21 Middlesex Rd is a 3,240 square foot multi-family home on a 5,227 square foot lot with 4 bedrooms and 2 bathrooms. Based on Redfin's Watertown data, we estimate the home's value is $1,177,838.
Multi-familyProperty Type
1930Year Built
5,227 sq ftLot Size
$364Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,177,838
$4,000 since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 4.9% higher than the average sale price ($1.12M) 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
$13,854 (+8.7%)
$521,000 + $614,600
$1,135,600
2025
$12,744 (+9.8%)
$521,000 + $570,100
$1,091,100
2024
$11,611 (−10.6%)
$507,100 + $485,300
$992,400
2023
$12,981 (+10.7%)
$485,000 + $470,900
$955,900
2022
$11,722 (+10.0%)
$440,900 + $443,800
$884,700
2021
$10,658 (+3.2%)
$426,200 + $443,800
$870,000
2020
$10,331 (+13.2%)
$411,500 + $439,500
$851,000
2019
$9,129 (+2.8%)
$411,500 + $297,300
$708,800
2018
$8,878 (+4.5%)
$382,100 + $277,000
$659,100
2017
$8,492 (+4.7%)
$334,400 + $277,000
$611,400
2016
$8,112 (−3.0%)
$316,000 + $277,000
$593,000
2015
$8,361 (+3.9%)
$279,300 + $277,000
$556,300
2014
$8,047 (+1.9%)
$260,900 + $277,000
$537,900
2013
$7,896 (+4.8%)
$260,900 + $277,000
$537,900
2012
$7,534 (+0.6%)
$246,200 + $277,000
$523,200
2011
$7,488 (+2.9%)
$240,700 + $297,200
$537,900
2010
$7,278
$253,500 + $293,300
$546,800
2009
$7,285
$277,200 + $318,000
$595,200
Tax history for 21 Middlesex Rd
Year
Property tax
Land + Additions
Assessment*
2026
$13,854 (+8.7%)
$521,000 + $614,600
$1,135,600
2025
$12,744 (+9.8%)
$521,000 + $570,100
$1,091,100
2024
$11,611 (−10.6%)
$507,100 + $485,300
$992,400
2023
$12,981 (+10.7%)
$485,000 + $470,900
$955,900
2022
$11,722 (+10.0%)
$440,900 + $443,800
$884,700
2021
$10,658 (+3.2%)
$426,200 + $443,800
$870,000
2020
$10,331 (+13.2%)
$411,500 + $439,500
$851,000
2019
$9,129 (+2.8%)
$411,500 + $297,300
$708,800
2018
$8,878 (+4.5%)
$382,100 + $277,000
$659,100
2017
$8,492 (+4.7%)
$334,400 + $277,000
$611,400
2016
$8,112 (−3.0%)
$316,000 + $277,000
$593,000
2015
$8,361 (+3.9%)
$279,300 + $277,000
$556,300
2014
$8,047 (+1.9%)
$260,900 + $277,000
$537,900
2013
$7,896 (+4.8%)
$260,900 + $277,000
$537,900
2012
$7,534 (+0.6%)
$246,200 + $277,000
$523,200
2011
$7,488 (+2.9%)
$240,700 + $297,200
$537,900
2010
$7,278
$253,500 + $293,300
$546,800
2009
$7,285
$277,200 + $318,000
$595,200
*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: 1,440
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: Multi-Family
Construction Type: Frame
Exterior Wall: Aluminum Siding
Roof Shape Type: Gable
Property Information
Living Sq. Ft: 3,240
Gross Sq. Ft: 6,253
# of Units: 2
# of Stories: 3
Parking & Garage Information
Parking Type: Basement Garage
Garage / Carport Type: Basement
Lot Information
# of Buildings: 1
Land Sq. Ft: 5,227
Municipality Name: WATERTOWN
Acres: 0.12
Zoning Code: SC
State Use Description: 2-FAMILY RESIDENCE
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 2.0
Sq. Ft.: 3,240
Stories: 3.0
Lot Size: 5,227 square feet
Style: Multi-Family (2-4 Unit)
Year Built: 1930
Year Renovated: —
County: Middlesex County
APN: 600031S
Home facts updated by county records on Jul 29, 2026
Around this home
Schools
Places
Transit
J.R. Lowell Elementary School
Public PreK-5 • Assigned • 0.5mi
8/10
Watertown Middle School
Public 6-8 • Assigned • 0.6mi
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.