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Single Family ResidenceResidential
$590,219$223 / 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 94How 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 PROSPECT AVE

ANDOVER, NJ 07821
0
Baths
2,641 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.
0.61 ac
Lot SizeThe size of the land the home sits on, from county records.
2
StoriesHow many floors the home has above ground.

Valuation

$590K
$553K low$627K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,626 (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.$322,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$102,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$219,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$322,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$322,000

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.40
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.
57
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.
30
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
StyleThe architectural style of the home, such as ranch or colonial.Colonial
CountySUSSEX
Lot (acres)The size of the land the home sits on, from county records.0.61
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

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

M
Long Pond Elementary SchoolB
Middle · Grades 5–8 · 3.9 mi
E
Florence M. Burd Elementary SchoolA
Elementary · Grades PK–4 · 4.3 mi
H
Newton High SchoolC-
High · Grades 9–12 · 4.5 mi

District: Newton Town School District

Neighborhood · ZIP 07821These 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.69
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.90
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.92

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.90%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.32%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.11,080
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.246 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$129,971
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$159,119
Average tempThe average temperature here across a full year.48°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 Prospect 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 more than 80% of homes in Sussex County
  • Costs less per square foot than 85% of homes in Andover 07821
  • Bigger than 87% of homes in Sussex County

What homes are worth in Andover 07821

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

This home
$153K$1M

This home is worth more than 66% of homes in Andover 07821.

How it measures up in Andover 07821

The dot is this home. The mark in the middle is the typical home in Andover 07821.

Estimated value$590,219
CheaperTypical $513,834Pricier

Pricier than 66% of homes nearby

Price per ft²$223
CheaperTypical $285Pricier

Pricier than 15% of homes nearby

Living area2,641 ft²
SmallerTypical 1,860 ft²Bigger

Bigger than 79% of homes nearby

Lot size0.61 ac
SmallerTypical 0.51 acBigger

Bigger than 56% of homes nearby

How 21 Prospect Ave ranks against every home in each area.
MeasureThis homeAndover 07821Sussex County
Estimated valuepricier than$590,21966% of homes80% of homes
Price per ft²pricier than$22315% of homes17% of homes
Living areabigger than2,641 ft²79% of homes87% of homes
Lot sizebigger than0.61 ac56% of homes64% of homes

About 21 Prospect Ave

How much is 21 Prospect Ave, Andover, NJ worth?

The TopHap Estimate for 21 Prospect Ave, Andover, NJ is $590,219 as of Jul 14, 2026. The likely range is $553,091 to $627,347. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Prospect Ave, Andover, NJ last sell?

21 Prospect Ave, Andover, NJ last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 21 Prospect Ave, Andover, NJ?

21 Prospect Ave, Andover, NJ has 2,641 square feet of living space and a 0.61-acre lot.

What schools serve 21 Prospect Ave, Andover, NJ?

21 Prospect Ave, Andover, NJ is assigned to Long Pond Elementary School (middle), rated B; Florence M. Burd Elementary School (elementary), rated A; Newton High School (high), rated C-. All sit in Newton Town School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Prospect Ave, Andover, NJ compare to other homes in Andover 07821?

Among the 3,729 homes in Andover 07821, it is worth more than 66% of them ($590,219 against a typical $513,834), its price per square foot is higher than 15% of them ($223 against a typical $285), it is bigger than 79% of them (2,641 ft² against a typical 1,860 ft²) and its lot is bigger than 56% of them (0.61 ac against a typical 0.51 ac). Measured against all of Sussex County, it is worth more than 80% 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 Prospect Ave, Andover, NJ?

The 2025 property tax bill for 21 Prospect Ave, Andover, NJ was $10,626. The county assessed it at $322,000.

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