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Single Family ResidenceResidential
$1,446,295$570 / 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

21 BELMONT ST

NEWTON, MA 02458
5
Beds
2.5
Baths
2,539 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.
0.14 ac
Lot SizeThe size of the land the home sits on, from county records.
1866
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.

Valuation

$1.4M
$1.4M low$1.5M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$14,267 (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.$1,472,300 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,009,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$462,600
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,402,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,454,640

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.Victorian
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.14
ConstructionThe main material the home's frame and walls are built from.Brick
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Steam
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(13)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Foreclosure Filings(1)

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

M
Bigelow Middle SchoolA
Middle · Grades 6–8 · 0.1 mi
E
Underwood Elementary SchoolA
Elementary · Grades KG–5 · 0.3 mi
H
Newton North High SchoolA+
High · Grades 9–12 · 1.6 mi

District: Newton School District

Neighborhood · ZIP 02458These 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.97
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.108
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.70

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.4.2%
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.14,080
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.6,870 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$143,714
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$186,633
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%

Owner Tools

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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 Belmont 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 88% of homes in Middlesex County
  • Costs less per square foot than 77% of homes in Newton Corner
  • Bigger than 75% of homes in Middlesex County
  • Has a smaller lot than 82% of homes in Newton Corner
  • Older than 98% of homes in Middlesex County

What homes are worth in Newton 02458

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

This home
$457K$4.2M

This home is worth more than 58% of homes in Newton 02458.

How it measures up in Newton 02458

The dot is this home. The mark in the middle is the typical home in Newton 02458.

Estimated value$1,446,295
CheaperTypical $1,296,937Pricier

Pricier than 58% of homes nearby

Price per ft²$570
CheaperTypical $653Pricier

Pricier than 25% of homes nearby

Living area2,539 ft²
SmallerTypical 2,242 ft²Bigger

Bigger than 61% of homes nearby

Lot size0.14 ac
SmallerTypical 0.19 acBigger

Bigger than 28% of homes nearby

Year built1866
OlderTypical 1920Newer

Newer than 5% of homes nearby

How 21 Belmont St ranks against every home in each area.
MeasureThis homeNewton CornerNewton 02458Middlesex County
Estimated valuepricier than$1,446,29545% of homes58% of homes88% of homes
Price per ft²pricier than$57023% of homes25% of homes72% of homes
Living areabigger than2,539 ft²53% of homes61% of homes75% of homes
Lot sizebigger than0.14 ac18% of homes28% of homes23% of homes
Year builtnewer than18664% of homes5% of homes2% of homes

About 21 Belmont St

How much is 21 Belmont St, Newton, MA worth?

The TopHap Estimate for 21 Belmont St, Newton, MA is $1,446,295 as of Oct 21, 2026. The likely range is $1,356,570 to $1,536,020. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Belmont St, Newton, MA last sell?

21 Belmont St, Newton, MA last sold on Jun 4, 2018, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 21 Belmont St, Newton, MA?

21 Belmont St, Newton, MA has 5 bedrooms, 2.5 bathrooms, 2,539 square feet of living space and a 0.14-acre lot.

When was 21 Belmont St, Newton, MA built?

21 Belmont St, Newton, MA was built in 1866, making it 160 years old. It is a victorian home. The building has 3 stories.

What schools serve 21 Belmont St, Newton, MA?

21 Belmont St, Newton, MA is assigned to Bigelow Middle School (middle), rated A; Underwood Elementary School (elementary), rated A; Newton North High School (high), rated A+. All sit in Newton School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Belmont St, Newton, MA compare to other homes in Newton 02458?

Among the 3,665 homes in Newton 02458, it is worth more than 58% of them ($1,446,295 against a typical $1,296,937), its price per square foot is higher than 25% of them ($570 against a typical $653), it is bigger than 61% of them (2,539 ft² against a typical 2,242 ft²), its lot is bigger than 28% of them (0.14 ac against a typical 0.19 ac) and it is newer than 5% of them (1866 against a typical 1920). Measured against all of Middlesex County, it is worth more than 88% 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 Belmont St, Newton, MA?

The 2026 property tax bill for 21 Belmont St, Newton, MA was $14,267. The county assessed it at $1,472,300.

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