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Single Family ResidenceResidential
$1,347,306$331 / 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 Jul 14, 2026

21 ROUND TOP RD

WARREN, NJ 07059
0
Baths
4,075 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.
2.3 ac
Lot SizeThe size of the land the home sits on, from county records.
1990
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.3M
$1.2M low$1.5M high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$1,347,306
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$1,077,845

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$19,386 (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.$1,177,100 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$461,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$715,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,106,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,177,100

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.45
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.
67
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
96
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.
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
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.

E
Mount Horeb SchoolB+
Elementary · Grades PK–5 · 0.5 mi
M
Warren Middle SchoolA
Middle · Grades 6–8 · 3.4 mi
H
Watchung Hills Regional High SchoolA
High · Grades 9–12 · 4.2 mi

District: Warren Township School District

Neighborhood · ZIP 07059These 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.1
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.94
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.101

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.37%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.9%
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.16,351
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.835 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$177,945
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$258,634
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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.No

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 Round Top 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 more than 92% of homes in Somerset County
  • Costs less per square foot than 82% of homes in Warren 07059
  • Bigger than 94% of homes in Somerset County
  • Has a bigger lot than 95% of homes in Somerset County
  • Newer than 71% of homes in Somerset County

What homes are worth in Warren 07059

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

This home
$302K$2.6M

This home is worth more than 68% of homes in Warren 07059.

How it measures up in Warren 07059

The dot is this home. The mark in the middle is the typical home in Warren 07059.

Estimated value$1,347,306
CheaperTypical $1,121,589Pricier

Pricier than 68% of homes nearby

Price per ft²$331
CheaperTypical $397Pricier

Pricier than 18% of homes nearby

Living area4,075 ft²
SmallerTypical 2,984 ft²Bigger

Bigger than 78% of homes nearby

Lot size2.3 ac
SmallerTypical 1.5 acBigger

Bigger than 90% of homes nearby

Year built1990
OlderTypical 1984Newer

Newer than 61% of homes nearby

How 21 Round Top Rd ranks against every home in each area.
MeasureThis homeWarren 07059Somerset County
Estimated valuepricier than$1,347,30668% of homes92% of homes
Price per ft²pricier than$33118% of homes38% of homes
Living areabigger than4,075 ft²78% of homes94% of homes
Lot sizebigger than2.3 ac90% of homes95% of homes
Year builtnewer than199061% of homes71% of homes

About 21 Round Top Rd

How much is 21 Round Top Rd, Warren, NJ worth?

The TopHap Estimate for 21 Round Top Rd, Warren, NJ is $1,347,306 as of Jul 14, 2026. The likely range is $1,224,180 to $1,470,432. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Round Top Rd, Warren, NJ last sell?

21 Round Top Rd, Warren, NJ last sold on Jan 1, 1900, according to the county's recorded deed.

When was 21 Round Top Rd, Warren, NJ built?

21 Round Top Rd, Warren, NJ was built in 1990, making it 36 years old. The building has 2 stories.

What schools serve 21 Round Top Rd, Warren, NJ?

21 Round Top Rd, Warren, NJ is assigned to Mount Horeb School (elementary), rated B+; Warren Middle School (middle), rated A; Watchung Hills Regional High School (high), rated A. All sit in Warren Township School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Round Top Rd, Warren, NJ compare to other homes in Warren 07059?

Among the 5,682 homes in Warren 07059, it is worth more than 68% of them ($1,347,306 against a typical $1,121,589), its price per square foot is higher than 18% of them ($331 against a typical $397), it is bigger than 78% of them (4,075 ft² against a typical 2,984 ft²), its lot is bigger than 90% of them (2.3 ac against a typical 1.5 ac) and it is newer than 61% of them (1990 against a typical 1984). Measured against all of Somerset County, it is worth more than 92% 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 Round Top Rd, Warren, NJ?

The 2025 property tax bill for 21 Round Top Rd, Warren, NJ was $19,386. The county assessed it at $1,177,100.

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Assigned schools

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