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Single Family ResidenceResidential
$369,417$480 / 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 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $335,000 on May 9, 2024

309 OLD DEEP RIVER TPKE

KILLINGWORTH, CT 06419
1
Beds
1
Baths
770 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.
1.4 ac
Lot SizeThe size of the land the home sits on, from county records.
1950
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
4
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$369K
$355K low$384K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$335,000 · May 9, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,322 (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.$126,700 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$63,840
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$62,860
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$118,860
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$88,690

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.47
35
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
16
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
53
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
96
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
39
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.35 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
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.1 percent flood zone

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.Ranch
CountyLOWER CONNECTICUT RIVER VALLEY
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.1985
Lot (acres)The size of the land the home sits on, from county records.1.40
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.Asphalt
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
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
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck

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.

E
Killingworth Elementary SchoolA-
Elementary · Grades PK–3 · 1.5 mi
M
Haddam-Killingworth Middle SchoolB+
Middle · Grades 6–8 · 2.0 mi
H
Haddam-Killingworth High SchoolA+
High · Grades 9–12 · 7.3 mi

District: Regional School District 17

Neighborhood · ZIP 06419These 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.78
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.120
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.61

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.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.8%
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.5,642
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.159 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$125,563
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$180,498
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%

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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

309 Old Deep River Tpke 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 98% of homes in Killingworth 06419
  • Among the highest price per square foot in Killingworth 06419
  • Smaller than 98% of homes in Killingworth 06419
  • Has a smaller lot than 94% of homes in Killingworth 06419
  • Older than 93% of homes in Killingworth 06419

What homes are worth in Killingworth 06419

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

This home
$368K$1.2M

This home is worth more than 2% of homes in Killingworth 06419.

How it measures up in Killingworth 06419

The dot is this home. The mark in the middle is the typical home in Killingworth 06419.

Estimated value$369,417
CheaperTypical $618,419Pricier

Pricier than 2% of homes nearby

Price per ft²$480
CheaperTypical $283Pricier

Pricier than almost all homes nearby

Living area770 ft²
SmallerTypical 2,085 ft²Bigger

Bigger than 2% of homes nearby

Lot size1.4 ac
SmallerTypical 2.7 acBigger

Bigger than 6% of homes nearby

Year built1950
OlderTypical 1985Newer

Newer than 7% of homes nearby

How 309 Old Deep River Tpke ranks against every home in each area.
MeasureThis homeKillingworth 06419Lower Connecticut River Valley County
Estimated valuepricier than$369,4172% of homes23% of homes
Price per ft²pricier than$480almost all homes88% of homes
Living areabigger than770 ft²2% of homes5% of homes
Lot sizebigger than1.4 ac6% of homes71% of homes
Year builtnewer than19507% of homes24% of homes

About 309 Old Deep River Tpke

How much is 309 Old Deep River Tpke, Killingworth, CT worth?

The TopHap Estimate for 309 Old Deep River Tpke, Killingworth, CT is $369,417 as of Jul 14, 2026. The likely range is $354,904 to $383,930. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 309 Old Deep River Tpke, Killingworth, CT last sell?

309 Old Deep River Tpke, Killingworth, CT last sold on May 9, 2024 for $335,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 309 Old Deep River Tpke, Killingworth, CT?

309 Old Deep River Tpke, Killingworth, CT has 1 bedrooms, 1 bathrooms, 770 square feet of living space and a 1.40-acre lot.

When was 309 Old Deep River Tpke, Killingworth, CT built?

309 Old Deep River Tpke, Killingworth, CT was built in 1950, making it 76 years old. It is a ranch home. The building has 1 story.

What schools serve 309 Old Deep River Tpke, Killingworth, CT?

309 Old Deep River Tpke, Killingworth, CT is assigned to Killingworth Elementary School (elementary), rated A-; Haddam-Killingworth Middle School (middle), rated B+; Haddam-Killingworth High School (high), rated A+. All sit in Regional School District 17. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 309 Old Deep River Tpke, Killingworth, CT compare to other homes in Killingworth 06419?

Among the 2,550 homes in Killingworth 06419, it is worth more than 2% of them ($369,417 against a typical $618,419), its price per square foot is higher than almost all of them ($480 against a typical $283), it is bigger than 2% of them (770 ft² against a typical 2,085 ft²), its lot is bigger than 6% of them (1.4 ac against a typical 2.7 ac) and it is newer than 7% of them (1950 against a typical 1985). Measured against all of Lower Connecticut River Valley County, it is worth more than 23% 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 Old Deep River Tpke, Killingworth, CT?

The 2025 property tax bill for 309 Old Deep River Tpke, Killingworth, CT was $3,322. The county assessed it at $126,700.

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