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Single Family ResidenceResidential
$4,552,677$1,018 / 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 Jul 14, 2026
Last sold for $2,125,000 on Jul 20, 2011

40 COMMON ST

BELMONT, MA 02478
4
Beds
4.5
Baths
4,473 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.
0.94 ac
Lot SizeThe size of the land the home sits on, from county records.
2011
Year BuiltThe year the home was originally built, according to county records.
2
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

$4.6M
$4.4M low$4.7M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$2,125,000 · Jul 20, 2011
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$2,532,677
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$2,026,142
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.43%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$1,720,000
FIRST REPUBLIC BANK · 2.75% 1 · recorded Nov 4, 2021
2nd MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$300,000
CENTURY BANK & TRUST

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$48,704 (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.$4,276,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,245,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$3,031,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$3,365,565

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.19 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.Colonial
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.94
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
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.

E
Roger E WellingtonA
Elementary · Grades PK–3 · 0.2 mi
H
Belmont High SchoolA+
High · Grades 9–12 · 0.5 mi
M
Winthrop L Chenery Upper Elementary SchoolA-
Middle · Grades 4–6 · 0.6 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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.Yes

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

40 Common 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.

  • Among the most valuable homes in Belmont 02478
  • Costs more per square foot than 97% of homes in Middlesex County
  • Bigger than 98% of homes in Belmont 02478
  • Has a bigger lot than 93% of homes in Belmont 02478
  • Newer than 97% of homes in Belmont 02478

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
$616K$3.7M

This home is worth more than almost all 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$4,552,677
CheaperTypical $1,482,948Pricier

Pricier than almost all homes nearby

Price per ft²$1018
CheaperTypical $746Pricier

Pricier than 96% of homes nearby

Living area4,473 ft²
SmallerTypical 2,117 ft²Bigger

Bigger than 98% of homes nearby

Lot size0.94 ac
SmallerTypical 0.16 acBigger

Bigger than 93% of homes nearby

Year built2011
OlderTypical 1930Newer

Newer than 97% of homes nearby

How 40 Common St ranks against every home in each area.
MeasureThis homeBelmont 02478Middlesex County
Estimated valuepricier than$4,552,677almost all homesalmost all homes
Price per ft²pricier than$101896% of homes97% of homes
Living areabigger than4,473 ft²98% of homes97% of homes
Lot sizebigger than0.94 ac93% of homes78% of homes
Year builtnewer than201197% of homes95% of homes

About 40 Common St

How much is 40 Common St, Belmont, MA worth?

The TopHap Estimate for 40 Common St, Belmont, MA is $4,552,677 as of Jul 14, 2026. The likely range is $4,380,619 to $4,724,735. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 40 Common St, Belmont, MA last sell?

40 Common St, Belmont, MA last sold on Jul 20, 2011 for $2,125,000, according to the county's recorded deed.

How big is 40 Common St, Belmont, MA?

40 Common St, Belmont, MA has 4 bedrooms, 4.5 bathrooms, 4,473 square feet of living space and a 0.94-acre lot.

When was 40 Common St, Belmont, MA built?

40 Common St, Belmont, MA was built in 2011, making it 15 years old. It is a colonial home. The building has 2 stories.

What schools serve 40 Common St, Belmont, MA?

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

How does 40 Common St, Belmont, MA compare to other homes in Belmont 02478?

Among the 7,995 homes in Belmont 02478, it is worth more than almost all of them ($4,552,677 against a typical $1,482,948), its price per square foot is higher than 96% of them ($1018 against a typical $746), it is bigger than 98% of them (4,473 ft² against a typical 2,117 ft²), its lot is bigger than 93% of them (0.94 ac against a typical 0.16 ac) and it is newer than 97% of them (2011 against a typical 1930). Measured against all of Middlesex County, it is worth more than almost all 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 40 Common St, Belmont, MA?

The 2025 property tax bill for 40 Common St, Belmont, MA was $48,704. The county assessed it at $4,276,000.

Closest homes

More homes in Belmont 02478

Assigned schools

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