23 Derby Rd #21 is a 2,316 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 $1,197,189.
Multi-familyProperty Type
1927Year Built
5,227 sq ftLot Size
$517Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,197,189
$15K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 9.5% higher than the average sale price ($1.09M) 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
$13,292 (+7.1%)
$523,500 + $566,000
$1,089,500
2025
$12,408 (+12.5%)
$523,500 + $538,800
$1,062,300
2024
$11,032 (−11.3%)
$509,700 + $433,200
$942,900
2023
$12,439 (+7.6%)
$487,500 + $428,500
$916,000
2022
$11,563 (+11.8%)
$443,200 + $429,500
$872,700
2021
$10,338 (+3.7%)
$428,400 + $415,500
$843,900
2020
$9,967 (+4.0%)
$413,700 + $407,300
$821,000
2019
$9,583 (+3.9%)
$413,700 + $330,300
$744,000
2018
$9,223 (+4.3%)
$384,100 + $300,600
$684,700
2017
$8,844 (+4.6%)
$336,100 + $300,600
$636,700
2016
$8,457 (+10.6%)
$317,600 + $300,600
$618,200
2015
$7,644 (+4.3%)
$280,700 + $227,900
$508,600
2014
$7,332 (+1.9%)
$262,200 + $227,900
$490,100
2013
$7,195 (+5.1%)
$262,200 + $227,900
$490,100
2012
$6,846 (+1.3%)
$247,500 + $227,900
$475,400
2011
$6,760 (+1.9%)
$241,900 + $243,700
$485,600
2010
$6,635 (+0.7%)
$254,800 + $243,700
$498,500
2009
$6,592
$278,600 + $260,000
$538,600
Tax history for 23 Derby Rd #21
Year
Property tax
Land + Additions
Assessment*
2026
$13,292 (+7.1%)
$523,500 + $566,000
$1,089,500
2025
$12,408 (+12.5%)
$523,500 + $538,800
$1,062,300
2024
$11,032 (−11.3%)
$509,700 + $433,200
$942,900
2023
$12,439 (+7.6%)
$487,500 + $428,500
$916,000
2022
$11,563 (+11.8%)
$443,200 + $429,500
$872,700
2021
$10,338 (+3.7%)
$428,400 + $415,500
$843,900
2020
$9,967 (+4.0%)
$413,700 + $407,300
$821,000
2019
$9,583 (+3.9%)
$413,700 + $330,300
$744,000
2018
$9,223 (+4.3%)
$384,100 + $300,600
$684,700
2017
$8,844 (+4.6%)
$336,100 + $300,600
$636,700
2016
$8,457 (+10.6%)
$317,600 + $300,600
$618,200
2015
$7,644 (+4.3%)
$280,700 + $227,900
$508,600
2014
$7,332 (+1.9%)
$262,200 + $227,900
$490,100
2013
$7,195 (+5.1%)
$262,200 + $227,900
$490,100
2012
$6,846 (+1.3%)
$247,500 + $227,900
$475,400
2011
$6,760 (+1.9%)
$241,900 + $243,700
$485,600
2010
$6,635 (+0.7%)
$254,800 + $243,700
$498,500
2009
$6,592
$278,600 + $260,000
$538,600
*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: 1,118
Bathroom Information
# of Full Baths: 2
Heating & Cooling
Heating Type: Steam
Room Information
# of Rooms: 10
Exterior
Exterior Information
Physical Condition: Average
Building Style Type: Duplex
Construction Type: Frame
Exterior Wall: Vinyl
Roof Shape Type: Gable
Property Information
Living Sq. Ft: 2,316
Gross Sq. Ft: 5,116
# of Units: 2
# of Stories: 3
Lot Information
# of Buildings: 1
Land Sq. Ft: 5,227
Municipality Name: WATERTOWN
Acres: 0.12
Zoning Code: T
State Use Description: 2-FAMILY RESIDENCE
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 2.0
Sq. Ft.: 2,316
Stories: 3.0
Lot Size: 5,227 square feet
Style: Multi-Family (2-4 Unit)
Year Built: 1927
Year Renovated: —
County: Middlesex County
APN: 3519401S
Home facts updated by county records on Jul 29, 2026
Around this home
Schools
Hosmer Elementary School
Public PreK-5 • Assigned • 1.3mi
7/10
Watertown Middle School
Public 6-8 • Assigned • 0.8mi
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.