Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$678,530$256 / 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 97How 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 $458,533 on Oct 23, 2007

4 UNION ST

PLAINSBORO, NJ 08536
0
Baths
2,649 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.
0.16 ac
Lot SizeThe size of the land the home sits on, from county records.
2007
Year BuiltThe year the home was originally built, according to county records.

Valuation

$679K
$658K low$699K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$458,533 · Oct 23, 2007

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$11,565 (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.$418,100 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$120,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$297,500
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$418,100
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$418,100

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Colonial
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.16
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.

E
Wicoff Elementary SchoolA
Elementary · Grades KG–3 · 0.8 mi
M
Community Middle SchoolA
Middle · Grades 6–8 · 1.1 mi
H
West Windsor-Plainsboro High School NorthA
High · Grades 9–12 · 1.2 mi

District: West Windsor-Plainsboro Regional School District

Neighborhood · ZIP 08536These 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.93
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.96
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.93

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.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.8%
PopulationHow many people live in this area.19,591
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,507 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$127,368
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$156,070
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%

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

4 Union 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 more than 69% of homes in Middlesex County
  • Costs less per square foot than 98% of homes in Plainsboro 08536
  • Bigger than 88% of homes in Middlesex County
  • Newer than 98% of homes in Plainsboro 08536

What homes are worth in Plainsboro 08536

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

This home
$241K$1.8M

This home is worth more than 46% of homes in Plainsboro 08536.

How it measures up in Plainsboro 08536

The dot is this home. The mark in the middle is the typical home in Plainsboro 08536.

Estimated value$678,530
CheaperTypical $713,910Pricier

Pricier than 46% of homes nearby

Price per ft²$256
CheaperTypical $392Pricier

Pricier than 2% of homes nearby

Living area2,649 ft²
SmallerTypical 1,844 ft²Bigger

Bigger than 84% of homes nearby

Lot size0.16 ac
SmallerTypical 1,525 ft²Bigger

Bigger than 60% of homes nearby

Year built2007
OlderTypical 1986Newer

Newer than 98% of homes nearby

How 4 Union St ranks against every home in each area.
MeasureThis homePlainsboro 08536Middlesex County
Estimated valuepricier than$678,53046% of homes69% of homes
Price per ft²pricier than$2562% of homes6% of homes
Living areabigger than2,649 ft²84% of homes88% of homes
Lot sizebigger than0.16 ac60% of homes53% of homes
Year builtnewer than200798% of homes94% of homes

About 4 Union St

How much is 4 Union St, Plainsboro, NJ worth?

The TopHap Estimate for 4 Union St, Plainsboro, NJ is $678,530 as of Aug 30, 2026. The likely range is $658,288 to $698,772. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4 Union St, Plainsboro, NJ last sell?

4 Union St, Plainsboro, NJ last sold on Oct 23, 2007 for $458,533, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 4 Union St, Plainsboro, NJ?

4 Union St, Plainsboro, NJ has 2,649 square feet of living space and a 0.16-acre lot.

When was 4 Union St, Plainsboro, NJ built?

4 Union St, Plainsboro, NJ was built in 2007, making it 19 years old. It is a colonial home.

What schools serve 4 Union St, Plainsboro, NJ?

4 Union St, Plainsboro, NJ is assigned to Wicoff Elementary School (elementary), rated A; Community Middle School (middle), rated A; West Windsor-Plainsboro High School North (high), rated A. All sit in West Windsor-Plainsboro Regional School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4 Union St, Plainsboro, NJ compare to other homes in Plainsboro 08536?

Among the 4,710 homes in Plainsboro 08536, it is worth more than 46% of them ($678,530 against a typical $713,910), its price per square foot is higher than 2% of them ($256 against a typical $392), it is bigger than 84% of them (2,649 ft² against a typical 1,844 ft²), its lot is bigger than 60% of them (0.16 ac against a typical 1,525 ft²) and it is newer than 98% of them (2007 against a typical 1986). Measured against all of Middlesex County, it is worth more than 69% 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 4 Union St, Plainsboro, NJ?

The 2025 property tax bill for 4 Union St, Plainsboro, NJ was $11,565. The county assessed it at $418,100.

More homes on Union St

Closest homes

More homes in Plainsboro 08536

Assigned schools

Explore the area

See this home in context

Open 4 Union 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