Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$1,219,908$792 / 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 $550,000 on May 28, 2009

21 MAYFIELD RD

BELMONT, MA 02478
3
Beds
2.5
Baths
1,540 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.
1934
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

$1.2M
$1.1M low$1.3M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$550,000 · May 28, 2009

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$13,133 (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.$1,153,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$709,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$444,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,046,045

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.Cape Cod
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
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(5)

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
Roger E WellingtonA
Elementary · Grades PK–3 · 1.3 mi
M
Winthrop L Chenery Upper Elementary SchoolA+
Middle · Grades 4–6 · 1.5 mi
H
Belmont High SchoolA+
High · Grades 9–12 · 1.6 mi

District: Belmont School District

Neighborhood · ZIP 02478These 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.55
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.103
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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.28%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.8%
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.27,636
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.5,959 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$162,650
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$213,185
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

Do you own this home?
Claim this home

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 Mayfield 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 81% of homes in Middlesex County
  • Costs more per square foot than 92% of homes in Middlesex County
  • Smaller than 78% of homes in Belmont 02478
  • Has a smaller lot than 76% of homes in Middlesex County
  • Older than 67% of homes in Middlesex County

What homes are worth in Belmont 02478

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

This home
$597K$3.6M

This home is worth more than 31% of homes in Belmont 02478.

How it measures up in Belmont 02478

The dot is this home. The mark in the middle is the typical home in Belmont 02478.

Estimated value$1,219,908
CheaperTypical $1,465,704Pricier

Pricier than 31% of homes nearby

Price per ft²$792
CheaperTypical $716Pricier

Pricier than 72% of homes nearby

Living area1,540 ft²
SmallerTypical 2,117 ft²Bigger

Bigger than 22% of homes nearby

Lot size0.15 ac
SmallerTypical 0.16 acBigger

Bigger than 44% of homes nearby

Year built1934
OlderTypical 1930Newer

Newer than 59% of homes nearby

How 21 Mayfield Rd ranks against every home in each area.
MeasureThis homeBelmont 02478Middlesex County
Estimated valuepricier than$1,219,90831% of homes81% of homes
Price per ft²pricier than$79272% of homes92% of homes
Living areabigger than1,540 ft²22% of homes37% of homes
Lot sizebigger than0.15 ac44% of homes24% of homes
Year builtnewer than193459% of homes33% of homes

About 21 Mayfield Rd

How much is 21 Mayfield Rd, Belmont, MA worth?

The TopHap Estimate for 21 Mayfield Rd, Belmont, MA is $1,219,908 as of Sep 24, 2026. The likely range is $1,132,145 to $1,307,671. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Mayfield Rd, Belmont, MA last sell?

21 Mayfield Rd, Belmont, MA last sold on May 28, 2009 for $550,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 21 Mayfield Rd, Belmont, MA?

21 Mayfield Rd, Belmont, MA has 3 bedrooms, 2.5 bathrooms, 1,540 square feet of living space and a 0.15-acre lot.

When was 21 Mayfield Rd, Belmont, MA built?

21 Mayfield Rd, Belmont, MA was built in 1934, making it 92 years old. It is a cape cod home. The building has 2 stories.

What schools serve 21 Mayfield Rd, Belmont, MA?

21 Mayfield Rd, Belmont, MA is assigned to Roger E Wellington (elementary), rated A; Winthrop L Chenery Upper Elementary School (middle), rated A+; Belmont High School (high), rated A+. All sit in Belmont School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Mayfield Rd, Belmont, MA compare to other homes in Belmont 02478?

Among the 7,995 homes in Belmont 02478, it is worth more than 31% of them ($1,219,908 against a typical $1,465,704), its price per square foot is higher than 72% of them ($792 against a typical $716), it is bigger than 22% of them (1,540 ft² against a typical 2,117 ft²), its lot is bigger than 44% of them (0.15 ac against a typical 0.16 ac) and it is newer than 59% of them (1934 against a typical 1930). Measured against all of Middlesex County, it is worth more than 81% 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 Mayfield Rd, Belmont, MA?

The 2025 property tax bill for 21 Mayfield Rd, Belmont, MA was $13,133. The county assessed it at $1,153,000.

More homes on Mayfield Rd

Closest homes

More homes in Belmont 02478

Assigned schools

Explore the area

See this home in context

Open 21 Mayfield Rd on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map