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Single Family ResidenceResidential
$898,982$461 / 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
Last sold for $851,000 on Nov 30, 2023

423 MAIN ST

WALTHAM, MA 02452
4
Beds
1.5
Baths
1,948 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.
0.23 ac
Lot SizeThe size of the land the home sits on, from county records.
1910
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

$899K
$842K low$956K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$851,000 · Nov 30, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,126 (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.$690,500 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$424,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$266,500
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$685,300
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$797,630

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.23
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.Slate
HeatingThe type of heating system in the home.Steam
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(3)

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.

H
Waltham Sr High SchoolD+
High · Grades 9–12 · 1.2 mi
M
John F. Kennedy Middle SchoolB
Middle · Grades 6–8 · 1.4 mi
E
Northeast Elementary SchoolD+
Elementary · Grades KG–5 · 1.7 mi

District: Waltham School District

Neighborhood · ZIP 02452These 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.93
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 100.77

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.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.10.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.17,230
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,328 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$97,289
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$131,986
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

423 Main 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.

  • Costs more per square foot than 71% of homes in Bentley
  • Smaller than 71% of homes in Bentley
  • Has a bigger lot than 69% of homes in Bentley
  • Older than 93% of homes in Waltham 02452

What homes are worth in Waltham 02452

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

This home
$375K$1.8M

This home is worth more than 63% of homes in Waltham 02452.

How it measures up in Waltham 02452

The dot is this home. The mark in the middle is the typical home in Waltham 02452.

Estimated value$898,982
CheaperTypical $827,243Pricier

Pricier than 63% of homes nearby

Price per ft²$461
CheaperTypical $472Pricier

Pricier than 48% of homes nearby

Living area1,948 ft²
SmallerTypical 1,904 ft²Bigger

Bigger than 52% of homes nearby

Lot size0.23 ac
SmallerTypical 0.34 acBigger

Bigger than 35% of homes nearby

Year built1910
OlderTypical 1977Newer

Newer than 7% of homes nearby

How 423 Main St ranks against every home in each area.
MeasureThis homeBentleyWaltham 02452Middlesex County
Estimated valuepricier than$898,98243% of homes63% of homes63% of homes
Price per ft²pricier than$46171% of homes48% of homes50% of homes
Living areabigger than1,948 ft²29% of homes52% of homes55% of homes
Lot sizebigger than0.23 ac69% of homes35% of homes38% of homes
Year builtnewer than191033% of homes7% of homes20% of homes

About 423 Main St

How much is 423 Main St, Waltham, MA worth?

The TopHap Estimate for 423 Main St, Waltham, MA is $898,982 as of Oct 21, 2026. The likely range is $842,131 to $955,833. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 423 Main St, Waltham, MA last sell?

423 Main St, Waltham, MA last sold on Nov 30, 2023 for $851,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 423 Main St, Waltham, MA?

423 Main St, Waltham, MA has 4 bedrooms, 1.5 bathrooms, 1,948 square feet of living space and a 0.23-acre lot.

When was 423 Main St, Waltham, MA built?

423 Main St, Waltham, MA was built in 1910, making it 116 years old. The building has 2 stories.

What schools serve 423 Main St, Waltham, MA?

423 Main St, Waltham, MA is assigned to Waltham Sr High School (high), rated D+; John F. Kennedy Middle School (middle), rated B; Northeast Elementary School (elementary), rated D+. All sit in Waltham School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 423 Main St, Waltham, MA compare to other homes in Waltham 02452?

Among the 3,442 homes in Waltham 02452, it is worth more than 63% of them ($898,982 against a typical $827,243), its price per square foot is higher than 48% of them ($461 against a typical $472), it is bigger than 52% of them (1,948 ft² against a typical 1,904 ft²), its lot is bigger than 35% of them (0.23 ac against a typical 0.34 ac) and it is newer than 7% of them (1910 against a typical 1977). Measured against all of Middlesex County, it is worth more than 63% 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 423 Main St, Waltham, MA?

The 2026 property tax bill for 423 Main St, Waltham, MA was $7,126. The county assessed it at $690,500.

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