Google street view image for 23 Union St, Watertown, MA 02472

Off market

$599,695

•

1 ba

•

1,122

sq ft

23 Union St, Watertown, MA 02472

About this home

23 Union St is a 1,122 square foot condo with 2 bedrooms and 1 bathroom. Based on Redfin's Watertown data, we estimate the home's value is $599,695.

CondoProperty Type

1927Year Built

$534Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$599,695

$4,000 since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 16.8% higher than the average sale price ($513K) of 6 comparable homes.

SOLD AUG 6, 2026
$555,000
A
2 beds1 bath1,052 sq ft
107 Lexington St #1, Watertown, MA 02472
SOLD AUG 18, 2026
$505,000
B
2 beds1 bath738 sq ft
68 Aldrich Rd Unit B, Watertown, MA 02472
SOLD JUN 29, 2026
$650,000
C
2 beds1 bath1,093 sq ft
16 Charles St Unit A, Watertown, MA 02472
SOLD FEB 26, 2026
$570,000
D
2 beds1 bath992 sq ft
64 California St #64, Watertown, MA 02472
SOLD AUG 12, 2026
$390,000
E
2 beds1 bath950 sq ft
164 Galen St #74, Watertown, MA 02472
SOLD AUG 24, 2026
$410,000
F
2 beds1 bath950 sq ft
10 Williams St #45, Watertown, MA 02472

Claim this home to receive a free report every month with insights on the changing estimate.

Earn from this home

Sell

$568,974

Est. take-home

List your home with Redfin and save $2,998

Rent

$2,920/mo

Redfin rental estimate

List your home for rent

Market trends in 02472, MA

Last updated September 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

100.4%

+0.7% MoM

Median sale price

$880K

$5K MoM

Avg. days on market

22d

0 days MoM

Recently sold homes

14 MoM

New listings for sale

OPEN SUN, 1PM TO 2:30PM
$397,000
2 beds1 bath600 sq ft
50 Carey Ave #9, Watertown, MA 02472
$575,000
1 bed1 bath840 sq ft
151 Coolidge Ave #608, Watertown, MA 02472
$1,595,000
4 beds4.5 baths3,284 sq ft
200 Belmont St Unit U01, Watertown, MA 02472
OPEN SUN, 12PM TO 1:30PM
$774,900
3 beds1 bath2,224 sq ft
54 Jensen Rd, Watertown, MA 02472
OPEN SUN, 2:30PM TO 4:30PM
$899,000
3 beds2.5 baths1,344 sq ft
559 Main St, Watertown, MA 02472
OPEN SUN, 12PM TO 2PM
$539,000
2 beds1 bath896 sq ft
90 Cypress St #2, Watertown, MA 02472
$850,000
6 beds2.5 baths3,078 sq ft
40-42 Irving St, Watertown, MA 02472
OPEN SUN, 11:30AM TO 1PM
$1,295,000
3 beds3 baths2,331 sq ft
25 Beechwood Ave #2, Watertown, MA 02472
OPEN SUN, 11:30AM TO 1PM
$1,195,000
3 beds3 baths2,034 sq ft
194 N Beacon St #1, Watertown, MA 02472
OPEN SUN, 12PM TO 1:30PM
$565,000
1 bed1 bath782 sq ft
4 Repton Cir #4209, Watertown, MA 02472
See all

Provided by Redfin

Sale history for 23 Union St

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

Year

Property tax

Land + Additions

Assessment*

2025

$6,007 (+1.6%)

$514,300

2024

$5,911 (−10.5%)

$505,200

2023

$6,604 (+13.9%)

$486,300

2022

$5,798 (+11.7%)

$437,600

2021

$5,193 (+0.9%)

$423,900

2020

$5,146 (+5.5%)

$423,900

2019

$4,880 (+4.1%)

$378,900

2018

$4,689 (+1.1%)

$348,100

2017

$4,639 (+8.9%)

$334,000

2016

$4,261 (−4.7%)

$311,500

2015

$4,471 (+4.4%)

$297,500

2014

$4,282 (+1.9%)

$286,200

2013

$4,201 (+4.4%)

$286,200

2012

$4,025 (+3.4%)

$279,500

2011

$3,891 (+4.6%)

$279,500

2010

$3,720 (+5.4%)

$279,500

2009

$3,531

$288,500

Tax history for 23 Union St

Year

Property tax

Land + Additions

Assessment*

2025

$6,007 (+1.6%)

$514,300

2024

$5,911 (−10.5%)

$505,200

2023

$6,604 (+13.9%)

$486,300

2022

$5,798 (+11.7%)

$437,600

2021

$5,193 (+0.9%)

$423,900

2020

$5,146 (+5.5%)

$423,900

2019

$4,880 (+4.1%)

$378,900

2018

$4,689 (+1.1%)

$348,100

2017

$4,639 (+8.9%)

$334,000

2016

$4,261 (−4.7%)

$311,500

2015

$4,471 (+4.4%)

$297,500

2014

$4,282 (+1.9%)

$286,200

2013

$4,201 (+4.4%)

$286,200

2012

$4,025 (+3.4%)

$279,500

2011

$3,891 (+4.6%)

$279,500

2010

$3,720 (+5.4%)

$279,500

2009

$3,531

$288,500

*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: 371

Bathroom Information
# of Full Baths: 1

Heating & Cooling
Heating Type: Steam

Room Information
# of Rooms: 6

Exterior

Exterior Information
Physical Condition: Average
Construction Type: Frame
Exterior Wall: Wood Siding/Shingle
Roof Shape Type: Hip

Property Information
Subdivision Name: 23-25 UNION STREET CONDO
Living Sq. Ft: 1,122
Gross Sq. Ft: 1,662
# 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.: 1,122
Stories: 2.0
Lot Size: —
Style: Condo/Co-op
Year Built: 1927
Year Renovated: —
County: Middlesex County
APN: 4684476

Home facts updated by county records on Jul 16, 2026

Around this home

Schools

Hosmer Elementary School

Public PreK-5 • Assigned • 1.1mi

7/10

Watertown Middle School

Public 6-8 • Assigned • 0.7mi

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...
1 month ago • Watertown
Benjamin Ginsburg
Redfin Premier agent
155 deals
Was this helpful?
Watertown’s market has exploded in recent years, with high home prices. Located close to Boston, it offers the perfect balance of a seamless urban commute and the tranquility of suburban living. Enhanced by flexible MBTA bus options and its location...
1 month ago • Watertown
Kyle MacNichol
Redfin Premier agent
59 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

Estimated sale price

$570,000 – $690,000

Reach more buyers when you sell with Redfin. Save up to $5,997 in fees. 3 minutes to get started.

Need the cash from your home fast? Sell to .

Nearby similar homes

OPEN SUN, 12PM TO 2PMVIDEO TOUR

$539,000

2 beds1 bath896 sq ft

90 Cypress St #2, Watertown, MA 02472

Top-floor living • Renovated kitchen • Induction cooking

OPEN SUN, 12PM TO 1:30PM

$930,000

2 beds1 bath903 sq ft

386 Watertown St #2, Newton, MA 02458

Deeded parking • Ev charging station • Welcoming lobby

$735,000

4 beds1 bath1,125 sq ft

29-31 Jackson Ter #29, Newton, MA 02458

First floor condo • Galley kitchen • Patio and garden

3D WALKTHROUGH

$799,000

4 beds2 baths1,773 sq ft

124 Spruce St #124, Watertown, MA 02472

Two-level condo • Natural sunlight • Soaring ceilings

OPEN SUN, 12PM TO 1PM

$395,000

2 beds1 bath725 sq ft

183 Mt Auburn St #15, Watertown, MA 02472

Quartz countertops • Private storage • $445 HOA

$405,000

1 bed1 bath767 sq ft

121 Tremont St Unit C6, Brighton, MA 02135

Private balcony • $526 HOA • Parking

New listings for sale in 02472

OPEN SUN, 1PM TO 2:30PM

$397,000

2 beds1 bath600 sq ft

50 Carey Ave #9, Watertown, MA 02472

Open-concept design • Granite countertops • Updated cabinetry

$575,000

1 bed1 bath840 sq ft

151 Coolidge Ave #608, Watertown, MA 02472

Recently renovated • Open floor plan • Two parking spaces

$1,595,000

4 beds4.5 baths3,284 sq ft

200 Belmont St Unit U01, Watertown, MA 02472

New construction • Custom millwork • Open concept layout

OPEN SUN, 12PM TO 1:30PM

$774,900

3 beds1 bath2,224 sq ft

54 Jensen Rd, Watertown, MA 02472

Fenced-in yard • Bonus sunroom • Hardwood floors

OPEN SUN, 2:30PM TO 4:30PM3D WALKTHROUGH

$899,000

3 beds2.5 baths1,344 sq ft

559 Main St, Watertown, MA 02472

Three-season sunroom • Fully fenced yard • 5,294 sq ft lot

OPEN SUN, 12PM TO 2PMVIDEO TOUR

$539,000

2 beds1 bath896 sq ft

90 Cypress St #2, Watertown, MA 02472

Top-floor living • Renovated kitchen • Induction cooking

$850,000

6 beds2.5 baths3,078 sq ft

40-42 Irving St, Watertown, MA 02472

Backyard • 8,720 sq ft lot • 4 parking spots

OPEN SUN, 11:30AM TO 1PM

$1,295,000

3 beds3 baths2,331 sq ft

25 Beechwood Ave #2, Watertown, MA 02472

Newly renovated • Gourmet kitchen • Custom cabinetry

OPEN SUN, 11:30AM TO 1PM

$1,195,000

3 beds3 baths2,034 sq ft

194 N Beacon St #1, Watertown, MA 02472

Newly renovated • Gourmet kitchen • Custom cabinetry

Home values near 23 Union St

Data from public records.

Address	Redfin Estimate
13 Union St, Watertown, MA 4 Beds \| 3.5 Baths \| 3062 Sq. Ft.	—
24 Union St, Watertown, MA 6 Beds \| 2 Baths \| 2874 Sq. Ft.	$1,150,136

Address	Redfin Estimate
17 Union St, Watertown, MA 7 Beds \| 3 Baths \| 3808 Sq. Ft.	$1,296,189
22 Union St Apartment 20, Watertown, MA 5 Beds \| 4 Baths \| 3375 Sq. Ft.	$1,291,366

Address	Redfin Estimate
30 Union St, Watertown, MA 8 Beds \| 3 Baths \| 3597 Sq. Ft.	$1,304,874
14 Union St, Watertown, MA 6 Beds \| 2 Baths \| 2868 Sq. Ft.	$1,099,839

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.

02138 homes for sale
02478 homes for sale
02135 homes for sale
02472 homes for sale
02453 homes for sale

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

About this home

Redfin Estimate

Earn from this home

Market trends in 02472, MA

Sale history for 23 Union St

Tax history for 23 Union St

Property details

Around this home

Schools

Lifestyle

Local insights from Redfin agents

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 02472

Home values near 23 Union St

More real estate resources