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Single Family ResidenceResidential
$424,882$385 / 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 89How 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

423 MOUNTAIN AVE

PLAINFIELD, NJ 07062
0
Baths
1,105 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.
0.23 ac
Lot SizeThe size of the land the home sits on, from county records.
1951
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$425K
$378K low$472K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,405 (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.$185,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$100,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$85,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$185,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$185,000

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.43
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
17
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.
90
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
Lot (acres)The size of the land the home sits on, from county records.0.23
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.

E
East End Elementary SchoolC+
Elementary · Grades PK–4 · 0.4 mi
H
North Plainfield High SchoolD
High · Grades 9–12 · 1.4 mi
M
North Plainfield Middle SchoolC
Middle · Grades 7–8 · 1.4 mi

District: North Plainfield Borough School District

Neighborhood · ZIP 07062These 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.96
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.95
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.104

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.23%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.12%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.6%
PopulationHow many people live in this area.14,346
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.7,600 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$93,403
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$111,888
Average tempThe average temperature here across a full year.52°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

423 Mountain 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 87% of homes in Somerset County
  • Costs more per square foot than 68% of homes in Somerset County
  • Smaller than 90% of homes in Somerset County
  • Has a bigger lot than 73% of homes in Plainfield 07062
  • Older than 82% of homes in Somerset County

What homes are worth in Plainfield 07062

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

This home
$176K$764K

This home is worth more than 17% of homes in Plainfield 07062.

How it measures up in Plainfield 07062

The dot is this home. The mark in the middle is the typical home in Plainfield 07062.

Estimated value$424,882
CheaperTypical $514,632Pricier

Pricier than 17% of homes nearby

Price per ft²$385
CheaperTypical $366Pricier

Pricier than 56% of homes nearby

Living area1,105 ft²
SmallerTypical 1,364 ft²Bigger

Bigger than 34% of homes nearby

Lot size0.23 ac
SmallerTypical 0.17 acBigger

Bigger than 73% of homes nearby

Year built1951
OlderTypical 1946Newer

Newer than 71% of homes nearby

How 423 Mountain Ave ranks against every home in each area.
MeasureThis homePlainfield 07062Somerset County
Estimated valuepricier than$424,88217% of homes13% of homes
Price per ft²pricier than$38556% of homes68% of homes
Living areabigger than1,105 ft²34% of homes10% of homes
Lot sizebigger than0.23 ac73% of homes49% of homes
Year builtnewer than195171% of homes18% of homes

About 423 Mountain Ave

How much is 423 Mountain Ave, Plainfield, NJ worth?

The TopHap Estimate for 423 Mountain Ave, Plainfield, NJ is $424,882 as of Sep 24, 2026. The likely range is $377,531 to $472,233. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 423 Mountain Ave, Plainfield, NJ last sell?

423 Mountain Ave, Plainfield, NJ last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 423 Mountain Ave, Plainfield, NJ?

423 Mountain Ave, Plainfield, NJ has 1,105 square feet of living space and a 0.23-acre lot.

When was 423 Mountain Ave, Plainfield, NJ built?

423 Mountain Ave, Plainfield, NJ was built in 1951, making it 75 years old. The building has 1 story.

What schools serve 423 Mountain Ave, Plainfield, NJ?

423 Mountain Ave, Plainfield, NJ is assigned to East End Elementary School (elementary), rated C+; North Plainfield High School (high), rated D; North Plainfield Middle School (middle), rated C. All sit in North Plainfield Borough School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 423 Mountain Ave, Plainfield, NJ compare to other homes in Plainfield 07062?

Among the 3,503 homes in Plainfield 07062, it is worth more than 17% of them ($424,882 against a typical $514,632), its price per square foot is higher than 56% of them ($385 against a typical $366), it is bigger than 34% of them (1,105 ft² against a typical 1,364 ft²), its lot is bigger than 73% of them (0.23 ac against a typical 0.17 ac) and it is newer than 71% of them (1951 against a typical 1946). Measured against all of Somerset County, it is worth more than 13% 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 Mountain Ave, Plainfield, NJ?

The 2025 property tax bill for 423 Mountain Ave, Plainfield, NJ was $8,405. The county assessed it at $185,000.

More homes on Mountain Ave

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Assigned schools

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