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CondominiumResidential

20 Riverside St

WATERTOWN, MA 02472
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.
Built 196230 units421–809 ft²
$12M
All units combinedThe sum of our current value estimates for every unit in the building — roughly what the whole building's homes are worth together.
$404K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$564
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

+9.1%vs the Watertown ZIP median sale $/ft² ($517)

Sales Performance

—
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
—
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
0
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
0.0%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+4.4%per yeartypical hold 7.6 yrsfrom 17 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
19871990199720002004201120192024
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
19871990199720002004201120192024

39 arms-length sales on record for this building.

Unit Mix & Floor PlansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.

Every unit: size vs estimated valueEvery unit in the building as one dot: across is its size, up is our current value estimate, and color is its bedroom count. Vertical columns of dots are recurring floor plans; the height spread within a column shows how much floor, view and condition move prices for the same layout.
$317K$374K$431K$488K421 ft²499 ft²576 ft²654 ft²731 ft²809 ft²
Studio1 bd2 bd
Studio
7 units
1 bed
10 units
2 bed
13 units
Recurring floor plansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.
2 bd · 1 ba · 809 ft²
13 units
1 bd · 1 ba · 692 ft²
7 units
Studio · 1 ba · 421 ft²
4 units
Studio · 1 ba · 481 ft²
2 units
One-off layouts
4 units

Value DistributionHow the building's units spread across value ranges by our current estimates. A wide spread usually means big differences in size, floor or view.

$317K–$326K
3 units
$342K–$354K
3 units
$369K–$374K
2 units
$387K–$399K
5 units
$402K–$406K
4 units
$428K–$444K
11 units
$446K–$446K
1 unit
$488K–$488K
1 unit

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.47%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.37%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.25.4 yrs
Cash purchases (5 yrs)The share of purchases in the last 5 years with no mortgage recorded. High cash share is common in second-home and investor buildings.0%
Avg. loan-to-valueAverage current loan balance against unit value across the building. Low numbers mean owners hold lots of equity — a sign of financial stability.34%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$402,375
Median tax billThe middle annual property tax bill among the building's units.$4,378
Pre-foreclosure noticesUnits with an active pre-foreclosure or foreclosure notice on file.0

Recent SalesThe latest recorded arms-length sales in the building, newest first.

Unit 3-6Oct 22, 2024$363,636Unit 1-1Jul 22, 2022$425,000Unit G-4Apr 29, 2021$312,475Unit 1-7Jul 29, 2019$392,500Unit 3-8Jul 16, 2018$391,000Unit 1-3Apr 18, 2018$267,000Unit 2-6Jan 27, 2017$195,000Unit G-5Aug 15, 2012$158,000Unit 1-2Mar 21, 2011$176,500Unit G-4Jul 16, 2008$206,500

Values are TopHap estimates, not appraisals. Sales, ownership and tax figures come from recorded county documents via ATTOM and can lag by several weeks.

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

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

H
Watertown High SchoolB-
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%

All UnitsEvery property record the county has at this street address, such as the units in a condo building. Prices shown are our estimates, not asking prices.

20 Riverside St # G-1
1 bd · 1 ba · 686 ft²
$402K
20 Riverside St # G-2
1 ba · 421 ft²
$317K
20 Riverside St # G-3
1 ba · 477 ft²
$354K
20 Riverside St # G-4
1 bd · 1 ba · 692 ft²
$349K
20 Riverside St # G-5
1 ba · 481 ft²
$374K
20 Riverside St # G-6
2 bd · 1 ba · 809 ft²
$444K
20 Riverside St # 1-1
2 bd · 1 ba · 809 ft²
$432K
20 Riverside St # 1-2
2 bd · 1 ba · 809 ft²
$430K
20 Riverside St # 1-3
1 ba · 421 ft²
$387K
20 Riverside St # 1-4
1 bd · 1 ba · 692 ft²
$394K
20 Riverside St # 1-5
1 bd · 1 ba · 692 ft²
$390K
20 Riverside St # 1-6
1 bd · 1 ba · 421 ft²
$326K
20 Riverside St # 1-7
2 bd · 1 ba · 809 ft²
$446K
20 Riverside St # 1-8
2 bd · 1 ba · 809 ft²
$428K
20 Riverside St # 2-1
2 bd · 1 ba · 809 ft²
$432K
20 Riverside St # 2-2
2 bd · 1 ba · 809 ft²
$430K
20 Riverside St # 2-3
1 ba · 421 ft²
$488K
20 Riverside St # 2-4
1 bd · 1 ba · 692 ft²
$403K
20 Riverside St # 2-5
1 bd · 1 ba · 692 ft²
$399K
20 Riverside St # 2-6
1 ba · 481 ft²
$369K
20 Riverside St # 2-7
2 bd · 1 ba · 809 ft²
$428K
20 Riverside St # 2-8
2 bd · 1 ba · 809 ft²
$438K
20 Riverside St # 3-1
2 bd · 1 ba · 809 ft²
$406K
20 Riverside St # 3-2
2 bd · 1 ba · 809 ft²
$428K
20 Riverside St # 3-3
1 ba · 421 ft²
$317K
20 Riverside St # 3-4
1 bd · 1 ba · 692 ft²
$404K
20 Riverside St # 3-5
1 bd · 1 ba · 692 ft²
$391K
20 Riverside St # 3-6
1 bd · 1 ba · 481 ft²
$342K
20 Riverside St # 3-7
2 bd · 1 ba · 809 ft²
$429K
20 Riverside St # 3-8
2 bd · 1 ba · 809 ft²
$441K

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

About 20 Riverside St

How many units are in 20 Riverside St, Watertown, MA?

20 Riverside St, Watertown, MA has 30 residential units across built in 1962, according to county assessor records.

What is a unit at 20 Riverside St, Watertown, MA worth?

The median TopHap Estimate across the 30 units at 20 Riverside St, Watertown, MA is $403,865. That works out to $564 per square foot. Units run from 421 to 809 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 20 Riverside St, Watertown, MA expensive for Watertown?

Units at 20 Riverside St, Watertown, MA carry a median of $564 per square foot, 9% above the Watertown median of $517 per square foot.

How often do units sell at 20 Riverside St, Watertown, MA?

0 units at 20 Riverside St, Watertown, MA sold in the last 12 months, out of 39 recorded arms-length sales all time. That is a turnover rate of 0.0% of the building per year.

Have units at 20 Riverside St, Watertown, MA appreciated?

Across 17 repeat sales of the same unit, 20 Riverside St, Watertown, MA returned a median 4.4% per year. Because each pair is the same unit bought and sold, the figure is not distorted by which units traded. The median owner held for 7.6 years.

What floor plans does 20 Riverside St, Watertown, MA have?

The most common plan at 20 Riverside St, Watertown, MA is a 2-bedroom of 809 square feet, repeated 13 times, with a median estimate of $430,355. TopHap identifies 4 recurring plans in the building.

More homes on Riverside St

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Assigned schools

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