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Single Family ResidenceResidential
$744,312$456 / 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 Sep 24, 2026

18 COWPERTHWAITE SQ

WESTFIELD, NJ 07090
0
Baths
1,632 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.
4.03 ac
Lot SizeThe size of the land the home sits on, from county records.
1981
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$744K
$698K low$791K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$11,659 (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.$508,700 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$250,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$258,700
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$508,700
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$508,700

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyUNION
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(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.

M
Roosevelt Intermediate SchoolB
Middle · Grades 6–8 · 0.1 mi
E
Franklin Elementary SchoolA
Elementary · Grades 1–5 · 0.4 mi
H
Westfield High SchoolA-
High · Grades 9–12 · 0.7 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%

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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

18 Cowperthwaite Sq 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 94% of homes in Westfield 07090
  • Costs less per square foot than 78% of homes in Westfield 07090
  • Smaller than 84% of homes in Westfield 07090
  • Among the largest lots in Westfield 07090
  • Newer than 86% 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
$633K$2.7M

This home is worth more than 6% 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$744,312
CheaperTypical $1,219,564Pricier

Pricier than 6% of homes nearby

Price per ft²$456
CheaperTypical $521Pricier

Pricier than 22% of homes nearby

Living area1,632 ft²
SmallerTypical 2,402 ft²Bigger

Bigger than 16% of homes nearby

Lot size4.03 ac
SmallerTypical 0.23 acBigger

Bigger than almost all homes nearby

Year built1981
OlderTypical 1951Newer

Newer than 81% of homes nearby

How 18 Cowperthwaite Sq ranks against every home in each area.
MeasureThis homeWestfield 07090Union County
Estimated valuepricier than$744,3126% of homes63% of homes
Price per ft²pricier than$45622% of homes67% of homes
Living areabigger than1,632 ft²16% of homes43% of homes
Lot sizebigger than4.03 acalmost all homesalmost all homes
Year builtnewer than198181% of homes86% of homes

About 18 Cowperthwaite Sq

How much is 18 Cowperthwaite Sq, Westfield, NJ worth?

The TopHap Estimate for 18 Cowperthwaite Sq, Westfield, NJ is $744,312 as of Sep 24, 2026. The likely range is $697,836 to $790,787. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18 Cowperthwaite Sq, Westfield, NJ last sell?

18 Cowperthwaite Sq, Westfield, NJ last sold on Dec 7, 2006, according to the county's recorded deed. TopHap holds 5 recorded sales for this parcel.

When was 18 Cowperthwaite Sq, Westfield, NJ built?

18 Cowperthwaite Sq, Westfield, NJ was built in 1981, making it 45 years old. The building has 2 stories.

What schools serve 18 Cowperthwaite Sq, Westfield, NJ?

18 Cowperthwaite Sq, Westfield, NJ is assigned to Roosevelt Intermediate School (middle), rated B; Franklin Elementary School (elementary), rated A; 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 18 Cowperthwaite Sq, Westfield, NJ compare to other homes in Westfield 07090?

Among the 9,479 homes in Westfield 07090, it is worth more than 6% of them ($744,312 against a typical $1,219,564), its price per square foot is higher than 22% of them ($456 against a typical $521), it is bigger than 16% of them (1,632 ft² against a typical 2,402 ft²), its lot is bigger than almost all of them (4.03 ac against a typical 0.23 ac) and it is newer than 81% of them (1981 against a typical 1951). Measured against all of Union County, it is worth more than 63% 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 18 Cowperthwaite Sq, Westfield, NJ?

The 2025 property tax bill for 18 Cowperthwaite Sq, Westfield, NJ was $11,659. The county assessed it at $508,700.

More homes on Cowperthwaite Sq

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