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CondominiumResidential
$805,603$638 / 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 Sep 24, 2026

9 BELKNAP ST

ARLINGTON, MA 02474
3
Beds
1.5
Baths
1,262 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.
0.21 ac
Lot SizeThe size of the land the home sits on, from county records.
1900
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

$806K
$740K low$871K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,307 (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.$771,300 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$771,300
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$715,350

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
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.2014
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.Hot Water
CoolingThe type of cooling or air conditioning in the home.Yes
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.

E
R.J. Hardy Elementary SchoolB
Elementary · Grades KG–5 · 0.3 mi
H
Arlington High SchoolA+
High · Grades 9–12 · 1.0 mi
M
Ottoson Middle SchoolA
Middle · Grades 7–8 · 1.7 mi

District: Arlington School District

Neighborhood · ZIP 02474These 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 100.79

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.33%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.0%
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.28,960
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.8,757 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$135,066
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$157,393
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

9 Belknap 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 76% of homes in Arlington 02474
  • Costs more per square foot than 80% of homes in Middlesex County
  • Smaller than 80% of homes in Arlington 02474
  • Has a bigger lot than 78% of homes in Arlington 02474
  • Older than 94% of homes in Arlington 02474

What homes are worth in Arlington 02474

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

This home
$332K$2.1M

This home is worth more than 24% of homes in Arlington 02474.

How it measures up in Arlington 02474

The dot is this home. The mark in the middle is the typical home in Arlington 02474.

Estimated value$805,603
CheaperTypical $1,027,626Pricier

Pricier than 24% of homes nearby

Price per ft²$638
CheaperTypical $590Pricier

Pricier than 67% of homes nearby

Living area1,262 ft²
SmallerTypical 1,973 ft²Bigger

Bigger than 20% of homes nearby

Lot size0.21 ac
SmallerTypical 0.14 acBigger

Bigger than 78% of homes nearby

Year built1900
OlderTypical 1933Newer

Newer than 6% of homes nearby

How 9 Belknap St ranks against every home in each area.
MeasureThis homeArlington 02474Middlesex County
Estimated valuepricier than$805,60324% of homes52% of homes
Price per ft²pricier than$63867% of homes80% of homes
Living areabigger than1,262 ft²20% of homes23% of homes
Lot sizebigger than0.21 ac78% of homes36% of homes
Year builtnewer than19006% of homes15% of homes

About 9 Belknap St

How much is 9 Belknap St, Arlington, MA worth?

The TopHap Estimate for 9 Belknap St, Arlington, MA is $805,603 as of Sep 24, 2026. The likely range is $740,410 to $870,796. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 9 Belknap St, Arlington, MA last sell?

9 Belknap St, Arlington, MA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 9 Belknap St, Arlington, MA?

9 Belknap St, Arlington, MA has 3 bedrooms, 1.5 bathrooms and 1,262 square feet of living space.

When was 9 Belknap St, Arlington, MA built?

9 Belknap St, Arlington, MA was built in 1900, making it 126 years old. It is a condo/apartment home. The building has 2 stories.

What schools serve 9 Belknap St, Arlington, MA?

9 Belknap St, Arlington, MA is assigned to R.J. Hardy Elementary School (elementary), rated B; Arlington High School (high), 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 9 Belknap St, Arlington, MA compare to other homes in Arlington 02474?

Among the 8,570 homes in Arlington 02474, it is worth more than 24% of them ($805,603 against a typical $1,027,626), its price per square foot is higher than 67% of them ($638 against a typical $590), it is bigger than 20% of them (1,262 ft² against a typical 1,973 ft²), its lot is bigger than 78% of them (0.21 ac against a typical 0.14 ac) and it is newer than 6% of them (1900 against a typical 1933). Measured against all of Middlesex County, it is worth more than 52% 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 9 Belknap St, Arlington, MA?

The 2025 property tax bill for 9 Belknap St, Arlington, MA was $8,307. The county assessed it at $771,300.

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