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Single Family ResidenceResidential
$582,581$226 / 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
Last sold for $200,000 on Feb 26, 2015

339 ROCK AVE

PISCATAWAY, NJ 08854
0
Baths
2,579 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.
0.14 ac
Lot SizeThe size of the land the home sits on, from county records.
1914
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$583K
$533K low$633K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$200,000 · Feb 26, 2015
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.$582,581
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$466,065

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,690 (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.$570,300 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$250,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$319,700
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$483,300
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$570,300

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.14
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.

M
T. Schor Middle SchoolB-
Middle · Grades 6–8 · 2.3 mi
E
Grandview Elementary SchoolC
Elementary · Grades KG–3 · 2.3 mi
H
Piscataway High SchoolB-
High · Grades 9–12 · 3.5 mi

District: Piscataway Township School District

Neighborhood · ZIP 08854These 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.57
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 100.103

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.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.1%
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.63,382
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,298 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$116,616
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$138,705
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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
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

339 Rock 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.

  • Among the lowest price per square foot in Piscataway 08854
  • Bigger than 90% of homes in Piscataway 08854
  • Has a smaller lot than 73% of homes in Piscataway 08854
  • Older than 98% of homes in Piscataway 08854

What homes are worth in Piscataway 08854

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

This home
$337K$994K

This home is worth more than 50% of homes in Piscataway 08854.

How it measures up in Piscataway 08854

The dot is this home. The mark in the middle is the typical home in Piscataway 08854.

Estimated value$582,581
CheaperTypical $581,363Pricier

Pricier than 50% of homes nearby

Price per ft²$226
CheaperTypical $355Pricier

Cheaper than almost all homes nearby

Living area2,579 ft²
SmallerTypical 1,624 ft²Bigger

Bigger than 90% of homes nearby

Lot size0.14 ac
SmallerTypical 0.23 acBigger

Bigger than 27% of homes nearby

Year built1914
OlderTypical 1973Newer

Newer than 2% of homes nearby

How 339 Rock Ave ranks against every home in each area.
MeasureThis homePiscataway 08854Middlesex County
Estimated valuepricier than$582,58150% of homes50% of homes
Price per ft²pricier than$226almost no homes2% of homes
Living areabigger than2,579 ft²90% of homes86% of homes
Lot sizebigger than0.14 ac27% of homes44% of homes
Year builtnewer than19142% of homes5% of homes

About 339 Rock Ave

How much is 339 Rock Ave, Piscataway, NJ worth?

The TopHap Estimate for 339 Rock Ave, Piscataway, NJ is $582,581 as of Jul 14, 2026. The likely range is $532,630 to $632,532. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 339 Rock Ave, Piscataway, NJ last sell?

339 Rock Ave, Piscataway, NJ last sold on Feb 26, 2015 for $200,000, according to the county's recorded deed.

How big is 339 Rock Ave, Piscataway, NJ?

339 Rock Ave, Piscataway, NJ has 2,579 square feet of living space and a 0.14-acre lot.

When was 339 Rock Ave, Piscataway, NJ built?

339 Rock Ave, Piscataway, NJ was built in 1914, making it 112 years old. The building has 2 stories.

What schools serve 339 Rock Ave, Piscataway, NJ?

339 Rock Ave, Piscataway, NJ is assigned to T. Schor Middle School (middle), rated B-; Grandview Elementary School (elementary), rated C; Piscataway High School (high), rated B-. All sit in Piscataway Township School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 339 Rock Ave, Piscataway, NJ compare to other homes in Piscataway 08854?

Among the 13,708 homes in Piscataway 08854, it is worth more than 50% of them ($582,581 against a typical $581,363), its price per square foot is higher than almost none of them ($226 against a typical $355), it is bigger than 90% of them (2,579 ft² against a typical 1,624 ft²), its lot is bigger than 27% of them (0.14 ac against a typical 0.23 ac) and it is newer than 2% of them (1914 against a typical 1973). Measured against all of Middlesex County, it is worth more than 50% 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 339 Rock Ave, Piscataway, NJ?

The 2025 property tax bill for 339 Rock Ave, Piscataway, NJ was $8,690. The county assessed it at $570,300.

More homes on Rock Ave

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Assigned schools

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