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Single Family ResidenceResidential
$1,209,387$640 / 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 95How 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 $585,000 on Dec 5, 2008

634 WALTHAM ST

LEXINGTON, MA 02421
4
Beds
1.5
Baths
1,890 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.
0.46 ac
Lot SizeThe size of the land the home sits on, from county records.
1924
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

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.$585,000 · Dec 5, 2008
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.$557,387
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$445,910
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.58%
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.$327,000
GUARANTEED RATE INC · R · recorded Nov 27, 2019
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.$325,000
GUARANTEED RATE INC

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$13,245 (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.$1,083,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$616,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$467,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,196,905

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.Conventional
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.46
RoofThe main material covering the roof, such as asphalt shingle or tile.Slate
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

Transaction History(9)

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
Clarke Middle SchoolA
Middle · Grades 6–8 · 0.1 mi
E
Bridge Elementary SchoolA
Elementary · Grades KG–5 · 1.0 mi
H
Lexingon High SchoolA+
High · Grades 9–12 · 1.1 mi

District: Lexington School District

Neighborhood · ZIP 02421These 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 100.80

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.1%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.18,851
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,009 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$178,785
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$233,901
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.No

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

634 Waltham 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 80% of homes in Middlesex County
  • Costs more per square foot than 80% of homes in Middlesex County
  • Has a bigger lot than 70% of homes in Lexington 02421
  • Older than 87% of homes in Lexington 02421

What homes are worth in Lexington 02421

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

This home
$793K$3.4M

This home is worth more than 24% of homes in Lexington 02421.

How it measures up in Lexington 02421

The dot is this home. The mark in the middle is the typical home in Lexington 02421.

Estimated value$1,209,387
CheaperTypical $1,536,014Pricier

Pricier than 24% of homes nearby

Price per ft²$640
CheaperTypical $688Pricier

Pricier than 35% of homes nearby

Living area1,890 ft²
SmallerTypical 2,220 ft²Bigger

Bigger than 36% of homes nearby

Lot size0.46 ac
SmallerTypical 0.36 acBigger

Bigger than 70% of homes nearby

Year built1924
OlderTypical 1958Newer

Newer than 13% of homes nearby

How 634 Waltham St ranks against every home in each area.
MeasureThis homeLexington 02421Middlesex County
Estimated valuepricier than$1,209,38724% of homes80% of homes
Price per ft²pricier than$64035% of homes80% of homes
Living areabigger than1,890 ft²36% of homes53% of homes
Lot sizebigger than0.46 ac70% of homes62% of homes
Year builtnewer than192413% of homes27% of homes

About 634 Waltham St

How much is 634 Waltham St, Lexington, MA worth?

The TopHap Estimate for 634 Waltham St, Lexington, MA is $1,209,387 as of Jul 14, 2026. The likely range is $1,143,364 to $1,275,410. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 634 Waltham St, Lexington, MA last sell?

634 Waltham St, Lexington, MA last sold on Dec 5, 2008 for $585,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 634 Waltham St, Lexington, MA?

634 Waltham St, Lexington, MA has 4 bedrooms, 1.5 bathrooms, 1,890 square feet of living space and a 0.46-acre lot.

When was 634 Waltham St, Lexington, MA built?

634 Waltham St, Lexington, MA was built in 1924, making it 102 years old. It is a conventional home. The building has 2 stories.

What schools serve 634 Waltham St, Lexington, MA?

634 Waltham St, Lexington, MA is assigned to Clarke Middle School (middle), rated A; Bridge Elementary School (elementary), rated A; Lexingon High School (high), rated A+. All sit in Lexington School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 634 Waltham St, Lexington, MA compare to other homes in Lexington 02421?

Among the 5,257 homes in Lexington 02421, it is worth more than 24% of them ($1,209,387 against a typical $1,536,014), its price per square foot is higher than 35% of them ($640 against a typical $688), it is bigger than 36% of them (1,890 ft² against a typical 2,220 ft²), its lot is bigger than 70% of them (0.46 ac against a typical 0.36 ac) and it is newer than 13% of them (1924 against a typical 1958). Measured against all of Middlesex County, it is worth more than 80% 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 634 Waltham St, Lexington, MA?

The 2025 property tax bill for 634 Waltham St, Lexington, MA was $13,245. The county assessed it at $1,083,000.

Closest homes

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Assigned schools

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