Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$317,416$154 / 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 91How 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

309 MILL ST

SOUTHINGTON, CT 06489
5
Beds
2
Baths
2,059 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.
0.48 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.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$317K
$289K low$346K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,285 (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.$159,150 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$55,630
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$103,520
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$159,150
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$111,405

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.Conventional
CountyCAPITOL
Lot (acres)The size of the land the home sits on, from county records.0.48
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(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.

E
Kelley Elementary SchoolB+
Elementary · Grades KG–5 · 0.4 mi
H
Southington High SchoolA-
High · Grades 9–12 · 1.7 mi
M
Joseph A. DePaolo Middle SchoolA
Middle · Grades 6–8 · 1.7 mi

District: Southington School District

Neighborhood · ZIP 06489These 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.82
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.67

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.0%
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.32,160
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,119 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$118,809
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$143,230
Average tempThe average temperature here across a full year.49°F
Annual precipHow much rain and melted snow falls here in a typical year.51 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.56%

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

309 Mill 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 87% of homes in Southington 06489
  • Among the lowest price per square foot in Southington 06489
  • Bigger than 71% of homes in Capitol County
  • Older than 94% of homes in Southington 06489

What homes are worth in Southington 06489

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

This home
$203K$1M

This home is worth more than 13% of homes in Southington 06489.

How it measures up in Southington 06489

The dot is this home. The mark in the middle is the typical home in Southington 06489.

Estimated value$317,416
CheaperTypical $460,718Pricier

Pricier than 13% of homes nearby

Price per ft²$154
CheaperTypical $282Pricier

Cheaper than almost all homes nearby

Living area2,059 ft²
SmallerTypical 1,604 ft²Bigger

Bigger than 68% of homes nearby

Lot size0.48 ac
SmallerTypical 0.52 acBigger

Bigger than 46% of homes nearby

Year built1925
OlderTypical 1974Newer

Newer than 6% of homes nearby

How 309 Mill St ranks against every home in each area.
MeasureThis homeSouthington 06489Capitol County
Estimated valuepricier than$317,41613% of homes26% of homes
Price per ft²pricier than$154almost no homes3% of homes
Living areabigger than2,059 ft²68% of homes71% of homes
Lot sizebigger than0.48 ac46% of homes56% of homes
Year builtnewer than19256% of homes12% of homes

About 309 Mill St

How much is 309 Mill St, Southington, CT worth?

The TopHap Estimate for 309 Mill St, Southington, CT is $317,416 as of Sep 24, 2026. The likely range is $288,757 to $346,075. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 309 Mill St, Southington, CT last sell?

309 Mill St, Southington, CT last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 309 Mill St, Southington, CT?

309 Mill St, Southington, CT has 5 bedrooms, 2 bathrooms, 2,059 square feet of living space and a 0.48-acre lot.

When was 309 Mill St, Southington, CT built?

309 Mill St, Southington, CT was built in 1925, making it 101 years old. It is a conventional home. The building has 2 stories.

What schools serve 309 Mill St, Southington, CT?

309 Mill St, Southington, CT is assigned to Kelley Elementary School (elementary), rated B+; Southington High School (high), rated A-; Joseph A. DePaolo Middle School (middle), rated A. All sit in Southington School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 309 Mill St, Southington, CT compare to other homes in Southington 06489?

Among the 12,567 homes in Southington 06489, it is worth more than 13% of them ($317,416 against a typical $460,718), its price per square foot is higher than almost none of them ($154 against a typical $282), it is bigger than 68% of them (2,059 ft² against a typical 1,604 ft²), its lot is bigger than 46% of them (0.48 ac against a typical 0.52 ac) and it is newer than 6% of them (1925 against a typical 1974). Measured against all of Capitol County, it is worth more than 26% 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 309 Mill St, Southington, CT?

The 2025 property tax bill for 309 Mill St, Southington, CT was $5,285. The county assessed it at $159,150.

More homes on Mill St

Closest homes

More homes in Southington 06489

Assigned schools

Explore the area

See this home in context

Open 309 Mill 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