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Single Family ResidenceResidential
$495,617$222 / 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 94How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $340,000 on Dec 27, 2021

21 DIAMOND AVE

PLAINVILLE, CT 06062
3
Beds
2.5
Baths
2,235 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.
0.22 ac
Lot SizeThe size of the land the home sits on, from county records.
1965
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$496K
$466K low$526K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$340,000 · Dec 27, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,069 (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.$205,730 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$54,320
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$151,410
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$205,730
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$144,011

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
CountyCAPITOL
Lot (acres)The size of the land the home sits on, from county records.0.22
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
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(7)

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
Plainville High SchoolB-
High · Grades 9–12 · 0.2 mi
E
Linden Street SchoolC+
Elementary · Grades PK–5 · 0.4 mi
M
Middle School of PlainvilleB
Middle · Grades 6–8 · 1.8 mi

District: Plainville School District

Neighborhood · ZIP 06062These 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.93
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.106
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.70

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.19%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.1%
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.17,194
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,873 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$86,451
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$100,792
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

21 Diamond Ave 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 91% of homes in Plainville 06062
  • Costs less per square foot than 78% of homes in Plainville 06062
  • Bigger than 91% of homes in Plainville 06062
  • Has a smaller lot than 76% of homes in Capitol County

What homes are worth in Plainville 06062

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

This home
$145K$609K

This home is worth more than 91% of homes in Plainville 06062.

How it measures up in Plainville 06062

The dot is this home. The mark in the middle is the typical home in Plainville 06062.

Estimated value$495,617
CheaperTypical $339,828Pricier

Pricier than 91% of homes nearby

Price per ft²$222
CheaperTypical $260Pricier

Pricier than 22% of homes nearby

Living area2,235 ft²
SmallerTypical 1,272 ft²Bigger

Bigger than 91% of homes nearby

Lot size0.22 ac
SmallerTypical 0.25 acBigger

Bigger than 43% of homes nearby

Year built1965
OlderTypical 1964Newer

Newer than 54% of homes nearby

How 21 Diamond Ave ranks against every home in each area.
MeasureThis homePlainville 06062Capitol County
Estimated valuepricier than$495,61791% of homes72% of homes
Price per ft²pricier than$22222% of homes25% of homes
Living areabigger than2,235 ft²91% of homes76% of homes
Lot sizebigger than0.22 ac43% of homes24% of homes
Year builtnewer than196554% of homes52% of homes

About 21 Diamond Ave

How much is 21 Diamond Ave, Plainville, CT worth?

The TopHap Estimate for 21 Diamond Ave, Plainville, CT is $495,617 as of Aug 30, 2026. The likely range is $465,530 to $525,704. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Diamond Ave, Plainville, CT last sell?

21 Diamond Ave, Plainville, CT last sold on Dec 27, 2021 for $340,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 21 Diamond Ave, Plainville, CT?

21 Diamond Ave, Plainville, CT has 3 bedrooms, 2.5 bathrooms, 2,235 square feet of living space and a 0.22-acre lot.

When was 21 Diamond Ave, Plainville, CT built?

21 Diamond Ave, Plainville, CT was built in 1965, making it 61 years old. It is a colonial home. The building has 2 stories.

What schools serve 21 Diamond Ave, Plainville, CT?

21 Diamond Ave, Plainville, CT is assigned to Plainville High School (high), rated B-; Linden Street School (elementary), rated C+; Middle School of Plainville (middle), rated B. All sit in Plainville School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Diamond Ave, Plainville, CT compare to other homes in Plainville 06062?

Among the 6,376 homes in Plainville 06062, it is worth more than 91% of them ($495,617 against a typical $339,828), its price per square foot is higher than 22% of them ($222 against a typical $260), it is bigger than 91% of them (2,235 ft² against a typical 1,272 ft²), its lot is bigger than 43% of them (0.22 ac against a typical 0.25 ac) and it is newer than 54% of them (1965 against a typical 1964). Measured against all of Capitol County, it is worth more than 72% 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 Diamond Ave, Plainville, CT?

The 2025 property tax bill for 21 Diamond Ave, Plainville, CT was $7,069. The county assessed it at $205,730.

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