10 Williams St #21 is a 670 square foot condo with 1 bedroom and 1 bathroom. Based on Redfin's Watertown data, we estimate the home's value is $348,977.
CondoProperty Type
1973Year Built
$521Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$348,977
$2,000 since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 15.9% lower than the average sale price ($415K) of 6 comparable homes.
As the MLS and public records start to fill up, we'll list the details here.
Year
Property tax
Land + Additions
Assessment*
2026
$4,534 (+3.7%)
$371,600
2025
$4,373 (+6.1%)
$374,400
2024
$4,121 (−12.5%)
$352,200
2023
$4,708 (+6.3%)
$346,700
2022
$4,431 (+9.0%)
$334,400
2021
$4,067 (+0.9%)
$332,000
2020
$4,030 (+10.0%)
$332,000
2019
$3,663 (+6.0%)
$284,400
2018
$3,455 (+4.8%)
$256,500
2017
$3,296 (+10.5%)
$237,300
2016
$2,984 (−7.4%)
$218,100
2015
$3,221 (+14.8%)
$214,300
2014
$2,805 (+1.9%)
$187,500
2013
$2,753 (+6.3%)
$187,500
2012
$2,589 (+1.3%)
$179,800
2011
$2,556 (+4.6%)
$183,600
2010
$2,444 (−2.6%)
$183,600
2009
$2,508
$204,900
Tax history for 10 Williams St #21
Year
Property tax
Land + Additions
Assessment*
2026
$4,534 (+3.7%)
$371,600
2025
$4,373 (+6.1%)
$374,400
2024
$4,121 (−12.5%)
$352,200
2023
$4,708 (+6.3%)
$346,700
2022
$4,431 (+9.0%)
$334,400
2021
$4,067 (+0.9%)
$332,000
2020
$4,030 (+10.0%)
$332,000
2019
$3,663 (+6.0%)
$284,400
2018
$3,455 (+4.8%)
$256,500
2017
$3,296 (+10.5%)
$237,300
2016
$2,984 (−7.4%)
$218,100
2015
$3,221 (+14.8%)
$214,300
2014
$2,805 (+1.9%)
$187,500
2013
$2,753 (+6.3%)
$187,500
2012
$2,589 (+1.3%)
$179,800
2011
$2,556 (+4.6%)
$183,600
2010
$2,444 (−2.6%)
$183,600
2009
$2,508
$204,900
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Property details
Interior
Bathroom Information
# of Full Baths: 1
Heating & Cooling
Heating Type: Forced Hot Water
Room Information
# of Rooms: 2
Exterior
Exterior Information
Physical Condition: Average
Construction Type: Frame
Exterior Wall: Brick
Roof Shape Type: Flat
Property Information
Living Sq. Ft: 670
Gross Sq. Ft: 730
# of Units: 1
# of Stories: 1
Lot Information
# of Buildings: 1
Land Sq. Ft: 40,448
Municipality Name: WATERTOWN
Acres: 0.9286
Zoning Code: R1.2
State Use Description: CONDOMINIUM
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 1
Baths: 1.0
Sq. Ft.: 670
Stories: 1.0
Lot Size: —
Style: Condo/Co-op
Year Built: 1973
Year Renovated: —
County: Middlesex County
APN: 1891672S
Home facts updated by county records on Sep 11, 2026
Around this home
Schools
Hosmer Elementary School
Public PreK-5 • Assigned • 1.0mi
7/10
Watertown Middle School
Public 6-8 • Assigned • 1.0mi
7/10
Watertown High School
Public 9-12 • Assigned • 0.9mi
6/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Local insights from Redfin agents
Watertown's urban-suburban feeling paired with its proximity to Cambridge & Boston have caused it to rapidly transform into a destination for home buyers. Historically a manufacturing city, it has changed into a restaurant, shopping, and biotech hub...
with a completely built-out residential landscape.
Watertown’s market has exploded in recent years, with high home prices. Located close to Boston, it offers the perfect balance of a seamless urban commute and the tranquility of suburban living. Enhanced by flexible MBTA bus options and its location...