139 Riverside St is a 1,643 square foot house on a 6,970 square foot lot with 2 bedrooms and 1.5 bathrooms. Based on Redfin's Watertown data, we estimate the home's value is $815,947.
Single-familyProperty Type
1921Year Built
6,970 sq ftLot Size
$497Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$815,947
$30K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 20.7% lower than the average sale price ($1.03M) 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
$9,895 (+63.3%)
$486,400 + $324,700
$811,100
2016
$6,059 (−5.8%)
$288,300 + $154,600
$442,900
2015
$6,434 (+0.5%)
$273,500 + $154,600
$428,100
2014
$6,404
$273,500 + $154,600
$428,100
Tax history for 139 Riverside St
Year
Property tax
Land + Additions
Assessment*
2026
$9,895 (+63.3%)
$486,400 + $324,700
$811,100
2016
$6,059 (−5.8%)
$288,300 + $154,600
$442,900
2015
$6,434 (+0.5%)
$273,500 + $154,600
$428,100
2014
$6,404
$273,500 + $154,600
$428,100
*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: 890
Bathroom Information
# of Full Baths: 1
# of 1/2 Baths: 1
Heating & Cooling
Heating Type: Forced Air
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Room Information
# of Rooms: 5
Exterior
Exterior Information
Physical Condition: Average
Building Style Type: Cape Cod
Construction Type: Frame
Exterior Wall: Shingle
Roof Shape Type: Gable
Property Information
Living Sq. Ft: 1,643
Gross Sq. Ft: 2,750
# of Units: 1
# of Stories: 2
Lot Information
# of Buildings: 1
Land Sq. Ft: 6,970
Municipality Name: WATERTOWN
Acres: 0.16
Zoning Code: T
State Use Description: 1-FAMILY RESIDENCE
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 2
Baths: 1.5
Sq. Ft.: 1,643
Stories: 2.0
Lot Size: 6,970 square feet
Style: Single Family Residential
Year Built: 1921
Year Renovated: —
County: Middlesex County
APN: 421498S
Home facts updated by county records on Jul 29, 2026
Around this home
Schools
Places
Transit
Hosmer Elementary School
Public PreK-5 • Assigned • 0.7mi
7/10
Watertown Middle School
Public 6-8 • Assigned • 1.0mi
7/10
Watertown High School
Public 9-12 • Assigned • 1.0mi
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.