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Single Family ResidenceResidential
$529,999$357 / 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
Last sold for $410,000 on Feb 23, 2023

421 ROCK AVE

PISCATAWAY, NJ 08854
0
Baths
1,485 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.
0.21 ac
Lot SizeThe size of the land the home sits on, from county records.
1953
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$530K
$500K low$560K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$410,000 · Feb 23, 2023
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.$144,599
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$115,679
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.74%
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.$385,400
FAMILY FIRST FUNDING LLC · recorded Feb 23, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,962 (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.$590,700 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$286,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$304,400
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$442,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$590,700

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.0.21
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Basement
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(4)

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 · 2.2 mi
E
Grandview Elementary SchoolC
Elementary · Grades KG–3 · 2.3 mi
H
Piscataway High SchoolB-
High · Grades 9–12 · 3.4 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

421 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.

  • Worth less than 65% of homes in Piscataway 08854
  • Has a bigger lot than 68% of homes in Middlesex County
  • Older than 83% 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
$346K$1M

This home is worth more than 35% 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$529,999
CheaperTypical $584,279Pricier

Pricier than 35% of homes nearby

Price per ft²$357
CheaperTypical $356Pricier

Pricier than 51% of homes nearby

Living area1,485 ft²
SmallerTypical 1,626 ft²Bigger

Bigger than 38% of homes nearby

Lot size0.21 ac
SmallerTypical 0.23 acBigger

Bigger than 45% of homes nearby

Year built1953
OlderTypical 1973Newer

Newer than 17% of homes nearby

How 421 Rock Ave ranks against every home in each area.
MeasureThis homePiscataway 08854Middlesex County
Estimated valuepricier than$529,99935% of homes37% of homes
Price per ft²pricier than$35751% of homes48% of homes
Living areabigger than1,485 ft²38% of homes40% of homes
Lot sizebigger than0.21 ac45% of homes68% of homes
Year builtnewer than195317% of homes29% of homes

About 421 Rock Ave

How much is 421 Rock Ave, Piscataway, NJ worth?

The TopHap Estimate for 421 Rock Ave, Piscataway, NJ is $529,999 as of Jul 14, 2026. The likely range is $500,459 to $559,539. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 421 Rock Ave, Piscataway, NJ last sell?

421 Rock Ave, Piscataway, NJ last sold on Feb 23, 2023 for $410,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 421 Rock Ave, Piscataway, NJ?

421 Rock Ave, Piscataway, NJ has 1,485 square feet of living space and a 0.21-acre lot.

When was 421 Rock Ave, Piscataway, NJ built?

421 Rock Ave, Piscataway, NJ was built in 1953, making it 73 years old. The building has 1 story.

What schools serve 421 Rock Ave, Piscataway, NJ?

421 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 421 Rock Ave, Piscataway, NJ compare to other homes in Piscataway 08854?

Among the 13,708 homes in Piscataway 08854, it is worth more than 35% of them ($529,999 against a typical $584,279), its price per square foot is higher than 51% of them ($357 against a typical $356), it is bigger than 38% of them (1,485 ft² against a typical 1,626 ft²), its lot is bigger than 45% of them (0.21 ac against a typical 0.23 ac) and it is newer than 17% of them (1953 against a typical 1973). Measured against all of Middlesex County, it is worth more than 37% 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 421 Rock Ave, Piscataway, NJ?

The 2025 property tax bill for 421 Rock Ave, Piscataway, NJ was $7,962. The county assessed it at $590,700.

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Assigned schools

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