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Single Family ResidenceResidential
$940,269$595 / 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 96How 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 $400,000 on Nov 27, 2000

121 THESDA ST

ARLINGTON, MA 02474
3
Beds
1.5
Baths
1,580 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.
1970
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$940K
$905K low$975K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$400,000 · Nov 27, 2000

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,096 (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.$946,200 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$579,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$366,600
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$903,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$991,358

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.14 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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
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.1976
Lot (acres)The size of the land the home sits on, from county records.0.21
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.Electric
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No
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(6)

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
Peirce Elementary SchoolA
Elementary · Grades KG–5 · 0.4 mi
M
Ottoson Middle SchoolA+
Middle · Grades 7–8 · 0.9 mi
H
Arlington High SchoolA+
High · Grades 9–12 · 1.4 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

121 Thesda 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 more than 67% of homes in Middlesex County
  • Costs more per square foot than 76% of homes in Middlesex County
  • Smaller than 67% of homes in Arlington 02474
  • Has a bigger lot than 77% of homes in Arlington 02474
  • Newer than 87% 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
$337K$2.1M

This home is worth more than 40% 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$940,269
CheaperTypical $1,017,264Pricier

Pricier than 40% of homes nearby

Price per ft²$595
CheaperTypical $580Pricier

Pricier than 56% of homes nearby

Living area1,580 ft²
SmallerTypical 1,980 ft²Bigger

Bigger than 33% of homes nearby

Lot size0.21 ac
SmallerTypical 0.14 acBigger

Bigger than 77% of homes nearby

Year built1970
OlderTypical 1932Newer

Newer than 87% of homes nearby

How 121 Thesda St ranks against every home in each area.
MeasureThis homeArlington 02474Middlesex County
Estimated valuepricier than$940,26940% of homes67% of homes
Price per ft²pricier than$59556% of homes76% of homes
Living areabigger than1,580 ft²33% of homes38% of homes
Lot sizebigger than0.21 ac77% of homes35% of homes
Year builtnewer than197087% of homes64% of homes

About 121 Thesda St

How much is 121 Thesda St, Arlington, MA worth?

The TopHap Estimate for 121 Thesda St, Arlington, MA is $940,269 as of Oct 21, 2026. The likely range is $905,468 to $975,070. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 121 Thesda St, Arlington, MA last sell?

121 Thesda St, Arlington, MA last sold on Nov 27, 2000 for $400,000, according to the county's recorded deed.

How big is 121 Thesda St, Arlington, MA?

121 Thesda St, Arlington, MA has 3 bedrooms, 1.5 bathrooms, 1,580 square feet of living space and a 0.21-acre lot.

When was 121 Thesda St, Arlington, MA built?

121 Thesda St, Arlington, MA was built in 1970, making it 56 years old. The building has 2 stories.

What schools serve 121 Thesda St, Arlington, MA?

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

How does 121 Thesda St, Arlington, MA compare to other homes in Arlington 02474?

Among the 8,570 homes in Arlington 02474, it is worth more than 40% of them ($940,269 against a typical $1,017,264), its price per square foot is higher than 56% of them ($595 against a typical $580), it is bigger than 33% of them (1,580 ft² against a typical 1,980 ft²), its lot is bigger than 77% of them (0.21 ac against a typical 0.14 ac) and it is newer than 87% of them (1970 against a typical 1932). Measured against all of Middlesex County, it is worth more than 67% 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 121 Thesda St, Arlington, MA?

The 2026 property tax bill for 121 Thesda St, Arlington, MA was $10,096. The county assessed it at $946,200.

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