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Single Family ResidenceResidential
$510,999$292 / 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 Sep 24, 2026
Last sold for $120,000 on Dec 10, 2002

423 PROSPECT AVE

DUNELLEN, NJ 08812
0
Baths
1,750 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.
2,831 ft²
Lot SizeThe size of the land the home sits on, from county records.
1883
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$511K
$463K low$559K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$120,000 · Dec 10, 2002

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,666 (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.$479,300 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$101,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$377,700
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$435,700
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$479,300

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.43
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
13
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.
91
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.

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
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.07
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

Foreclosure Filings(2)

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

E
John P. Faber Elementary SchoolD+
Elementary · Grades PK–5 · 0.3 mi
M
Lincoln Middle SchoolD+
Middle · Grades 6–8 · 0.8 mi
H
Dunellen High SchoolD
High · Grades 9–12 · 0.8 mi

District: Dunellen Borough School District

Neighborhood · ZIP 08812These 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.121
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.96
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.102

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.13%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.7%
PopulationHow many people live in this area.15,513
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,931 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$123,698
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$147,053
Average tempThe average temperature here across a full year.52°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.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

423 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 less than 69% of homes in Dunellen 08812
  • Costs less per square foot than 86% of homes in Dunellen 08812
  • Has a smaller lot than 94% of homes in Dunellen 08812
  • Among the oldest homes in Middlesex County

What homes are worth in Dunellen 08812

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

This home
$361K$1.5M

This home is worth more than 31% of homes in Dunellen 08812.

How it measures up in Dunellen 08812

The dot is this home. The mark in the middle is the typical home in Dunellen 08812.

Estimated value$510,999
CheaperTypical $570,594Pricier

Pricier than 31% of homes nearby

Price per ft²$292
CheaperTypical $338Pricier

Pricier than 14% of homes nearby

Living area1,750 ft²
SmallerTypical 1,742 ft²Bigger

Bigger than 50% of homes nearby

Lot size2,831 ft²
SmallerTypical 0.24 acBigger

Bigger than 6% of homes nearby

Year built1883
OlderTypical 1956Newer

Older than almost all homes nearby

How 423 Prospect Ave ranks against every home in each area.
MeasureThis homeDunellen 08812Middlesex County
Estimated valuepricier than$510,99931% of homes33% of homes
Price per ft²pricier than$29214% of homes15% of homes
Living areabigger than1,750 ft²50% of homes58% of homes
Lot sizebigger than2,831 ft²6% of homes24% of homes
Year builtnewer than1883almost no homesalmost no homes

About 423 Prospect Ave

How much is 423 Prospect Ave, Dunellen, NJ worth?

The TopHap Estimate for 423 Prospect Ave, Dunellen, NJ is $510,999 as of Sep 24, 2026. The likely range is $462,504 to $559,494. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 423 Prospect Ave, Dunellen, NJ last sell?

423 Prospect Ave, Dunellen, NJ last sold on Dec 10, 2002 for $120,000, according to the county's recorded deed.

How big is 423 Prospect Ave, Dunellen, NJ?

423 Prospect Ave, Dunellen, NJ has 1,750 square feet of living space and a 0.07-acre lot.

When was 423 Prospect Ave, Dunellen, NJ built?

423 Prospect Ave, Dunellen, NJ was built in 1883, making it 143 years old. It is a colonial home. The building has 2 stories.

What schools serve 423 Prospect Ave, Dunellen, NJ?

423 Prospect Ave, Dunellen, NJ is assigned to John P. Faber Elementary School (elementary), rated D+; Lincoln Middle School (middle), rated D+; Dunellen High School (high), rated D. All sit in Dunellen Borough School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 423 Prospect Ave, Dunellen, NJ compare to other homes in Dunellen 08812?

Among the 4,191 homes in Dunellen 08812, it is worth more than 31% of them ($510,999 against a typical $570,594), its price per square foot is higher than 14% of them ($292 against a typical $338), it is bigger than 50% of them (1,750 ft² against a typical 1,742 ft²), its lot is bigger than 6% of them (2,831 ft² against a typical 0.24 ac) and it is newer than almost none of them (1883 against a typical 1956). Measured against all of Middlesex County, it is worth more than 33% 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 423 Prospect Ave, Dunellen, NJ?

The 2025 property tax bill for 423 Prospect Ave, Dunellen, NJ was $10,666. The county assessed it at $479,300.

More homes on Prospect Ave

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