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Single Family ResidenceResidential
$865,872$332 / 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 93How 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
Last sold for $725,000 on Aug 26, 2020

121 THORNTON RD

WALTHAM, MA 02453
3
Beds
1.5
Baths
2,611 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.
1932
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

$866K
$809K low$922K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$725,000 · Aug 26, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,236 (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.$798,100 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$414,800
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$383,300
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$751,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$844,178

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.Colonial
CountyMIDDLESEX
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.Hot Water
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, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(12)

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
William F. Stanley Elementary SchoolC
Elementary · Grades KG–5 · 0.8 mi
M
John W. McDevitt Middle SchoolC
Middle · Grades 6–8 · 1.8 mi
H
Waltham Sr High SchoolD+
High · Grades 9–12 · 2.5 mi

District: Waltham School District

Neighborhood · ZIP 02453These 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.106
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.73

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.8%
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.32,080
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.8,464 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$106,981
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$136,606
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 Thornton 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.

  • Worth more than 72% of homes in Cedarwood
  • Costs less per square foot than 94% of homes in Waltham 02453
  • Bigger than 90% of homes in Cedarwood
  • Has a smaller lot than 75% of homes in Middlesex County
  • Older than 78% of homes in Cedarwood

What homes are worth in Waltham 02453

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

This home
$348K$1.3M

This home is worth more than 68% of homes in Waltham 02453.

How it measures up in Waltham 02453

The dot is this home. The mark in the middle is the typical home in Waltham 02453.

Estimated value$865,872
CheaperTypical $784,682Pricier

Pricier than 68% of homes nearby

Price per ft²$332
CheaperTypical $491Pricier

Pricier than 6% of homes nearby

Living area2,611 ft²
SmallerTypical 1,859 ft²Bigger

Bigger than 76% of homes nearby

Lot size0.15 ac
SmallerTypical 0.15 acBigger

Bigger than 50% of homes nearby

Year built1932
OlderTypical 1930Newer

Newer than 51% of homes nearby

How 121 Thornton Rd ranks against every home in each area.
MeasureThis homeCedarwoodWaltham 02453Middlesex County
Estimated valuepricier than$865,87272% of homes68% of homes60% of homes
Price per ft²pricier than$3328% of homes6% of homes15% of homes
Living areabigger than2,611 ft²90% of homes76% of homes77% of homes
Lot sizebigger than0.15 ac62% of homes50% of homes25% of homes
Year builtnewer than193222% of homes51% of homes33% of homes

About 121 Thornton Rd

How much is 121 Thornton Rd, Waltham, MA worth?

The TopHap Estimate for 121 Thornton Rd, Waltham, MA is $865,872 as of Sep 24, 2026. The likely range is $809,323 to $922,421. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 121 Thornton Rd, Waltham, MA last sell?

121 Thornton Rd, Waltham, MA last sold on Aug 26, 2020 for $725,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 121 Thornton Rd, Waltham, MA?

121 Thornton Rd, Waltham, MA has 3 bedrooms, 1.5 bathrooms, 2,611 square feet of living space and a 0.15-acre lot.

When was 121 Thornton Rd, Waltham, MA built?

121 Thornton Rd, Waltham, MA was built in 1932, making it 94 years old. It is a colonial home. The building has 2 stories.

What schools serve 121 Thornton Rd, Waltham, MA?

121 Thornton Rd, Waltham, MA is assigned to William F. Stanley Elementary School (elementary), rated C; John W. McDevitt Middle School (middle), rated C; Waltham Sr High School (high), rated D+. All sit in Waltham School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 121 Thornton Rd, Waltham, MA compare to other homes in Waltham 02453?

Among the 6,296 homes in Waltham 02453, it is worth more than 68% of them ($865,872 against a typical $784,682), its price per square foot is higher than 6% of them ($332 against a typical $491), it is bigger than 76% of them (2,611 ft² against a typical 1,859 ft²), its lot is bigger than 50% of them (0.15 ac against a typical 0.15 ac) and it is newer than 51% of them (1932 against a typical 1930). Measured against all of Middlesex County, it is worth more than 60% 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 Thornton Rd, Waltham, MA?

The 2026 property tax bill for 121 Thornton Rd, Waltham, MA was $8,236. The county assessed it at $798,100.

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