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Single Family ResidenceResidential
$400,534$280 / 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 Aug 30, 2026
Last sold for $100,300 on Oct 19, 2020

21 THORNELL ST

BROCKTON, MA 02302
3
Beds
1.5
Baths
1,428 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.
0.72 ac
Lot SizeThe size of the land the home sits on, from county records.
1988
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$401K
$369K low$432K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$100,300 · Oct 19, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,215 (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.$100,300 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$30,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$70,300
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$434,625

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.7 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.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
CountyPLYMOUTH
Lot (acres)The size of the land the home sits on, from county records.0.72
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
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.In-Ground Pool
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(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
Gilmore Elementary SchoolD
Elementary · Grades PK–5 · 0.4 mi
M
Plouffe Middle SchoolC-
Middle · Grades 6–8 · 0.6 mi
H
Brockton High SchoolD-
High · Grades 9–12 · 1.7 mi

District: Brockton School District

Neighborhood · ZIP 02302These 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.88
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.99
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.69

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.14%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.12%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.37,248
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,183 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$83,403
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$113,429
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.48 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.52%

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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 Thornell 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 91% of homes in Plymouth County
  • Costs less per square foot than 90% of homes in Plymouth County
  • Smaller than 66% of homes in Plymouth County
  • Has a bigger lot than 97% of homes in Brockton 02302
  • Newer than 89% of homes in Brockton 02302

What homes are worth in Brockton 02302

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

This home
$237K$676K

This home is worth more than 14% of homes in Brockton 02302.

How it measures up in Brockton 02302

The dot is this home. The mark in the middle is the typical home in Brockton 02302.

Estimated value$400,534
CheaperTypical $470,978Pricier

Pricier than 14% of homes nearby

Price per ft²$280
CheaperTypical $347Pricier

Pricier than 16% of homes nearby

Living area1,428 ft²
SmallerTypical 1,384 ft²Bigger

Bigger than 56% of homes nearby

Lot size0.72 ac
SmallerTypical 0.23 acBigger

Bigger than 97% of homes nearby

Year built1988
OlderTypical 1960Newer

Newer than 89% of homes nearby

How 21 Thornell St ranks against every home in each area.
MeasureThis homeBrockton 02302Plymouth County
Estimated valuepricier than$400,53414% of homes9% of homes
Price per ft²pricier than$28016% of homes10% of homes
Living areabigger than1,428 ft²56% of homes34% of homes
Lot sizebigger than0.72 ac97% of homes65% of homes
Year builtnewer than198889% of homes73% of homes

About 21 Thornell St

How much is 21 Thornell St, Brockton, MA worth?

The TopHap Estimate for 21 Thornell St, Brockton, MA is $400,534 as of Aug 30, 2026. The likely range is $368,937 to $432,131. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Thornell St, Brockton, MA last sell?

21 Thornell St, Brockton, MA last sold on Oct 19, 2020 for $100,300, according to the county's recorded deed.

How big is 21 Thornell St, Brockton, MA?

21 Thornell St, Brockton, MA has 3 bedrooms, 1.5 bathrooms, 1,428 square feet of living space and a 0.72-acre lot.

When was 21 Thornell St, Brockton, MA built?

21 Thornell St, Brockton, MA was built in 1988, making it 38 years old. It is a cape cod home. The building has 2 stories.

What schools serve 21 Thornell St, Brockton, MA?

21 Thornell St, Brockton, MA is assigned to Gilmore Elementary School (elementary), rated D; Plouffe Middle School (middle), rated C-; Brockton High School (high), rated D-. All sit in Brockton School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Thornell St, Brockton, MA compare to other homes in Brockton 02302?

Among the 9,519 homes in Brockton 02302, it is worth more than 14% of them ($400,534 against a typical $470,978), its price per square foot is higher than 16% of them ($280 against a typical $347), it is bigger than 56% of them (1,428 ft² against a typical 1,384 ft²), its lot is bigger than 97% of them (0.72 ac against a typical 0.23 ac) and it is newer than 89% of them (1988 against a typical 1960). Measured against all of Plymouth County, it is worth more than 9% 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 Thornell St, Brockton, MA?

The 2025 property tax bill for 21 Thornell St, Brockton, MA was $1,215. The county assessed it at $100,300.

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