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Office BuildingCommercial
Last sold for $59,300,000 on Dec 22, 2005

300 5TH AVE

WALTHAM, MA 02451
26
Baths
167,686 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.
4.3 ac
Lot SizeThe size of the land the home sits on, from county records.
1979
Year BuiltThe year the home was originally built, according to county records.
7
StoriesHow many floors the home has above ground.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$59,300,000 · Dec 22, 2005

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$720,031 (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.$34,222,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$5,619,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$28,602,300
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$34,222,000

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Office Building
CountyMiddlesex
Lot (acres)The size of the land the home sits on, from county records.4.30
ConstructionThe main material the home's frame and walls are built from.Steel Frame
HeatingThe type of heating system in the home.Electric
CoolingThe type of cooling or air conditioning in the home.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Thomas R Plympton Elementary SchoolC
Elementary · Grades KG–5 · 0.9 mi
M
John F. Kennedy Middle SchoolA-
Middle · Grades 6–8 · 1.4 mi
H
Waltham Sr High SchoolC
High · Grades 9–12 · 1.5 mi

District: Waltham School District

Neighborhood · ZIP 02451These 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.84
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 100.76

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.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.7%
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.16,966
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,036 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$126,384
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$156,140
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

300 5th Ave 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 largest homes in Waltham 02451
  • Among the largest lots in West Waltham
  • Newer than 75% of homes in Waltham 02451

How it measures up in Waltham 02451

The dot is this home. The mark in the middle is the typical home in Waltham 02451.

Living area167,686 ft²
SmallerTypical 1,778 ft²Bigger

Bigger than almost all homes nearby

Lot size4.3 ac
SmallerTypical 0.18 acBigger

Bigger than almost all homes nearby

Year built1979
OlderTypical 1957Newer

Newer than 75% of homes nearby

How 300 5th Ave ranks against every home in each area.
MeasureThis homeWest WalthamWaltham 02451Middlesex County
Living areabigger than167,686 ft²almost all homesalmost all homesalmost all homes
Lot sizebigger than4.3 acalmost all homesalmost all homes94% of homes
Year builtnewer than197974% of homes75% of homes72% of homes

About 300 5th Ave

When did 300 5th Ave, Waltham, MA last sell?

300 5th Ave, Waltham, MA last sold on Dec 22, 2005 for $59,300,000, according to the county's recorded deed.

How big is 300 5th Ave, Waltham, MA?

300 5th Ave, Waltham, MA has 26 bathrooms, 167,686 square feet of living space and a 4.30-acre lot.

When was 300 5th Ave, Waltham, MA built?

300 5th Ave, Waltham, MA was built in 1979, making it 47 years old. The building has 7 stories.

What schools serve 300 5th Ave, Waltham, MA?

300 5th Ave, Waltham, MA is assigned to Thomas R Plympton Elementary School (elementary), rated C; John F. Kennedy Middle School (middle), rated A-; Waltham Sr High School (high), rated C. All sit in Waltham School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 300 5th Ave, Waltham, MA compare to other homes in Waltham 02451?

Among the 4,967 homes in Waltham 02451, it is bigger than almost all of them (167,686 ft² against a typical 1,778 ft²), its lot is bigger than almost all of them (4.3 ac against a typical 0.18 ac) and it is newer than 75% of them (1979 against a typical 1957). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 300 5th Ave, Waltham, MA?

The 2025 property tax bill for 300 5th Ave, Waltham, MA was $720,031. The county assessed it at $34,222,000.

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Assigned schools

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