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Single Family ResidenceResidential
$526,076$275 / 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 90How 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
Last sold for $171,000 on Oct 21, 1996

11 ALLISON DR

PORTLAND, CT 06480
4
Beds
2.5
Baths
1,916 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.
0.34 ac
Lot SizeThe size of the land the home sits on, from county records.
1987
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

$526K
$474K low$578K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$171,000 · Oct 21, 1996

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,770 (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.$248,430 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$54,250
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$194,180
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$248,430
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$173,901

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.37
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
13
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
58
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
95
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
20
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.Colonial
CountyLOWER CONNECTICUT RIVER VALLEY
Lot (acres)The size of the land the home sits on, from county records.0.34
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
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
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.

H
Portland High SchoolB-
High · Grades 9–12 · 0.9 mi
M
Portland Middle SchoolB
Middle · Grades 7–8 · 0.9 mi
E
Valley View School
Elementary · Grades PK–1 · 1.1 mi

District: Portland School District

Neighborhood · ZIP 06480These 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.41
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 100.66

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.30%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.9%
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.8,848
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.361 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$123,849
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$127,966
Average tempThe average temperature here across a full year.50°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

11 Allison Dr 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 77% of homes in Portland 06480
  • Costs more per square foot than 77% of homes in Portland 06480
  • Has a smaller lot than 72% of homes in Lower Connecticut River Valley County
  • Newer than 73% of homes in Portland 06480

What homes are worth in Portland 06480

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

This home
$191K$760K

This home is worth more than 77% of homes in Portland 06480.

How it measures up in Portland 06480

The dot is this home. The mark in the middle is the typical home in Portland 06480.

Estimated value$526,076
CheaperTypical $403,836Pricier

Pricier than 77% of homes nearby

Price per ft²$275
CheaperTypical $241Pricier

Pricier than 77% of homes nearby

Living area1,916 ft²
SmallerTypical 1,817 ft²Bigger

Bigger than 55% of homes nearby

Lot size0.34 ac
SmallerTypical 0.53 acBigger

Bigger than 31% of homes nearby

Year built1987
OlderTypical 1963Newer

Newer than 73% of homes nearby

How 11 Allison Dr ranks against every home in each area.
MeasureThis homePortland 06480Lower Connecticut River Valley County
Estimated valuepricier than$526,07677% of homes56% of homes
Price per ft²pricier than$27577% of homes43% of homes
Living areabigger than1,916 ft²55% of homes63% of homes
Lot sizebigger than0.34 ac31% of homes28% of homes
Year builtnewer than198773% of homes73% of homes

About 11 Allison Dr

How much is 11 Allison Dr, Portland, CT worth?

The TopHap Estimate for 11 Allison Dr, Portland, CT is $526,076 as of Sep 24, 2026. The likely range is $474,372 to $577,780. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 11 Allison Dr, Portland, CT last sell?

11 Allison Dr, Portland, CT last sold on Oct 21, 1996 for $171,000, according to the county's recorded deed.

How big is 11 Allison Dr, Portland, CT?

11 Allison Dr, Portland, CT has 4 bedrooms, 2.5 bathrooms, 1,916 square feet of living space and a 0.34-acre lot.

When was 11 Allison Dr, Portland, CT built?

11 Allison Dr, Portland, CT was built in 1987, making it 39 years old. It is a colonial home. The building has 2 stories.

What schools serve 11 Allison Dr, Portland, CT?

11 Allison Dr, Portland, CT is assigned to Portland High School (high), rated B-; Portland Middle School (middle), rated B; Valley View School (elementary). All sit in Portland School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 11 Allison Dr, Portland, CT compare to other homes in Portland 06480?

Among the 3,489 homes in Portland 06480, it is worth more than 77% of them ($526,076 against a typical $403,836), its price per square foot is higher than 77% of them ($275 against a typical $241), it is bigger than 55% of them (1,916 ft² against a typical 1,817 ft²), its lot is bigger than 31% of them (0.34 ac against a typical 0.53 ac) and it is newer than 73% of them (1987 against a typical 1963). Measured against all of Lower Connecticut River Valley County, it is worth more than 56% 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 11 Allison Dr, Portland, CT?

The 2025 property tax bill for 11 Allison Dr, Portland, CT was $8,770. The county assessed it at $248,430.

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