Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$1,904,545$501 / 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 Jul 14, 2026
Last sold for $1,400,000 on Jun 11, 2018

640 PROSPECT ST

WESTFIELD, NJ 07090
0
Baths
3,801 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.
0.32 ac
Lot SizeThe size of the land the home sits on, from county records.
1908
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.9M
$1.8M low$2M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,400,000 · Jun 11, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$29,984 (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.$1,308,200 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$728,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$580,200
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,308,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,308,200

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.11 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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
StyleThe architectural style of the home, such as ranch or colonial.Colonial
CountyUNION
Lot (acres)The size of the land the home sits on, from county records.0.32
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
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.

E
Franklin Elementary SchoolA
Elementary · Grades 1–5 · 0.1 mi
M
Roosevelt Intermediate SchoolB
Middle · Grades 6–8 · 0.4 mi
H
Westfield High SchoolA-
High · Grades 9–12 · 1.0 mi

District: Westfield Town School District

Neighborhood · ZIP 07090These 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.52
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 100.112

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.40%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.7%
PopulationHow many people live in this area.31,941
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,742 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$183,919
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$244,350
Average tempThe average temperature here across a full year.53°F
Annual precipHow much rain and melted snow falls here in a typical year.50 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.56%

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

640 Prospect 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 97% of homes in Union County
  • Costs more per square foot than 77% of homes in Union County
  • Bigger than 96% of homes in Union County
  • Has a bigger lot than 84% of homes in Union County
  • Older than 94% of homes in Union County

What homes are worth in Westfield 07090

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

This home
$596K$2.6M

This home is worth more than 89% of homes in Westfield 07090.

How it measures up in Westfield 07090

The dot is this home. The mark in the middle is the typical home in Westfield 07090.

Estimated value$1,904,545
CheaperTypical $1,191,741Pricier

Pricier than 89% of homes nearby

Price per ft²$501
CheaperTypical $508Pricier

Pricier than 47% of homes nearby

Living area3,801 ft²
SmallerTypical 2,406 ft²Bigger

Bigger than 88% of homes nearby

Lot size0.32 ac
SmallerTypical 0.23 acBigger

Bigger than 76% of homes nearby

Year built1908
OlderTypical 1951Newer

Newer than 8% of homes nearby

How 640 Prospect St ranks against every home in each area.
MeasureThis homeWestfield 07090Union County
Estimated valuepricier than$1,904,54589% of homes97% of homes
Price per ft²pricier than$50147% of homes77% of homes
Living areabigger than3,801 ft²88% of homes96% of homes
Lot sizebigger than0.32 ac76% of homes84% of homes
Year builtnewer than19088% of homes6% of homes

About 640 Prospect St

How much is 640 Prospect St, Westfield, NJ worth?

The TopHap Estimate for 640 Prospect St, Westfield, NJ is $1,904,545 as of Jul 14, 2026. The likely range is $1,838,524 to $1,970,566. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 640 Prospect St, Westfield, NJ last sell?

640 Prospect St, Westfield, NJ last sold on Jun 11, 2018 for $1,400,000, according to the county's recorded deed.

How big is 640 Prospect St, Westfield, NJ?

640 Prospect St, Westfield, NJ has 3,801 square feet of living space and a 0.32-acre lot.

When was 640 Prospect St, Westfield, NJ built?

640 Prospect St, Westfield, NJ was built in 1908, making it 118 years old. It is a colonial home. The building has 2 stories.

What schools serve 640 Prospect St, Westfield, NJ?

640 Prospect St, Westfield, NJ is assigned to Franklin Elementary School (elementary), rated A; Roosevelt Intermediate School (middle), rated B; Westfield High School (high), rated A-. All sit in Westfield Town School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 640 Prospect St, Westfield, NJ compare to other homes in Westfield 07090?

Among the 9,479 homes in Westfield 07090, it is worth more than 89% of them ($1,904,545 against a typical $1,191,741), its price per square foot is higher than 47% of them ($501 against a typical $508), it is bigger than 88% of them (3,801 ft² against a typical 2,406 ft²), its lot is bigger than 76% of them (0.32 ac against a typical 0.23 ac) and it is newer than 8% of them (1908 against a typical 1951). Measured against all of Union County, it is worth more than 97% 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 640 Prospect St, Westfield, NJ?

The 2025 property tax bill for 640 Prospect St, Westfield, NJ was $29,984. The county assessed it at $1,308,200.

More homes on Prospect St

Closest homes

More homes in Westfield 07090

Assigned schools

Explore the area

See this home in context

Open 640 Prospect 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