Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$365,896$211 / 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 93How 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

21 THOMPSON ST

HAMDEN, CT 06518
4
Beds
2
Baths
1,735 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.
0.21 ac
Lot SizeThe size of the land the home sits on, from county records.
1925
Year BuiltThe year the home was originally built, according to county records.
2
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

$366K
$341K low$391K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,649 (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.$243,810 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$61,110
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$182,700
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$158,760
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$348,300

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.3 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
CountySOUTH CENTRAL CONNECTICUT
Lot (acres)The size of the land the home sits on, from county records.0.21
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(2)

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
Hamden Middle SchoolC
Middle · Grades 7–8 · 0.3 mi
E
Bear Path SchoolC+
Elementary · Grades KG–6 · 1.0 mi
H
Hamden High SchoolD+
High · Grades 9–12 · 1.2 mi

District: Hamden School District

Neighborhood · ZIP 06518These 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.85
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.90%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.25%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.18,627
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,131 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$101,859
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$121,919
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.52 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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

21 Thompson 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 less than 68% of homes in South Central Connecticut County
  • Costs less per square foot than 88% of homes in South Central Connecticut County
  • Has a smaller lot than 90% of homes in Hamden 06518
  • Older than 94% of homes in Hamden 06518

What homes are worth in Hamden 06518

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

This home
$188K$689K

This home is worth more than 42% of homes in Hamden 06518.

How it measures up in Hamden 06518

The dot is this home. The mark in the middle is the typical home in Hamden 06518.

Estimated value$365,896
CheaperTypical $381,590Pricier

Pricier than 42% of homes nearby

Price per ft²$211
CheaperTypical $234Pricier

Pricier than 24% of homes nearby

Living area1,735 ft²
SmallerTypical 1,598 ft²Bigger

Bigger than 58% of homes nearby

Lot size0.21 ac
SmallerTypical 0.47 acBigger

Bigger than 10% of homes nearby

Year built1925
OlderTypical 1969Newer

Newer than 6% of homes nearby

How 21 Thompson St ranks against every home in each area.
MeasureThis homeHamden 06518South Central Connecticut County
Estimated valuepricier than$365,89642% of homes32% of homes
Price per ft²pricier than$21124% of homes12% of homes
Living areabigger than1,735 ft²58% of homes60% of homes
Lot sizebigger than0.21 ac10% of homes36% of homes
Year builtnewer than19256% of homes18% of homes

About 21 Thompson St

How much is 21 Thompson St, Hamden, CT worth?

The TopHap Estimate for 21 Thompson St, Hamden, CT is $365,896 as of Sep 24, 2026. The likely range is $341,140 to $390,652. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Thompson St, Hamden, CT last sell?

21 Thompson St, Hamden, CT last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 21 Thompson St, Hamden, CT?

21 Thompson St, Hamden, CT has 4 bedrooms, 2 bathrooms, 1,735 square feet of living space and a 0.21-acre lot.

When was 21 Thompson St, Hamden, CT built?

21 Thompson St, Hamden, CT was built in 1925, making it 101 years old. It is a colonial home. The building has 2 stories.

What schools serve 21 Thompson St, Hamden, CT?

21 Thompson St, Hamden, CT is assigned to Hamden Middle School (middle), rated C; Bear Path School (elementary), rated C+; Hamden High School (high), rated D+. All sit in Hamden School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Thompson St, Hamden, CT compare to other homes in Hamden 06518?

Among the 4,901 homes in Hamden 06518, it is worth more than 42% of them ($365,896 against a typical $381,590), its price per square foot is higher than 24% of them ($211 against a typical $234), it is bigger than 58% of them (1,735 ft² against a typical 1,598 ft²), its lot is bigger than 10% of them (0.21 ac against a typical 0.47 ac) and it is newer than 6% of them (1925 against a typical 1969). Measured against all of South Central Connecticut County, it is worth more than 32% 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 21 Thompson St, Hamden, CT?

The 2024 property tax bill for 21 Thompson St, Hamden, CT was $12,649. The county assessed it at $243,810.

More homes on Thompson St

Closest homes

More homes in Hamden 06518

Assigned schools

Explore the area

See this home in context

Open 21 Thompson 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