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Single Family ResidenceResidential
$777,380$477 / 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 95How 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 $415,000 on Mar 25, 2014

21 LIBRARY PL

EDISON, NJ 08820
0
Baths
1,630 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.
0.39 ac
Lot SizeThe size of the land the home sits on, from county records.
1971
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$777K
$742K low$813K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$415,000 · Mar 25, 2014

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$11,759 (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.$197,600 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$116,800
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$80,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$197,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$197,600

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.42
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
14
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
69
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
84
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
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.39
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.

H
John P. Stevens High SchoolA
High · Grades 9–12 · 0.5 mi
M
John Adams Middle SchoolA
Middle · Grades 6–8 · 0.6 mi
E
James Madison Primary School
Elementary · Grades KG–2 · 0.9 mi

District: Edison Township School District

Neighborhood · ZIP 08820These 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.47
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.101
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.108

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.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.1%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.43,277
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,188 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$144,715
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$170,257
Average tempThe average temperature here across a full year.53°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

21 Library Pl 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 more than 80% of homes in Middlesex County
  • Costs more per square foot than 91% of homes in Middlesex County
  • Smaller than 66% of homes in North / Potters / New Dover
  • Has a bigger lot than 89% of homes in Middlesex County
  • Older than 75% of homes in North / Potters / New Dover

What homes are worth in Edison 08820

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

This home
$453K$1.7M

This home is worth more than 37% of homes in Edison 08820.

How it measures up in Edison 08820

The dot is this home. The mark in the middle is the typical home in Edison 08820.

Estimated value$777,380
CheaperTypical $845,365Pricier

Pricier than 37% of homes nearby

Price per ft²$477
CheaperTypical $411Pricier

Pricier than 83% of homes nearby

Living area1,630 ft²
SmallerTypical 1,968 ft²Bigger

Bigger than 36% of homes nearby

Lot size0.39 ac
SmallerTypical 0.23 acBigger

Bigger than 78% of homes nearby

Year built1971
OlderTypical 1982Newer

Newer than 34% of homes nearby

How 21 Library Pl ranks against every home in each area.
MeasureThis homeNorth / Potters / New DoverEdison 08820Middlesex County
Estimated valuepricier than$777,38035% of homes37% of homes80% of homes
Price per ft²pricier than$47783% of homes83% of homes91% of homes
Living areabigger than1,630 ft²34% of homes36% of homes51% of homes
Lot sizebigger than0.39 ac82% of homes78% of homes89% of homes
Year builtnewer than197125% of homes34% of homes54% of homes

About 21 Library Pl

How much is 21 Library Pl, Edison, NJ worth?

The TopHap Estimate for 21 Library Pl, Edison, NJ is $777,380 as of Aug 30, 2026. The likely range is $742,235 to $812,525. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Library Pl, Edison, NJ last sell?

21 Library Pl, Edison, NJ last sold on Mar 25, 2014 for $415,000, according to the county's recorded deed.

How big is 21 Library Pl, Edison, NJ?

21 Library Pl, Edison, NJ has 1,630 square feet of living space and a 0.39-acre lot.

When was 21 Library Pl, Edison, NJ built?

21 Library Pl, Edison, NJ was built in 1971, making it 55 years old. The building has 2 stories.

What schools serve 21 Library Pl, Edison, NJ?

21 Library Pl, Edison, NJ is assigned to John P. Stevens High School (high), rated A; John Adams Middle School (middle), rated A; James Madison Primary School (elementary). All sit in Edison Township School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Library Pl, Edison, NJ compare to other homes in Edison 08820?

Among the 11,333 homes in Edison 08820, it is worth more than 37% of them ($777,380 against a typical $845,365), its price per square foot is higher than 83% of them ($477 against a typical $411), it is bigger than 36% of them (1,630 ft² against a typical 1,968 ft²), its lot is bigger than 78% of them (0.39 ac against a typical 0.23 ac) and it is newer than 34% of them (1971 against a typical 1982). Measured against all of Middlesex County, it is worth more than 80% 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 Library Pl, Edison, NJ?

The 2025 property tax bill for 21 Library Pl, Edison, NJ was $11,759. The county assessed it at $197,600.

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