Skip to content
Skip to content
TopHapOpen in map
Industrial (General)Industrial

20 CLEMATIS AVE

WALTHAM, MA 02453
2
Beds
1.5
Baths
9,848 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.
0.24 ac
Lot SizeThe size of the land the home sits on, from county records.
1950
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.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$23,975 (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.$1,139,500 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$339,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$800,200

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.102 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.34%
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.1 percent flood zone

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Industrial (General)
StyleThe architectural style of the home, such as ranch or colonial.Ranch
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.24
ConstructionThe main material the home's frame and walls are built from.Concrete
RoofThe main material covering the roof, such as asphalt shingle or tile.Roll Tar & Gravel
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
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
James Fitzgerald Elementary SchoolB-
Elementary · Grades KG–5 · 0.3 mi
M
John W. McDevitt Middle SchoolB
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 02453These 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.106
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.73

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.94%
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.6.8%
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.32,080
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.8,464 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$106,981
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$136,606
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.Absentee owner
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

20 Clematis 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 Warrendale
  • Has a bigger lot than 84% of homes in Warrendale
  • Newer than 72% of homes in Warrendale

How it measures up in Waltham 02453

The dot is this home. The mark in the middle is the typical home in Waltham 02453.

Living area9,848 ft²
SmallerTypical 1,870 ft²Bigger

Bigger than almost all homes nearby

Lot size0.24 ac
SmallerTypical 0.15 acBigger

Bigger than 83% of homes nearby

Year built1950
OlderTypical 1930Newer

Newer than 71% of homes nearby

How 20 Clematis Ave ranks against every home in each area.
MeasureThis homeWarrendaleWaltham 02453Middlesex County
Living areabigger than9,848 ft²almost all homesalmost all homesalmost all homes
Lot sizebigger than0.24 ac84% of homes83% of homes41% of homes
Year builtnewer than195072% of homes71% of homes42% of homes

About 20 Clematis Ave

When did 20 Clematis Ave, Waltham, MA last sell?

20 Clematis Ave, Waltham, MA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 20 Clematis Ave, Waltham, MA?

20 Clematis Ave, Waltham, MA has 2 bedrooms, 1.5 bathrooms, 9,848 square feet of living space and a 0.24-acre lot.

When was 20 Clematis Ave, Waltham, MA built?

20 Clematis Ave, Waltham, MA was built in 1950, making it 76 years old. It is a ranch home. The building has 2 stories.

What schools serve 20 Clematis Ave, Waltham, MA?

20 Clematis Ave, Waltham, MA is assigned to James Fitzgerald Elementary School (elementary), rated B-; John W. McDevitt Middle School (middle), rated B; 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 20 Clematis Ave, Waltham, MA compare to other homes in Waltham 02453?

Among the 6,296 homes in Waltham 02453, it is bigger than almost all of them (9,848 ft² against a typical 1,870 ft²), its lot is bigger than 83% of them (0.24 ac against a typical 0.15 ac) and it is newer than 71% of them (1950 against a typical 1930). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 20 Clematis Ave, Waltham, MA?

The 2025 property tax bill for 20 Clematis Ave, Waltham, MA was $23,975. The county assessed it at $1,139,500.

Closest homes

More homes in Waltham 02453

Assigned schools

Explore the area

See this home in context

Open 20 Clematis Ave 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