20 Common St is a 2,642 square foot condo with 3 bedrooms and 3 bathrooms. Based on Redfin's Watertown data, we estimate the home's value is $1,528,253.
CondoProperty Type
2006Year Built
$578Est. Price/Sq.Ft.
2 garage spacesParking
Source:Public Records
Redfin Estimate
$1,528,253
$4,000 since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 46.3% higher than the average sale price ($1.04M) 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*
2025
$15,366 (+8.4%)
$1,315,600
2024
$14,169 (−12.6%)
$1,211,000
2023
$16,206 (+12.8%)
$1,193,400
2022
$14,363 (+10.9%)
$1,084,000
2021
$12,956 (+0.9%)
$1,057,600
2020
$12,839 (−0.3%)
$1,057,600
2019
$12,875 (+10.8%)
$999,600
2018
$11,625
$863,000
2017
$11,623 (+4.5%)
$836,800
2016
$11,125 (−9.9%)
$813,200
2015
$12,349 (+5.6%)
$821,600
2014
$11,694 (+1.9%)
$781,700
2013
$11,475 (+1.9%)
$781,700
2012
$11,256 (+10.2%)
$781,700
2011
$10,212 (+4.6%)
$733,600
2010
$9,764 (−2.7%)
$733,600
2009
$10,034
$819,800
Tax history for 20 Common St
Year
Property tax
Land + Additions
Assessment*
2025
$15,366 (+8.4%)
$1,315,600
2024
$14,169 (−12.6%)
$1,211,000
2023
$16,206 (+12.8%)
$1,193,400
2022
$14,363 (+10.9%)
$1,084,000
2021
$12,956 (+0.9%)
$1,057,600
2020
$12,839 (−0.3%)
$1,057,600
2019
$12,875 (+10.8%)
$999,600
2018
$11,625
$863,000
2017
$11,623 (+4.5%)
$836,800
2016
$11,125 (−9.9%)
$813,200
2015
$12,349 (+5.6%)
$821,600
2014
$11,694 (+1.9%)
$781,700
2013
$11,475 (+1.9%)
$781,700
2012
$11,256 (+10.2%)
$781,700
2011
$10,212 (+4.6%)
$733,600
2010
$9,764 (−2.7%)
$733,600
2009
$10,034
$819,800
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Property details
Interior
Basement Information
Basement Sq. Ft: 963
Bathroom Information
# of Full Baths: 2
# of 1/2 Baths: 2
Heating & Cooling
Heating Type: Forced Air
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Room Information
# of Rooms: 8
Exterior
Exterior Information
Physical Condition: Good
Building Style Type: Townhouse
Construction Type: Frame
Exterior Wall: Wood Siding/Shingle
Roof Shape Type: Hip
Property Information
Living Sq. Ft: 2,642
Gross Sq. Ft: 4,137
# of Units: 1
# of Stories: 2
Lot Information
# of Buildings: 1
Municipality Name: WATERTOWN
Zoning Code: HIST
State Use Description: CONDOMINIUM
Financial
Assessor Information
Assessment Year: 2025
Public facts
Beds: 3
Baths: 3.0
Sq. Ft.: 2,642
Stories: 2.0
Lot Size: —
Style: Condo/Co-op
Year Built: 2006
Year Renovated: —
County: Middlesex County
APN: 4696790
Home facts updated by county records on Jul 16, 2026
Around this home
Schools
Hosmer Elementary School
Public PreK-5 • Assigned • 0.6mi
7/10
Watertown Middle School
Public 6-8 • Assigned • 0.7mi
7/10
Watertown High School
Public 9-12 • Assigned • 0.7mi
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...