Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$408,198$408 / 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 98How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $200,000 on Aug 28, 2007

21 MASON ST

BROCKTON, MA 02302
2
Beds
1
Baths
1,000 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.
0.16 ac
Lot SizeThe size of the land the home sits on, from county records.
1954
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$408K
$398K low$418K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$200,000 · Aug 28, 2007

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,774 (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.$394,200 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$139,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$254,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$345,420

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
CountyPLYMOUTH
Lot (acres)The size of the land the home sits on, from county records.0.16
HeatingThe type of heating system in the home.Hot Water
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

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.

M
East Middle SchoolF
Middle · Grades 6–8 · 0.3 mi
E
DowneyD-
Elementary · Grades PK–5 · 0.8 mi
H
Brockton High SchoolD-
High · Grades 9–12 · 2.3 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%

Owner Tools

Do you own this home?
Claim this home

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 Mason 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 more per square foot than 78% of homes in Brockton 02302
  • Smaller than 88% of homes in Brockton 02302
  • Has a smaller lot than 87% of homes in Brockton 02302
  • Older than 69% 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
$244K$692K

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$408,198
CheaperTypical $483,975Pricier

Pricier than 14% of homes nearby

Price per ft²$408
CheaperTypical $351Pricier

Pricier than 78% of homes nearby

Living area1,000 ft²
SmallerTypical 1,384 ft²Bigger

Bigger than 12% of homes nearby

Lot size0.16 ac
SmallerTypical 0.23 acBigger

Bigger than 13% of homes nearby

Year built1954
OlderTypical 1960Newer

Newer than 31% of homes nearby

How 21 Mason St ranks against every home in each area.
MeasureThis homeBrockton 02302Plymouth County
Estimated valuepricier than$408,19814% of homes9% of homes
Price per ft²pricier than$40878% of homes57% of homes
Living areabigger than1,000 ft²12% of homes12% of homes
Lot sizebigger than0.16 ac13% of homes13% of homes
Year builtnewer than195431% of homes32% of homes

About 21 Mason St

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

The TopHap Estimate for 21 Mason St, Brockton, MA is $408,198 as of Oct 21, 2026. The likely range is $398,115 to $418,281. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

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

21 Mason St, Brockton, MA last sold on Aug 28, 2007 for $200,000, according to the county's recorded deed.

How big is 21 Mason St, Brockton, MA?

21 Mason St, Brockton, MA has 2 bedrooms, 1 bathrooms, 1,000 square feet of living space and a 0.16-acre lot.

When was 21 Mason St, Brockton, MA built?

21 Mason St, Brockton, MA was built in 1954, making it 72 years old. It is a ranch home. The building has 1 story.

What schools serve 21 Mason St, Brockton, MA?

21 Mason St, Brockton, MA is assigned to East Middle School (middle), rated F; Downey (elementary), rated D-; 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 Mason 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 ($408,198 against a typical $483,975), its price per square foot is higher than 78% of them ($408 against a typical $351), it is bigger than 12% of them (1,000 ft² against a typical 1,384 ft²), its lot is bigger than 13% of them (0.16 ac against a typical 0.23 ac) and it is newer than 31% of them (1954 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 Mason St, Brockton, MA?

The 2025 property tax bill for 21 Mason St, Brockton, MA was $4,774. The county assessed it at $394,200.

More homes on Mason St

Closest homes

More homes in Brockton 02302

Assigned schools

Explore the area

See this home in context

Open 21 Mason St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map