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Single Family ResidenceResidential
$1,064,901$676 / 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 Jul 14, 2026
Last sold for $739,000 on Sep 20, 2017

21 MOSMAN ST

WEST NEWTON, MA 02465
3
Beds
1.5
Baths
1,576 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.
0.18 ac
Lot SizeThe size of the land the home sits on, from county records.
1954
Year BuiltThe year the home was originally built, according to county records.
1
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

$1.1M
$995K low$1.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$739,000 · Sep 20, 2017

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,203 (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.$837,000 (2025)
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,126,035

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.7 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
StyleThe architectural style of the home, such as ranch or colonial.Ranch
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.18
ConstructionThe main material the home's frame and walls are built from.Steel Frame
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
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(2)

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.

M
F. A. Day Middle SchoolA
Middle · Grades 6–8 · 0.3 mi
E
Horace Mann Elementary SchoolB
Elementary · Grades KG–5 · 0.5 mi
H
Newton North High SchoolA+
High · Grades 9–12 · 1.2 mi

District: Newton School District

Neighborhood · ZIP 02465These 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.59
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.105
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.74

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.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.13,311
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.5,877 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$170,293
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$229,449
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%

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 Mosman 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 73% of homes in West Newton 02465
  • Costs more per square foot than 85% of homes in Middlesex County
  • Smaller than 75% of homes in West Newton 02465
  • Has a smaller lot than 69% of homes in Middlesex County
  • Newer than 81% of homes in West Newton 02465

What homes are worth in West Newton 02465

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

This home
$665K$5.5M

This home is worth more than 27% of homes in West Newton 02465.

How it measures up in West Newton 02465

The dot is this home. The mark in the middle is the typical home in West Newton 02465.

Estimated value$1,064,901
CheaperTypical $1,348,309Pricier

Pricier than 27% of homes nearby

Price per ft²$676
CheaperTypical $698Pricier

Pricier than 43% of homes nearby

Living area1,576 ft²
SmallerTypical 2,144 ft²Bigger

Bigger than 25% of homes nearby

Lot size0.18 ac
SmallerTypical 0.2 acBigger

Bigger than 41% of homes nearby

Year built1954
OlderTypical 1930Newer

Newer than 81% of homes nearby

How 21 Mosman St ranks against every home in each area.
MeasureThis homeWest Newton 02465Middlesex County
Estimated valuepricier than$1,064,90127% of homes73% of homes
Price per ft²pricier than$67643% of homes85% of homes
Living areabigger than1,576 ft²25% of homes39% of homes
Lot sizebigger than0.18 ac41% of homes31% of homes
Year builtnewer than195481% of homes45% of homes

About 21 Mosman St

How much is 21 Mosman St, West Newton, MA worth?

The TopHap Estimate for 21 Mosman St, West Newton, MA is $1,064,901 as of Jul 14, 2026. The likely range is $995,015 to $1,134,787. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Mosman St, West Newton, MA last sell?

21 Mosman St, West Newton, MA last sold on Sep 20, 2017 for $739,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 21 Mosman St, West Newton, MA?

21 Mosman St, West Newton, MA has 3 bedrooms, 1.5 bathrooms, 1,576 square feet of living space and a 0.18-acre lot.

When was 21 Mosman St, West Newton, MA built?

21 Mosman St, West Newton, MA was built in 1954, making it 72 years old. It is a ranch home. The building has 1 story.

What schools serve 21 Mosman St, West Newton, MA?

21 Mosman St, West Newton, MA is assigned to F. A. Day Middle School (middle), rated A; Horace Mann Elementary School (elementary), rated B; 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 Mosman St, West Newton, MA compare to other homes in West Newton 02465?

Among the 3,799 homes in West Newton 02465, it is worth more than 27% of them ($1,064,901 against a typical $1,348,309), its price per square foot is higher than 43% of them ($676 against a typical $698), it is bigger than 25% of them (1,576 ft² against a typical 2,144 ft²), its lot is bigger than 41% of them (0.18 ac against a typical 0.2 ac) and it is newer than 81% of them (1954 against a typical 1930). Measured against all of Middlesex County, it is worth more than 73% 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 Mosman St, West Newton, MA?

The 2025 property tax bill for 21 Mosman St, West Newton, MA was $8,203. The county assessed it at $837,000.

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