Google street view image for 21 Knowles Rd, Watertown, MA 02472

OFF MARKET

—

•

1 ba

•

1,900

sq ft

21 Knowles Rd, Watertown, MA 02472

About this home

21 Knowles Rd is a 1,900 square foot condo with 2 bedrooms and 1 bathroom.

CondoProperty Type

1915Year Built

Source:Public Records

Redfin Estimate

We are currently not able to show the Redfin Estimate at this time.

Nearby homes have recently sold between $555,000 and $712,000.

Market trends in 02472, MA

Last updated July 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

100.6%

+0.1% MoM

Median sale price

$850K

$5K MoM

Avg. days on market

19d

0 days MoM

Recently sold homes

102

6 MoM

New listings for sale

$545,000
2 beds1.5 baths1,311 sq ft
956 Belmont #956, Washington, DC 20472
$869,900
3 beds1.5 baths1,873 sq ft
97 Melendy Ave #97, Watertown, MA 02472
$650,000
2 beds1.5 baths1,683 sq ft
9 Circuit Ln #9, Watertown, MA 02472
3D WALKTHROUGH
$525,000
2 beds1 bath1,231 sq ft
84 Duff St #84, Watertown, MA 02472
$599,000
2 beds2 baths1,270 sq ft
131 Coolidge Ave #526, Watertown, MA 02472
$1,499,000
5 beds2 baths2,416 sq ft
27 Woodleigh Rd, Watertown, MA 02472
$1,099,000
5 beds3 baths2,300 sq ft
7 Hearn, Watertown, MA 02472
3D WALKTHROUGH
$695,000
3 beds1 bath1,186 sq ft
52 Ralph St #52, Watertown, MA 02472
See all

Provided by Redfin

Sale history for 21 Knowles Rd

As the MLS and public records start to fill up, we'll list the details here.

Year

Property tax

Land + Additions

Assessment*

2025

$8,017 (+5.3%)

$686,400

2024

$7,611 (−10.5%)

$650,500

2023

$8,508 (+12.8%)

$626,500

2022

$7,545 (+11.7%)

$569,400

2021

$6,756 (+0.9%)

$551,500

2020

$6,695 (+5.6%)

$551,500

2019

$6,340 (+3.8%)

$492,200

2018

$6,109 (+1.1%)

$453,500

2017

$6,045 (+8.8%)

$435,200

2016

$5,554 (−4.7%)

$406,000

2015

$5,827 (+4.4%)

$387,700

2014

$5,582 (+1.9%)

$373,100

2013

$5,477 (+1.9%)

$373,100

2012

$5,373 (+7.5%)

$373,100

2011

$4,996 (+4.6%)

$358,900

2010

$4,777 (+5.4%)

$358,900

2009

$4,531

$370,200

Tax history for 21 Knowles Rd

Year

Property tax

Land + Additions

Assessment*

2025

$8,017 (+5.3%)

$686,400

2024

$7,611 (−10.5%)

$650,500

2023

$8,508 (+12.8%)

$626,500

2022

$7,545 (+11.7%)

$569,400

2021

$6,756 (+0.9%)

$551,500

2020

$6,695 (+5.6%)

$551,500

2019

$6,340 (+3.8%)

$492,200

2018

$6,109 (+1.1%)

$453,500

2017

$6,045 (+8.8%)

$435,200

2016

$5,554 (−4.7%)

$406,000

2015

$5,827 (+4.4%)

$387,700

2014

$5,582 (+1.9%)

$373,100

2013

$5,477 (+1.9%)

$373,100

2012

$5,373 (+7.5%)

$373,100

2011

$4,996 (+4.6%)

$358,900

2010

$4,777 (+5.4%)

$358,900

2009

$4,531

$370,200

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Property details

Interior

Bathroom Information
# of Full Baths: 1

Heating & Cooling
Heating Type: Forced Hot Water

Fireplace Information
# of Fireplaces: 1
Has Fireplace

Room Information
# of Rooms: 6

Exterior

Exterior Information
Physical Condition: Average
Construction Type: Frame
Exterior Wall: Vinyl
Roof Shape Type: Hip

Property Information
Living Sq. Ft: 1,900
Gross Sq. Ft: 2,608
# of Units: 1
# of Stories: 2

Lot Information
# of Buildings: 1
Municipality Name: WATERTOWN
Zoning Code: T
State Use Description: CONDOMINIUM

Financial

Assessor Information
Assessment Year: 2025

Public facts

Beds: 2
Baths: 1.0
Sq. Ft.: 1,900
Stories: 2.0
Lot Size: —
Style: Condo/Co-op
Year Built: 1915
Year Renovated: —
County: Middlesex County
APN: 4734169

Home facts updated by county records on Jul 16, 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...
2 months ago • Watertown
Benjamin Ginsburg
Redfin Premier agent
151 deals
Was this helpful?

Historical weather

Watertown, MA • 02472

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

In this area, properties receive around 9 hours in June and 4.4 hours in December, placing it below the U.S. average for solar exposure.

9 hrs

4.4 hrs

JuneDecember

Provided by Shadowmap

Work with an experienced agent and save on fees. 3 minutes to get started.

Need the cash from your home fast? Sell to .

Nearby similar homes

$1,399,000

3 beds2.5 baths1,758 sq ft

19 Drew Rd #19, Belmont, MA 02478

$399,000

2 beds1 bath950 sq ft

164 Galen St #14, Watertown, MA 02472

$499,000

2 beds1 bath748 sq ft

125 Trapelo Rd #12, Belmont, MA 02478

3D WALKTHROUGH

$1,295,000

4 beds4 baths2,200 sq ft

220 Sycamore St #2, Watertown, MA 02472

$525,000

2 beds1 bath738 sq ft

125 Trapelo #11, Belmont, MA 02478

$1,200,000

3 beds3 baths2,617 sq ft

130 Mount Auburn St #130, Watertown, MA 02472

New listings for sale in 20472

$545,000

2 beds1.5 baths1,311 sq ft

956 Belmont #956, Washington, DC 20472

$869,900

3 beds1.5 baths1,873 sq ft

97 Melendy Ave #97, Watertown, MA 02472

$650,000

2 beds1.5 baths1,683 sq ft

9 Circuit Ln #9, Watertown, MA 02472

3D WALKTHROUGH

$525,000

2 beds1 bath1,231 sq ft

84 Duff St #84, Watertown, MA 02472

$599,000

2 beds2 baths1,270 sq ft

131 Coolidge Ave #526, Watertown, MA 02472

$1,499,000

5 beds2 baths2,416 sq ft

27 Woodleigh Rd, Watertown, MA 02472

$1,099,000

5 beds3 baths2,300 sq ft

7 Hearn, Watertown, MA 02472

3D WALKTHROUGH

$695,000

3 beds1 bath1,186 sq ft

52 Ralph St #52, Watertown, MA 02472

Home values near 21 Knowles Rd

Data from public records.

Address	Redfin Estimate
15 Knowles Road, Watertown, MA 4 Beds \| 1 Baths \| 2437 Sq. Ft.	$1,116,494
28 Knowles Road, Watertown, MA 2 Beds \| 1 Baths \| 1139 Sq. Ft.	$593,443

Address	Redfin Estimate
25 Knowles Road, Watertown, MA 3 Beds \| 2 Baths \| 1467 Sq. Ft.	$913,528
36 Knowles Road, Watertown, MA 2 Beds \| 1 Baths \| 1180 Sq. Ft.	$905,782

Address	Redfin Estimate
26 Knowles Road, Watertown, MA 2 Beds \| 1 Baths \| 1139 Sq. Ft.	$574,100
38 Knowles Road, Watertown, MA 3 Beds \| 2.5 Baths \| 1735 Sq. Ft.	$1,006,252

More real estate resources

Zip Codes
Minor Civil Divisions
Cities
Neighborhoods
Popular Searches

02138 homes for sale
02478 homes for sale
02458 homes for sale
02135 homes for sale
02472 homes for sale

Download the Redfin App on the Apple App Store

Download the Redfin App from the Google Play Store

Join us

Become an Agent

Get referrals

Careers

Find homes faster

About us

Find us

Subsidiaries

Affiliated Business

Countries

United States

Canada

Updated September 2025: By searching, you agree to the Terms of Use, and Privacy Policy.

Do not sell or share my personal information.

REDFIN and all REDFIN variants, WALK SCORE, and the R logos, are trademarks of Redfin Corporation, registered or pending in the USPTO.

California DRE #01521930

Redfin is licensed to do business in New York as Redfin Real Estate. NY Standard Operating Procedures

New Mexico Real Estate Licenses

TREC: Info About Brokerage Services, Consumer Protection Notice

All mortgage lending products and information are provided by Rocket Mortgage, LLC | NMLS #3030; www.NMLSConsumerAccess.org. Licensed in 50 states. This site is not authorized by the New York State Department of Financial Services for mortgage solicitation or loan applications activities related to properties located in the State of New York.

Redfin Corporation is an affiliated business of Rocket Limited Partnership. Each company, and their subsidiaries, are separate legal entities operated and managed through its own management and governance structures.

If you are using a screen reader, or having trouble reading this website, please call Redfin Customer Support for help at 1-844-759-7732.

REDFIN IS COMMITTED TO AND ABIDES BY THE FAIR HOUSING ACT AND EQUAL OPPORTUNITY ACT. READ REDFIN'S FAIR HOUSING POLICY AND THE NEW YORK STATE FAIR HOUSING NOTICE.

GreatSchools Ratings provided by GreatSchools.org.

Houses for rent in Watertown Town	Agents near me	Quincy, MA homes for sale	Watertown Town Housing Market
Houses for sale near me	Boston, MA homes for sale	Brookline, MA homes for sale
Land for sale near me	Newton, MA homes for sale	Arlington, MA homes for sale
Open Houses near me	Cambridge, MA homes for sale	Watertown Town Property Records
Condos for sale near me	Lexington, MA homes for sale	MA New Listings

Boston homes for sale
Newton homes for sale
Watertown homes for sale