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CondominiumResidential
$443,044$548 / 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 89How 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 $91,000 on Sep 3, 1997

20 RIVERSIDE ST

WATERTOWN, MA 02472
Building report
2
Beds
1
Baths
809 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.
1.79 ac
Lot SizeThe size of the land the home sits on, from county records.
1962
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$443K
$394K low$493K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$91,000 · Sep 3, 1997

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,884 (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.$400,300 (2026)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$400,300
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$363,375

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.48 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
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.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyMIDDLESEX
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.Roll Tar & Gravel
HeatingThe type of heating system in the home.Hot Water
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

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
Watertown High SchoolC+
High · Grades 9–12 · 0.5 mi
M
Watertown Middle SchoolB-
Middle · Grades 6–8 · 0.7 mi
E
Hosmer Elementary SchoolB
Elementary · Grades PK–5 · 0.8 mi

District: Watertown School District

Neighborhood · ZIP 02472These 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.112
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 100.71

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.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.6%
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.35,928
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.8,689 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$115,227
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$149,103
Average tempThe average temperature here across a full year.50°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

20 Riverside 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 less than 92% of homes in Watertown 02472
  • Costs more per square foot than 69% of homes in Middlesex County
  • Smaller than 95% of homes in Middlesex County
  • Among the largest lots in Downtown Watertown
  • Newer than 78% of homes in Watertown 02472

What homes are worth in Watertown 02472

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

This home
$372K$1.8M

This home is worth more than 8% of homes in Watertown 02472.

How it measures up in Watertown 02472

The dot is this home. The mark in the middle is the typical home in Watertown 02472.

Estimated value$443,044
CheaperTypical $811,593Pricier

Pricier than 8% of homes nearby

Price per ft²$548
CheaperTypical $584Pricier

Pricier than 37% of homes nearby

Living area809 ft²
SmallerTypical 1,728 ft²Bigger

Bigger than 7% of homes nearby

Lot size1.79 ac
SmallerTypical 0.14 acBigger

Bigger than 88% of homes nearby

Year built1962
OlderTypical 1930Newer

Newer than 78% of homes nearby

How 20 Riverside St ranks against every home in each area.
MeasureThis homeDowntown WatertownWatertown 02472Middlesex County
Estimated valuepricier than$443,04437% of homes8% of homes10% of homes
Price per ft²pricier than$54852% of homes37% of homes69% of homes
Living areabigger than809 ft²26% of homes7% of homes5% of homes
Lot sizebigger than1.79 acalmost all homes88% of homes86% of homes
Year builtnewer than196259% of homes78% of homes56% of homes

About 20 Riverside St

How much is 20 Riverside St, Watertown, MA worth?

The TopHap Estimate for 20 Riverside St, Watertown, MA is $443,044 as of Oct 21, 2026. The likely range is $393,574 to $492,514. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20 Riverside St, Watertown, MA last sell?

20 Riverside St, Watertown, MA last sold on Sep 3, 1997 for $91,000, according to the county's recorded deed.

How big is 20 Riverside St, Watertown, MA?

20 Riverside St, Watertown, MA has 2 bedrooms, 1 bathrooms and 809 square feet of living space.

When was 20 Riverside St, Watertown, MA built?

20 Riverside St, Watertown, MA was built in 1962, making it 64 years old. It is a condo/apartment home. The building has 1 story.

What schools serve 20 Riverside St, Watertown, MA?

20 Riverside St, Watertown, MA is assigned to Watertown High School (high), rated C+; Watertown Middle School (middle), rated B-; Hosmer Elementary School (elementary), rated B. All sit in Watertown School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20 Riverside St, Watertown, MA compare to other homes in Watertown 02472?

Among the 10,041 homes in Watertown 02472, it is worth more than 8% of them ($443,044 against a typical $811,593), its price per square foot is higher than 37% of them ($548 against a typical $584), it is bigger than 7% of them (809 ft² against a typical 1,728 ft²), its lot is bigger than 88% of them (1.79 ac against a typical 0.14 ac) and it is newer than 78% of them (1962 against a typical 1930). Measured against all of Middlesex County, it is worth more than 10% 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 20 Riverside St, Watertown, MA?

The 2026 property tax bill for 20 Riverside St, Watertown, MA was $4,884. The county assessed it at $400,300.

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