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Single Family ResidenceResidential
$298,135$273 / 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 92How 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

423 UNION AVE

WEST HAVEN, CT 06516
3
Beds
1
Baths
1,092 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.
0.23 ac
Lot SizeThe size of the land the home sits on, from county records.
1930
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$298K
$273K low$323K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,973 (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.$172,970 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$53,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$119,070
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$113,820
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$247,100

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.Bungalow
CountySOUTH CENTRAL CONNECTICUT
Lot (acres)The size of the land the home sits on, from county records.0.23
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Yes
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
Washington Elementary SchoolD+
Elementary · Grades KG–4 · 0.8 mi
H
West Haven High SchoolC+
High · Grades 9–12 · 1.4 mi
M
Harry M. Bailey Middle SchoolC
Middle · Grades 7–8 · 2.3 mi

District: West Haven School District

Neighborhood · ZIP 06516These 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.106
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.116
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.69

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.17%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.11%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.54,120
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,531 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$74,035
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$95,709
Average tempThe average temperature here across a full year.52°F
Annual precipHow much rain and melted snow falls here in a typical year.48 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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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

423 Union Ave 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 85% of homes in South Central Connecticut County
  • Smaller than 81% of homes in South Central Connecticut County
  • Has a bigger lot than 85% of homes in West Haven Center
  • Older than 78% of homes in South Central Connecticut County

What homes are worth in West Haven 06516

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

This home
$128K$599K

This home is worth more than 23% of homes in West Haven 06516.

How it measures up in West Haven 06516

The dot is this home. The mark in the middle is the typical home in West Haven 06516.

Estimated value$298,135
CheaperTypical $358,632Pricier

Pricier than 23% of homes nearby

Price per ft²$273
CheaperTypical $282Pricier

Pricier than 45% of homes nearby

Living area1,092 ft²
SmallerTypical 1,287 ft²Bigger

Bigger than 31% of homes nearby

Lot size0.23 ac
SmallerTypical 0.17 acBigger

Bigger than 76% of homes nearby

Year built1930
OlderTypical 1955Newer

Newer than 29% of homes nearby

How 423 Union Ave ranks against every home in each area.
MeasureThis homeWest Haven CenterWest Haven 06516South Central Connecticut County
Estimated valuepricier than$298,13533% of homes23% of homes15% of homes
Price per ft²pricier than$27364% of homes45% of homes40% of homes
Living areabigger than1,092 ft²25% of homes31% of homes19% of homes
Lot sizebigger than0.23 ac85% of homes76% of homes40% of homes
Year builtnewer than193050% of homes29% of homes22% of homes

About 423 Union Ave

How much is 423 Union Ave, West Haven, CT worth?

The TopHap Estimate for 423 Union Ave, West Haven, CT is $298,135 as of Sep 24, 2026. The likely range is $273,243 to $323,027. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 423 Union Ave, West Haven, CT last sell?

423 Union Ave, West Haven, CT last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 423 Union Ave, West Haven, CT?

423 Union Ave, West Haven, CT has 3 bedrooms, 1 bathrooms, 1,092 square feet of living space and a 0.23-acre lot.

When was 423 Union Ave, West Haven, CT built?

423 Union Ave, West Haven, CT was built in 1930, making it 96 years old. It is a bungalow home. The building has 1 story.

What schools serve 423 Union Ave, West Haven, CT?

423 Union Ave, West Haven, CT is assigned to Washington Elementary School (elementary), rated D+; West Haven High School (high), rated C+; Harry M. Bailey Middle School (middle), rated C. All sit in West Haven School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 423 Union Ave, West Haven, CT compare to other homes in West Haven 06516?

Among the 14,661 homes in West Haven 06516, it is worth more than 23% of them ($298,135 against a typical $358,632), its price per square foot is higher than 45% of them ($273 against a typical $282), it is bigger than 31% of them (1,092 ft² against a typical 1,287 ft²), its lot is bigger than 76% of them (0.23 ac against a typical 0.17 ac) and it is newer than 29% of them (1930 against a typical 1955). Measured against all of South Central Connecticut County, it is worth more than 15% 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 423 Union Ave, West Haven, CT?

The 2025 property tax bill for 423 Union Ave, West Haven, CT was $5,973. The county assessed it at $172,970.

More homes on Union Ave

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