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Single Family ResidenceResidential
$2,385,225$577 / 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 Oct 21, 2026
Last sold for $255,000 on Jul 1, 1981

21 VALLEY RD

ARLINGTON, MA 02476
5
Beds
3.5
Baths
4,137 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.
2.15 ac
Lot SizeThe size of the land the home sits on, from county records.
1928
Year BuiltThe year the home was originally built, according to county records.
3
StoriesHow many floors the home has above ground.
10
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$2.4M
$2.2M low$2.5M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$255,000 · Jul 1, 1981

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$26,345 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$2,469,100 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,619,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$849,400
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$2,397,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$2,074,110

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
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.2.15
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.Tile
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, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No

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 · 0.4 mi
E
Brackett Elementary SchoolA
Elementary · Grades KG–5 · 0.5 mi
M
Ottoson Middle SchoolA+
Middle · Grades 7–8 · 0.7 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 Valley Rd 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.

  • Among the most valuable homes in Arlington 02476
  • Costs more per square foot than 73% of homes in Middlesex County
  • Bigger than 97% of homes in Arlington 02476
  • Has a bigger lot than 92% of homes in Arlington 02476
  • Older than 70% of homes in Middlesex County

What homes are worth in Arlington 02476

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

This home
$311K$2.2M

This home is worth more than almost all homes in Arlington 02476.

How it measures up in Arlington 02476

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

Estimated value$2,385,225
CheaperTypical $1,053,908Pricier

Pricier than almost all homes nearby

Price per ft²$577
CheaperTypical $599Pricier

Pricier than 40% of homes nearby

Living area4,137 ft²
SmallerTypical 1,843 ft²Bigger

Bigger than 97% of homes nearby

Lot size2.15 ac
SmallerTypical 0.15 acBigger

Bigger than 92% of homes nearby

Year built1928
OlderTypical 1932Newer

Newer than 43% of homes nearby

How 21 Valley Rd ranks against every home in each area.
MeasureThis homeArlington 02476Middlesex County
Estimated valuepricier than$2,385,225almost all homes97% of homes
Price per ft²pricier than$57740% of homes73% of homes
Living areabigger than4,137 ft²97% of homes96% of homes
Lot sizebigger than2.15 ac92% of homes88% of homes
Year builtnewer than192843% of homes30% of homes

About 21 Valley Rd

How much is 21 Valley Rd, Arlington, MA worth?

The TopHap Estimate for 21 Valley Rd, Arlington, MA is $2,385,225 as of Oct 21, 2026. The likely range is $2,244,288 to $2,526,162. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Valley Rd, Arlington, MA last sell?

21 Valley Rd, Arlington, MA last sold on Jul 1, 1981 for $255,000, according to the county's recorded deed.

How big is 21 Valley Rd, Arlington, MA?

21 Valley Rd, Arlington, MA has 5 bedrooms, 3.5 bathrooms, 4,137 square feet of living space and a 2.15-acre lot.

When was 21 Valley Rd, Arlington, MA built?

21 Valley Rd, Arlington, MA was built in 1928, making it 98 years old. The building has 3 stories.

What schools serve 21 Valley Rd, Arlington, MA?

21 Valley Rd, Arlington, MA is assigned to Arlington High School (high), rated A+; Brackett Elementary School (elementary), rated A; 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 Valley Rd, Arlington, MA compare to other homes in Arlington 02476?

Among the 5,972 homes in Arlington 02476, it is worth more than almost all of them ($2,385,225 against a typical $1,053,908), its price per square foot is higher than 40% of them ($577 against a typical $599), it is bigger than 97% of them (4,137 ft² against a typical 1,843 ft²), its lot is bigger than 92% of them (2.15 ac against a typical 0.15 ac) and it is newer than 43% of them (1928 against a typical 1932). Measured against all of Middlesex County, it is worth more than 97% 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 Valley Rd, Arlington, MA?

The 2026 property tax bill for 21 Valley Rd, Arlington, MA was $26,345. The county assessed it at $2,469,100.

More homes on Valley Rd

Closest homes

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Assigned schools

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