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Single Family ResidenceResidential
$761,009$315 / 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 Jul 14, 2026

666 ROUTE 81

KILLINGWORTH, CT 06419
3
Beds
2
Baths
2,413 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.
11.6 ac
Lot SizeThe size of the land the home sits on, from county records.
1984
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.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$761K
$697K low$825K high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$536,009
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$428,807
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.31%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$130,000
CT STATE EMP FCU · recorded Jun 19, 2004
2nd MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$95,000
CONNECTICUT STATE EMPLOYEES FCU

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,380 (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.$281,470 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$79,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$202,370
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$281,470
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$197,029

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.42
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
21
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
54
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
97
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.
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.Cape Cod
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.2001
Lot (acres)The size of the land the home sits on, from county records.11.60
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
CoolingThe type of cooling or air conditioning in the home.Yes
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, 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(3)

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
Haddam-Killingworth Middle SchoolB+
Middle · Grades 6–8 · 2.2 mi
E
Killingworth Elementary SchoolA-
Elementary · Grades PK–3 · 2.9 mi
H
Haddam-Killingworth High SchoolA+
High · Grades 9–12 · 3.5 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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.No

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

666 Route 81 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 82% of homes in Lower Connecticut River Valley County
  • Costs more per square foot than 70% of homes in Killingworth 06419
  • Bigger than 80% of homes in Lower Connecticut River Valley County
  • Has a bigger lot than 98% of homes in Lower Connecticut River Valley County
  • Newer than 66% of homes in Lower Connecticut River Valley County

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
$364K$1.3M

This home is worth more than 77% 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$761,009
CheaperTypical $618,419Pricier

Pricier than 77% of homes nearby

Price per ft²$315
CheaperTypical $283Pricier

Pricier than 70% of homes nearby

Living area2,413 ft²
SmallerTypical 2,088 ft²Bigger

Bigger than 64% of homes nearby

Lot size11.6 ac
SmallerTypical 2.7 acBigger

Bigger than 93% of homes nearby

Year built1984
OlderTypical 1985Newer

Newer than 48% of homes nearby

How 666 Route 81 ranks against every home in each area.
MeasureThis homeKillingworth 06419Lower Connecticut River Valley County
Estimated valuepricier than$761,00977% of homes82% of homes
Price per ft²pricier than$31570% of homes60% of homes
Living areabigger than2,413 ft²64% of homes80% of homes
Lot sizebigger than11.6 ac93% of homes98% of homes
Year builtnewer than198448% of homes66% of homes

About 666 Route 81

How much is 666 Route 81, Killingworth, CT worth?

The TopHap Estimate for 666 Route 81, Killingworth, CT is $761,009 as of Jul 14, 2026. The likely range is $696,778 to $825,240. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 666 Route 81, Killingworth, CT last sell?

666 Route 81, Killingworth, CT last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 666 Route 81, Killingworth, CT?

666 Route 81, Killingworth, CT has 3 bedrooms, 2 bathrooms, 2,413 square feet of living space and a 11.60-acre lot.

When was 666 Route 81, Killingworth, CT built?

666 Route 81, Killingworth, CT was built in 1984, making it 42 years old. It is a cape cod home. The building has 2 stories.

What schools serve 666 Route 81, Killingworth, CT?

666 Route 81, Killingworth, CT is assigned to Haddam-Killingworth Middle School (middle), rated B+; Killingworth Elementary School (elementary), rated A-; 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 666 Route 81, Killingworth, CT compare to other homes in Killingworth 06419?

Among the 2,550 homes in Killingworth 06419, it is worth more than 77% of them ($761,009 against a typical $618,419), its price per square foot is higher than 70% of them ($315 against a typical $283), it is bigger than 64% of them (2,413 ft² against a typical 2,088 ft²), its lot is bigger than 93% of them (11.6 ac against a typical 2.7 ac) and it is newer than 48% of them (1984 against a typical 1985). Measured against all of Lower Connecticut River Valley County, it is worth more than 82% 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 666 Route 81, Killingworth, CT?

The 2025 property tax bill for 666 Route 81, Killingworth, CT was $7,380. The county assessed it at $281,470.

Closest homes

More homes in Killingworth 06419

Assigned schools

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