20 Commonwealth Rd is a 2,470 square foot multi-family home on a 4,356 square foot lot with 4 bedrooms and 2 bathrooms. - it last sold on August 06, 1991 for $225,000. Based on Redfin's Watertown data, we estimate the home's value is $1,140,313.
Multi-familyProperty Type
1920Year Built
4,356 sq ftLot Size
$462Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,140,313
$915K since sold in August 1991$55K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 12.4% lower than the average sale price ($1.30M) 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: 1,235
Bathroom Information
# of Full Baths: 2
Heating & Cooling
Heating Type: Steam
Fireplace Information
# of Fireplaces: 2
Has Fireplace
Room Information
# of Rooms: 10
Exterior
Exterior Information
Physical Condition: Average
Building Style Type: Duplex
Construction Type: Frame
Exterior Wall: Wood Siding/Shingle
Roof Shape Type: Hip
Property Information
Living Sq. Ft: 2,470
Gross Sq. Ft: 5,384
# of Units: 2
# of Stories: 3
Lot Information
# of Buildings: 1
Land Sq. Ft: 4,356
Municipality Name: WATERTOWN
Acres: 0.1
Zoning Code: T
State Use Description: 2-FAMILY RESIDENCE
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 2.0
Sq. Ft.: 2,470
Stories: 3.0
Lot Size: 4,356 square feet
Style: Multi-Family (2-4 Unit)
Year Built: 1920
Year Renovated: —
County: Middlesex County
APN: 3568095S
Home facts updated by county records on Jul 29, 2026
Around this home
Schools
Hosmer Elementary School
Public PreK-5 • Assigned • 0.6mi
7/10
Watertown Middle School
Public 6-8 • Assigned • 1.3mi
7/10
Watertown High School
Public 9-12 • Assigned • 1.4mi
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.