20 Common St is a 2,642 square foot condo with 3 bedrooms and 3 bathrooms. - it last sold on August 26, 2008 for $940,000. Based on Redfin's Watertown data, we estimate the home's value is $1,475,234.
CondoProperty Type
2006Year Built
$558Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,475,234
$535K since sold in August 2008$9,000 since October
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 29.2% higher than the average sale price ($1.14M) of 6 comparable homes.
*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: Fair
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
Land Sq. Ft: 20,401
Municipality Name: WATERTOWN
Acres: 0.4683
Zoning Code: HIST
State Use Description: CONDOMINIUM
Financial
Assessor Information
Assessment Year: 2026
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: 2671010S
Home facts updated by county records on Sep 10, 2026
Around this home
Schools
K - 12
Preschool & daycare
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...