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Duplex (2 Units, Any Combination)Residential
Last sold for $1,275,000 on Jan 23, 2026

21 PLYMOUTH ST

ARLINGTON, MA 02476
3
Beds
2
Baths
2,620 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.
0.15 ac
Lot SizeThe size of the land the home sits on, from county records.
1925
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,275,000 · Jan 23, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,445 (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.$1,155,500 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$673,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$481,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,155,500

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Duplex (2 Units, Any Combination)
StyleThe architectural style of the home, such as ranch or colonial.Two Family
CountyMiddlesex
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.1959
Lot (acres)The size of the land the home sits on, from county records.0.15
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.Steam
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, Basement

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
Arlington High SchoolA+
High · Grades 9–12 · 0.3 mi
E
Brackett Elementary SchoolB+
Elementary · Grades KG–5 · 0.6 mi
M
Ottoson Middle SchoolA
Middle · Grades 7–8 · 0.6 mi

District: Arlington School District

Neighborhood · ZIP 02476These 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.61
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.109
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.78

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.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.18,178
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.8,391 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$145,237
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$192,900
Average tempThe average temperature here across a full year.49°F
Annual precipHow much rain and melted snow falls here in a typical year.47 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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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 Plymouth 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.

  • Bigger than 80% of homes in Arlington 02476
  • Has a smaller lot than 76% of homes in Middlesex County
  • Older than 72% of homes in Middlesex County

How it measures up in Arlington 02476

The dot is this home. The mark in the middle is the typical home in Arlington 02476.

Living area2,620 ft²
SmallerTypical 1,845 ft²Bigger

Bigger than 80% of homes nearby

Lot size0.15 ac
SmallerTypical 0.15 acBigger

Bigger than 47% of homes nearby

Year built1925
OlderTypical 1932Newer

Newer than 34% of homes nearby

How 21 Plymouth St ranks against every home in each area.
MeasureThis homeArlington 02476Middlesex County
Living areabigger than2,620 ft²80% of homes77% of homes
Lot sizebigger than0.15 ac47% of homes24% of homes
Year builtnewer than192534% of homes28% of homes

About 21 Plymouth St

When did 21 Plymouth St, Arlington, MA last sell?

21 Plymouth St, Arlington, MA last sold on Jan 23, 2026 for $1,275,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 21 Plymouth St, Arlington, MA?

21 Plymouth St, Arlington, MA has 3 bedrooms, 2 bathrooms, 2,620 square feet of living space and a 0.15-acre lot.

When was 21 Plymouth St, Arlington, MA built?

21 Plymouth St, Arlington, MA was built in 1925, making it 101 years old. It is a two family home. The building has 2 stories.

What schools serve 21 Plymouth St, Arlington, MA?

21 Plymouth St, Arlington, MA is assigned to Arlington High School (high), rated A+; Brackett Elementary School (elementary), rated B+; Ottoson Middle School (middle), rated A. All sit in Arlington School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Plymouth St, Arlington, MA compare to other homes in Arlington 02476?

Among the 5,972 homes in Arlington 02476, it is bigger than 80% of them (2,620 ft² against a typical 1,845 ft²), its lot is bigger than 47% of them (0.15 ac against a typical 0.15 ac) and it is newer than 34% of them (1925 against a typical 1932). 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 Plymouth St, Arlington, MA?

The 2025 property tax bill for 21 Plymouth St, Arlington, MA was $12,445. The county assessed it at $1,155,500.

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