Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$425,304$326 / 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 98How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $108,208 on Apr 10, 2018

21 HARPER ST

PISCATAWAY, NJ 08854
0
Baths
1,305 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.
1950
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$425K
$415K low$435K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$108,208 · Apr 10, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,644 (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.$422,100 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$274,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$147,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$373,700
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$422,100

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.131 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
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
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.21
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(5)

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.

E
Grandview Elementary SchoolC
Elementary · Grades KG–3 · 0.8 mi
M
T. Schor Middle SchoolB-
Middle · Grades 6–8 · 0.9 mi
H
Piscataway High SchoolB-
High · Grades 9–12 · 2.1 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%

Owner Tools

Do you own this home?
Claim this home

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 Harper St 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 91% of homes in Piscataway 08854
  • Costs less per square foot than 75% of homes in Piscataway 08854
  • Smaller than 72% of homes in Piscataway 08854
  • Has a bigger lot than 67% of homes in Middlesex County
  • Older than 87% 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 9% 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$425,304
CheaperTypical $584,561Pricier

Pricier than 9% of homes nearby

Price per ft²$326
CheaperTypical $356Pricier

Pricier than 25% of homes nearby

Living area1,305 ft²
SmallerTypical 1,624 ft²Bigger

Bigger than 28% of homes nearby

Lot size0.21 ac
SmallerTypical 0.23 acBigger

Bigger than 44% of homes nearby

Year built1950
OlderTypical 1972Newer

Newer than 13% of homes nearby

How 21 Harper St ranks against every home in each area.
MeasureThis homePiscataway 08854Middlesex County
Estimated valuepricier than$425,3049% of homes16% of homes
Price per ft²pricier than$32625% of homes31% of homes
Living areabigger than1,305 ft²28% of homes29% of homes
Lot sizebigger than0.21 ac44% of homes67% of homes
Year builtnewer than195013% of homes24% of homes

About 21 Harper St

How much is 21 Harper St, Piscataway, NJ worth?

The TopHap Estimate for 21 Harper St, Piscataway, NJ is $425,304 as of Aug 30, 2026. The likely range is $415,149 to $435,459. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Harper St, Piscataway, NJ last sell?

21 Harper St, Piscataway, NJ last sold on Apr 10, 2018 for $108,208, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 21 Harper St, Piscataway, NJ?

21 Harper St, Piscataway, NJ has 1,305 square feet of living space and a 0.21-acre lot.

When was 21 Harper St, Piscataway, NJ built?

21 Harper St, Piscataway, NJ was built in 1950, making it 76 years old. The building has 1 story.

What schools serve 21 Harper St, Piscataway, NJ?

21 Harper St, Piscataway, NJ is assigned to Grandview Elementary School (elementary), rated C; T. Schor Middle School (middle), rated B-; 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 21 Harper St, Piscataway, NJ compare to other homes in Piscataway 08854?

Among the 13,708 homes in Piscataway 08854, it is worth more than 9% of them ($425,304 against a typical $584,561), its price per square foot is higher than 25% of them ($326 against a typical $356), it is bigger than 28% of them (1,305 ft² against a typical 1,624 ft²), its lot is bigger than 44% of them (0.21 ac against a typical 0.23 ac) and it is newer than 13% of them (1950 against a typical 1972). Measured against all of Middlesex County, it is worth more than 16% 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 Harper St, Piscataway, NJ?

The 2025 property tax bill for 21 Harper St, Piscataway, NJ was $6,644. The county assessed it at $422,100.

More homes on Harper St

Closest homes

More homes in Piscataway 08854

Assigned schools

Explore the area

See this home in context

Open 21 Harper St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map