595
Average tempThe average temperature here across a full year.51°F
Annual precipHow much rain and melted snow falls here in a typical year.50 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.56%

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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 Rock 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 95% of homes in Watchung 07069
  • Costs more per square foot than 91% of homes in Somerset County
  • Smaller than 93% of homes in Watchung 07069
  • Has a smaller lot than 96% of homes in Watchung 07069

What homes are worth in Watchung 07069

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

This home
$580K$2.5M

This home is worth more than 5% of homes in Watchung 07069.

How it measures up in Watchung 07069

The dot is this home. The mark in the middle is the typical home in Watchung 07069.

Estimated value$650,803
CheaperTypical $1,054,317Pricier

Pricier than 5% of homes nearby

Price per ft²$457
CheaperTypical $377Pricier

Pricier than 80% of homes nearby

Living area1,424 ft²
SmallerTypical 2,880 ft²Bigger

Bigger than 7% of homes nearby

Lot size0.19 ac
SmallerTypical 1.48 acBigger

Bigger than 4% of homes nearby

Year built1965
OlderTypical 1968Newer

Newer than 47% of homes nearby

How 21 Rock Ave ranks against every home in each area.
MeasureThis homeWatchung 07069Somerset County
Estimated valuepricier than$650,8035% of homes48% of homes
Price per ft²pricier than$45780% of homes91% of homes
Living areabigger than1,424 ft²7% of homes26% of homes
Lot sizebigger than0.19 ac4% of homes42% of homes
Year builtnewer than196547% of homes36% of homes

About 21 Rock Ave

How much is 21 Rock Ave, Watchung, NJ worth?

The TopHap Estimate for 21 Rock Ave, Watchung, NJ is $650,803 as of Oct 21, 2026. The likely range is $592,350 to $709,256. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Rock Ave, Watchung, NJ last sell?

21 Rock Ave, Watchung, NJ last sold on Jun 7, 2002 for $350,000, according to the county's recorded deed.

How big is 21 Rock Ave, Watchung, NJ?

21 Rock Ave, Watchung, NJ has 1,424 square feet of living space and a 0.19-acre lot.

When was 21 Rock Ave, Watchung, NJ built?

21 Rock Ave, Watchung, NJ was built in 1965, making it 61 years old. The building has 1 story.

What schools serve 21 Rock Ave, Watchung, NJ?

21 Rock Ave, Watchung, NJ is assigned to Valley View School (middle), rated A; Watchung Hills Regional High School (high), rated B; Bayberry School (elementary), rated B+. All sit in Watchung Borough School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Rock Ave, Watchung, NJ compare to other homes in Watchung 07069?

Among the 2,038 homes in Watchung 07069, it is worth more than 5% of them ($650,803 against a typical $1,054,317), its price per square foot is higher than 80% of them ($457 against a typical $377), it is bigger than 7% of them (1,424 ft² against a typical 2,880 ft²), its lot is bigger than 4% of them (0.19 ac against a typical 1.48 ac) and it is newer than 47% of them (1965 against a typical 1968). Measured against all of Somerset County, it is worth more than 48% 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 Rock Ave, Watchung, NJ?

The 2025 property tax bill for 21 Rock Ave, Watchung, NJ was $10,664. The county assessed it at $580,800.

More homes on Rock Ave

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Assigned schools

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