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Single Family ResidenceResidential
$572,809$370 / 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 88How 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

257 S UNION ST

GUILFORD, CT 06437
3
Beds
1
Baths
1,548 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.
0.57 ac
Lot SizeThe size of the land the home sits on, from county records.
1952
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$573K
$507K low$639K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,076 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$255,920 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$162,750
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$93,170
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$365,600

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.24 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.49%
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.Split Level
CountySOUTH CENTRAL CONNECTICUT
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1988
Lot (acres)The size of the land the home sits on, from county records.0.57
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Shingle
HeatingThe type of heating system in the home.Hot Water
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Basement
PoolWhether the property has a pool, and what kind, such as in-ground.No

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Calvin Leete Elementary SchoolA
Elementary · Grades KG–4 · 0.1 mi
M
Elisabeth C. Adams Middle SchoolA-
Middle · Grades 7–8 · 0.9 mi
H
Guilford High SchoolA
High · Grades 9–12 · 2.9 mi

District: Guilford School District

Neighborhood · ZIP 06437These 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.56
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.113
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.59

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.92%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.28%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.21,178
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.429 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$124,284
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$167,172
Average tempThe average temperature here across a full year.50°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.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

257 S 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 74% of homes in South Central Connecticut County
  • Costs more per square foot than 82% of homes in South Central Connecticut County
  • Smaller than 65% of homes in Guilford 06437
  • Has a smaller lot than 70% of homes in Guilford 06437
  • Older than 82% of homes in Guilford 06437

What homes are worth in Guilford 06437

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

This home
$232K$2M

This home is worth more than 31% of homes in Guilford 06437.

How it measures up in Guilford 06437

The dot is this home. The mark in the middle is the typical home in Guilford 06437.

Estimated value$572,809
CheaperTypical $670,851Pricier

Pricier than 31% of homes nearby

Price per ft²$370
CheaperTypical $353Pricier

Pricier than 58% of homes nearby

Living area1,548 ft²
SmallerTypical 1,936 ft²Bigger

Bigger than 35% of homes nearby

Lot size0.57 ac
SmallerTypical 0.96 acBigger

Bigger than 30% of homes nearby

Year built1952
OlderTypical 1976Newer

Newer than 18% of homes nearby

How 257 S Union St ranks against every home in each area.
MeasureThis homeGuilford 06437South Central Connecticut County
Estimated valuepricier than$572,80931% of homes74% of homes
Price per ft²pricier than$37058% of homes82% of homes
Living areabigger than1,548 ft²35% of homes52% of homes
Lot sizebigger than0.57 ac30% of homes70% of homes
Year builtnewer than195218% of homes37% of homes

About 257 S Union St

How much is 257 S Union St, Guilford, CT worth?

The TopHap Estimate for 257 S Union St, Guilford, CT is $572,809 as of Sep 24, 2026. The likely range is $506,707 to $638,911. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 257 S Union St, Guilford, CT last sell?

257 S Union St, Guilford, CT last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 257 S Union St, Guilford, CT?

257 S Union St, Guilford, CT has 3 bedrooms, 1 bathrooms, 1,548 square feet of living space and a 0.57-acre lot.

When was 257 S Union St, Guilford, CT built?

257 S Union St, Guilford, CT was built in 1952, making it 74 years old. It is a split level home. The building has 1 story.

What schools serve 257 S Union St, Guilford, CT?

257 S Union St, Guilford, CT is assigned to Calvin Leete Elementary School (elementary), rated A; Elisabeth C. Adams Middle School (middle), rated A-; Guilford High School (high), rated A. All sit in Guilford School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 257 S Union St, Guilford, CT compare to other homes in Guilford 06437?

Among the 8,820 homes in Guilford 06437, it is worth more than 31% of them ($572,809 against a typical $670,851), its price per square foot is higher than 58% of them ($370 against a typical $353), it is bigger than 35% of them (1,548 ft² against a typical 1,936 ft²), its lot is bigger than 30% of them (0.57 ac against a typical 0.96 ac) and it is newer than 18% of them (1952 against a typical 1976). Measured against all of South Central Connecticut County, it is worth more than 74% 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 257 S Union St, Guilford, CT?

The 2024 property tax bill for 257 S Union St, Guilford, CT was $7,076. The county assessed it at $255,920.

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