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Single Family ResidenceResidential
$549,446$333 / 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 Jul 14, 2026
Last sold for $285,000 on May 26, 2016

21 ROUND TOP DR

ANNANDALE, NJ 08801
0
Baths
1,649 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.
1.06 ac
Lot SizeThe size of the land the home sits on, from county records.
1952
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$549K
$513K low$586K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$285,000 · May 26, 2016
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.$292,946
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$234,357
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.46%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$256,500
COLDWELL BANKER HM LNS · recorded May 26, 2016

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,989 (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.$321,800 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$110,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$211,200
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$321,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$321,800

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyHUNTERDON
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(3)

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
Spruce Run Elementary School
Elementary · Grades PK–1 · 1.3 mi
M
Clinton Township Middle SchoolA-
Middle · Grades 7–8 · 1.5 mi
H
North Hunterdon High SchoolA-
High · Grades 9–12 · 2.2 mi

District: Clinton Township School District

Neighborhood · ZIP 08801These 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.71
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 100.89

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.33%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.6%
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.8,193
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.489 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$152,035
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$171,682
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 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.

  • Costs more per square foot than 87% of homes in Annandale 08801
  • Smaller than 70% of homes in Annandale 08801
  • Has a bigger lot than 65% of homes in Annandale 08801
  • Older than 89% of homes in Annandale 08801

What homes are worth in Annandale 08801

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

This home
$234K$1.3M

This home is worth more than 37% of homes in Annandale 08801.

How it measures up in Annandale 08801

The dot is this home. The mark in the middle is the typical home in Annandale 08801.

Estimated value$549,446
CheaperTypical $631,610Pricier

Pricier than 37% of homes nearby

Price per ft²$333
CheaperTypical $281Pricier

Pricier than 87% of homes nearby

Living area1,649 ft²
SmallerTypical 2,157 ft²Bigger

Bigger than 30% of homes nearby

Lot size1.06 ac
SmallerTypical 0.77 acBigger

Bigger than 65% of homes nearby

Year built1952
OlderTypical 1986Newer

Newer than 11% of homes nearby

How 21 Round Top Dr ranks against every home in each area.
MeasureThis homeAnnandale 08801Hunterdon County
Estimated valuepricier than$549,44637% of homes39% of homes
Price per ft²pricier than$33387% of homes76% of homes
Living areabigger than1,649 ft²30% of homes32% of homes
Lot sizebigger than1.06 ac65% of homes50% of homes
Year builtnewer than195211% of homes22% of homes

About 21 Round Top Dr

How much is 21 Round Top Dr, Annandale, NJ worth?

The TopHap Estimate for 21 Round Top Dr, Annandale, NJ is $549,446 as of Jul 14, 2026. The likely range is $513,111 to $585,781. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Round Top Dr, Annandale, NJ last sell?

21 Round Top Dr, Annandale, NJ last sold on May 26, 2016 for $285,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

When was 21 Round Top Dr, Annandale, NJ built?

21 Round Top Dr, Annandale, NJ was built in 1952, making it 74 years old. The building has 1 story.

What schools serve 21 Round Top Dr, Annandale, NJ?

21 Round Top Dr, Annandale, NJ is assigned to Spruce Run Elementary School (elementary); Clinton Township Middle School (middle), rated A-; North Hunterdon High School (high), rated A-. All sit in Clinton Township School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Round Top Dr, Annandale, NJ compare to other homes in Annandale 08801?

Among the 2,630 homes in Annandale 08801, it is worth more than 37% of them ($549,446 against a typical $631,610), its price per square foot is higher than 87% of them ($333 against a typical $281), it is bigger than 30% of them (1,649 ft² against a typical 2,157 ft²), its lot is bigger than 65% of them (1.06 ac against a typical 0.77 ac) and it is newer than 11% of them (1952 against a typical 1986). Measured against all of Hunterdon County, it is worth more than 39% 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 Dr, Annandale, NJ?

The 2025 property tax bill for 21 Round Top Dr, Annandale, NJ was $9,989. The county assessed it at $321,800.

More homes on Round Top Dr

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Assigned schools

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