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CondominiumResidential
Last sold for $410,000 on Sep 14, 2022

10 WILLIAMS ST

WATERTOWN, MA 02472
0.93 ac
Lot SizeThe size of the land the home sits on, from county records.
1973
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
Built 197373 units670–1,100 ft²
$30M
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.
$426K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$462
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

-10.3%vs the Watertown ZIP median sale $/ft² ($515)

Sales Performance

$420K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
+7.6%
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
4
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
5.5%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+3.7%per yeartypical hold 8.5 yrsfrom 59 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
19871992199820032008201320212026
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
19871992199820032008201320212026

124 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.
$238K$345K$451K$558K670 ft²756 ft²842 ft²928 ft²1,014 ft²1,100 ft²
1 bd2 bd
1 bed
30 units
2 bed
43 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 · 950 ft²
27 units
1 bd · 1 ba · 670 ft²
22 units
2 bd · 2 ba · 1,080 ft²
15 units
1 bd · 1 ba · 735 ft²
7 units
One-off layouts
2 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.

$238K–$238K
1 unit
$325K–$351K
4 units
$359K–$397K
22 units
$402K–$433K
17 units
$439K–$472K
20 units
$483K–$505K
5 units
$544K–$558K
2 units

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.60%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.19%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.10.8 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.47%
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.32%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$415,220
Median tax billThe middle annual property tax bill among the building's units.$5,124
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 34Jul 22, 2026$430,000Unit 37Jul 20, 2026$362,000Unit 39Jan 29, 2026$409,000Unit 56Dec 31, 2025$461,800Unit 82Aug 29, 2025$250,000Unit 79Jul 3, 2025$450,000Unit 77Jun 12, 2025$390,000Unit 83Sep 24, 2024$590,000Unit 78Sep 13, 2024$395,200Unit 44Jun 3, 2024$527,000

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

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,297 (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.$352,200 (2026)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$352,200
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$355,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$474,335

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 · 0.8 mi
M
Watertown Middle SchoolB-
Middle · Grades 6–8 · 1.0 mi
E
Hosmer Elementary SchoolB
Elementary · Grades PK–5 · 1.0 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.

10 Williams St
2 bd · 1 ba · 950 ft²
$402K
10 Williams St # 11
1 bd · 1 ba · 670 ft²
$340K
10 Williams St # 13
2 bd · 2 ba · 1,080 ft²
$472K
10 Williams St # 20
2 bd · 1 ba · 950 ft²
$421K
10 Williams St # 21
1 bd · 1 ba · 670 ft²
$389K
10 Williams St # 22
1 bd · 1 ba · 735 ft²
$351K
10 Williams St # 23
2 bd · 2 ba · 1,080 ft²
$494K
10 Williams St # 24
2 bd · 1 ba · 950 ft²
$431K
10 Williams St # 25
2 bd · 1 ba · 950 ft²
$432K
10 Williams St # 26
2 bd · 2 ba · 1,080 ft²
$450K
10 Williams St # 27
1 bd · 1 ba · 670 ft²
$365K
10 Williams St # 28
1 bd · 1 ba · 670 ft²
$372K
10 Williams St # 29
2 bd · 1 ba · 950 ft²
$409K
10 Williams St # 30
2 bd · 1 ba · 950 ft²
$439K
10 Williams St # 31
1 bd · 1 ba · 670 ft²
$346K
10 Williams St # 32
1 bd · 1 ba · 735 ft²
$402K
10 Williams St # 33
2 bd · 2 ba · 1,080 ft²
$485K
10 Williams St # 34
2 bd · 1 ba · 950 ft²
$426K
10 Williams St # 35
2 bd · 1 ba · 950 ft²
$407K
10 Williams St # 36
2 bd · 2 ba · 1,080 ft²
$468K
10 Williams St # 37
1 bd · 1 ba · 670 ft²
$359K
10 Williams St # 38
1 bd · 1 ba · 670 ft²
$373K
10 Williams St # 39
2 bd · 1 ba · 950 ft²
$397K
10 Williams St # 40
2 bd · 1 ba · 950 ft²
$439K
10 Williams St # 41
1 bd · 1 ba · 670 ft²
10 Williams St # 42
1 bd · 1 ba · 735 ft²
$378K
10 Williams St # 43
2 bd · 2 ba · 1,080 ft²
$468K
10 Williams St # 44
2 bd · 1 ba · 950 ft²
$463K
10 Williams St # 45
2 bd · 1 ba · 950 ft²
$408K
10 Williams St # 46
2 bd · 2 ba · 1,080 ft²
$470K
10 Williams St # 47
1 bd · 1 ba · 670 ft²
$375K
10 Williams St # 48
1 bd · 1 ba · 670 ft²
$383K
10 Williams St # 49
1 bd · 1 ba · 950 ft²
$443K
10 Williams St # 50
2 bd · 1 ba · 950 ft²
$440K
10 Williams St # 51
1 bd · 1 ba · 670 ft²
$372K
10 Williams St # 52
1 bd · 1 ba · 735 ft²
$361K
10 Williams St # 53
2 bd · 2 ba · 1,080 ft²
$505K
10 Williams St # 54
2 bd · 1 ba · 950 ft²
$439K
10 Williams St # 55
2 bd · 1 ba · 950 ft²
$418K
10 Williams St # 56
2 bd · 2 ba · 1,080 ft²
$446K
10 Williams St # 57
1 bd · 1 ba · 670 ft²
$381K
10 Williams St # 58
1 bd · 1 ba · 670 ft²
$375K
10 Williams St # 59
2 bd · 1 ba · 950 ft²
$447K
10 Williams St # 60
2 bd · 1 ba · 950 ft²
$433K
10 Williams St # 61
1 bd · 1 ba · 670 ft²
$372K
10 Williams St # 62
1 bd · 1 ba · 735 ft²
10 Williams St # 63
2 bd · 2 ba · 1,080 ft²
$472K
10 Williams St # 64
2 bd · 1 ba · 950 ft²
$439K
10 Williams St # 65
2 bd · 1 ba · 950 ft²
$439K
10 Williams St # 66
2 bd · 2 ba · 1,080 ft²
$463K
10 Williams St # 67
1 bd · 1 ba · 670 ft²
$371K
10 Williams St # 68
1 bd · 1 ba · 670 ft²
$389K
10 Williams St # 69
2 bd · 1 ba · 950 ft²
$411K
10 Williams St # 70
2 bd · 1 ba · 950 ft²
$455K
10 Williams St # 71
1 bd · 1 ba · 670 ft²
$386K
10 Williams St # 72
1 bd · 1 ba · 735 ft²
$363K
10 Williams St # 73
2 bd · 2 ba · 1,080 ft²
$471K
10 Williams St # 74
2 bd · 1 ba · 950 ft²
$429K
10 Williams St # 75
2 bd · 1 ba · 950 ft²
$428K
10 Williams St # 76
2 bd · 2 ba · 1,080 ft²
$483K
10 Williams St # 77
1 bd · 1 ba · 670 ft²
$370K
10 Williams St # 78
1 bd · 1 ba · 670 ft²
$369K
10 Williams St # 79
2 bd · 1 ba · 950 ft²
$428K
10 Williams St # 80
2 bd · 1 ba · 950 ft²
$439K
10 Williams St # 81
1 bd · 1 ba · 670 ft²
$370K
10 Williams St # 82
1 bd · 1 ba · 735 ft²
$238K
10 Williams St # 83
2 bd · 2 ba · 1,080 ft²
$544K
10 Williams St # 84
2 bd · 1 ba · 950 ft²
$431K
10 Williams St # 85
2 bd · 1 ba · 950 ft²
$426K
10 Williams St # 86
2 bd · 2 ba · 1,080 ft²
$494K
10 Williams St # 87
1 bd · 1 ba · 670 ft²
$325K
10 Williams St # 88
1 bd · 1 ba · 670 ft²
$387K
10 Williams St # 89
2 bd · 1 ba · 950 ft²
$412K
10 Williams St # 137
2 bd · 2 ba · 1,100 ft²
$558K

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

About 10 Williams St

How many units are in 10 Williams St, Watertown, MA?

10 Williams St, Watertown, MA has 73 residential units across built in 1973, according to county assessor records.

What is a unit at 10 Williams St, Watertown, MA worth?

The median TopHap Estimate across the 73 units at 10 Williams St, Watertown, MA is $425,871. That works out to $462 per square foot. Units run from 670 to 1,100 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 10 Williams St, Watertown, MA expensive for Watertown?

Units at 10 Williams St, Watertown, MA carry a median of $462 per square foot, 10% below the Watertown median of $515 per square foot.

How often do units sell at 10 Williams St, Watertown, MA?

4 units at 10 Williams St, Watertown, MA sold in the last 12 months, out of 124 recorded arms-length sales all time. That is a turnover rate of 5.5% of the building per year. The median sale over that period was $420K.

Have units at 10 Williams St, Watertown, MA appreciated?

Across 59 repeat sales of the same unit, 10 Williams St, Watertown, MA returned a median 3.7% 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 8.5 years.

What floor plans does 10 Williams St, Watertown, MA have?

The most common plan at 10 Williams St, Watertown, MA is a 2-bedroom of 950 square feet, repeated 27 times, with a median estimate of $431,000. TopHap identifies 4 recurring plans in the building.

More homes on Williams St

Closest homes

More homes in Watertown 02472

Assigned schools

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