Google street view image for 30 Union St, Watertown, MA 02472

Off market

$1,294,019

•

3 ba

•

3,597

sq ft

30 Union St, Watertown, MA 02472

About this home

30 Union St is a 3,597 square foot multi-family home on a 5,227 square foot lot with 8 bedrooms and 3 bathrooms. Based on Redfin's Watertown data, we estimate the home's value is $1,294,019.

Multi-familyProperty Type

1920Year Built

5,227 sq ftLot Size

$360Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$1,294,019

$13K since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 4.4% higher than the average sale price ($1.24M) of 6 comparable homes.

SOLD OCT 5, 2026
$1,327,000
A
6 beds3 baths4,285 sq ft
28 Morse St, Watertown, MA 02472
SOLD AUG 7, 2026
$1,030,000
B
4 beds2 baths3,606 sq ft
34-36 Morton St, Watertown, MA 02472
SOLD AUG 30, 2026
$1,690,000
C
6 beds3 baths2,736 sq ft
133 Waban, Newton, MA 02458
SOLD OCT 9, 2026
$1,025,000
D
5 beds2 baths2,614 sq ft
601-603 Main St, Watertown, MA 02472
SOLD OCT 7, 2026
$1,315,000
E
6 beds3 baths3,365 sq ft
249 Crafts St, Newton, MA 02460
SOLD SEP 8, 2026
$1,050,000
F
4 beds2 baths2,717 sq ft
38-40 Pequossette St, Watertown, MA 02472

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Earn from this home

Sell

$1,228,887

Est. take-home

List your home with Redfin and save $6,470

Market trends in 02472, MA

Last updated October 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

100.5%

+0.1% MoM

Median sale price

$880K

$5K MoM

Avg. days on market

22d

0 days MoM

Recently sold homes

14 MoM

New listings for sale

EARLY ACCESS
$1,200,000
3 beds2 baths2,519 sq ft
125 Lovell Rd, Watertown, MA 02472
$769,900
3 beds1 bath1,113 sq ft
54 Evans St, Watertown, MA 02472
$629,000
2 beds2 baths1,270 sq ft
151 Coolidge Ave #404, Watertown, MA 02472
OPEN FRI, 12PM TO 2PM
$3,190,000
8 beds9 baths6,568 sq ft
198-200 Belmont St, Watertown, MA 02472
EARLY ACCESS
$1,100,000
3 beds3 baths2,028 sq ft
5 Winter St #5, Watertown, MA 02472
$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
OPEN FRI, 12PM TO 2PM
$1,595,000
4 beds4.5 baths3,284 sq ft
200 Belmont St Unit U01, Watertown, MA 02472
VIDEO TOUR
$539,000
2 beds1 bath896 sq ft
90 Cypress St #2, Watertown, MA 02472
$1,295,000
3 beds3 baths2,331 sq ft
25 Beechwood Ave #2, Watertown, MA 02472
See all

Provided by Redfin

Sale history for 30 Union St

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

Year

Property tax

Land + Additions

Assessment*

2026

$14,333 (+7.7%)

$521,700 + $653,100

$1,174,800

2025

$13,312 (+12.3%)

$521,700 + $618,000

$1,139,700

2024

$11,859 (−11.4%)

$507,800 + $505,800

$1,013,600

2023

$13,387 (+7.3%)

$485,700 + $500,100

$985,800

2022

$12,480 (+11.9%)

$441,600 + $500,300

$941,900

2021

$11,152 (+3.7%)

$426,800 + $483,600

$910,400

2020

$10,756 (+3.2%)

$412,100 + $473,900

$886,000

2019

$10,421 (+4.4%)

$412,100 + $397,000

$809,100

2018

$9,984 (+2.7%)

$382,700 + $358,500

$741,200

2017

$9,723 (+4.3%)

$334,800 + $365,200

$700,000

2016

$9,324 (+11.1%)

$316,400 + $365,200

$681,600

2015

$8,394 (+4.6%)

$279,600 + $278,900

$558,500

2014

$8,026 (+1.9%)

$261,200 + $275,300

$536,500

2013

$7,876 (+4.8%)

$261,200 + $275,300

$536,500

2012

$7,514 (−0.4%)

$246,500 + $275,300

$521,800

2011

$7,547 (+2.2%)

$241,000 + $301,200

$542,200

2010

$7,388 (+4.5%)

$253,900 + $301,200

$555,100

2009

$7,069

$277,600 + $299,900

$577,500

Tax history for 30 Union St

Year

Property tax

Land + Additions

Assessment*

2026

$14,333 (+7.7%)

$521,700 + $653,100

$1,174,800

2025

$13,312 (+12.3%)

$521,700 + $618,000

$1,139,700

2024

$11,859 (−11.4%)

$507,800 + $505,800

$1,013,600

2023

$13,387 (+7.3%)

$485,700 + $500,100

$985,800

2022

$12,480 (+11.9%)

$441,600 + $500,300

$941,900

2021

$11,152 (+3.7%)

$426,800 + $483,600

$910,400

2020

$10,756 (+3.2%)

$412,100 + $473,900

$886,000

2019

$10,421 (+4.4%)

$412,100 + $397,000

$809,100

2018

$9,984 (+2.7%)

$382,700 + $358,500

$741,200

2017

$9,723 (+4.3%)

$334,800 + $365,200

$700,000

2016

$9,324 (+11.1%)

$316,400 + $365,200

$681,600

2015

$8,394 (+4.6%)

$279,600 + $278,900

$558,500

2014

$8,026 (+1.9%)

$261,200 + $275,300

$536,500

2013

$7,876 (+4.8%)

$261,200 + $275,300

$536,500

2012

$7,514 (−0.4%)

$246,500 + $275,300

$521,800

2011

$7,547 (+2.2%)

$241,000 + $301,200

$542,200

2010

$7,388 (+4.5%)

$253,900 + $301,200

$555,100

2009

$7,069

$277,600 + $299,900

$577,500

*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: 1,425

Bathroom Information
# of Full Baths: 3

Heating & Cooling
Heating Type: Forced Air

Fireplace Information
# of Fireplaces: 2
Has Fireplace

Room Information
# of Rooms: 14

Exterior

Exterior Information
Physical Condition: Average
Building Style Type: Duplex
Construction Type: Frame
Roof Shape Type: Gable

Property Information
Living Sq. Ft: 3,597
Gross Sq. Ft: 6,206
# 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: 8
Baths: 3.0
Sq. Ft.: 3,597
Stories: 3.0
Lot Size: 5,227 square feet
Style: Multi-Family (2-4 Unit)
Year Built: 1920
Year Renovated: —
County: Middlesex County
APN: 554029S

Home facts updated by county records on Sep 10, 2026

Around this home

Schools

K - 12
Preschool & daycare

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...
2 months 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...
2 months ago • Watertown
Kyle MacNichol
Redfin Premier agent
59 deals
Was this helpful?

Climate risks

1/10 Flood Factor

Minimal risk of a flood reaching the building in the next 30 years

1/10 Fire Factor

Unlikely to be in a wildfire in next 30 years

6/10 Heat Factor

7 days above 96° expected this year, 15 days in 30 years

6/10 Wind Factor

54% chance of strong winds in next 30 years

3/10 Air Factor

2 unhealthy days expected this year, 3 days in 30 years

Provided by First Street

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

$1.23M – $1.49M

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EARLY ACCESSCOLDWELL BANKER REALTY COMING SOON

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EARLY ACCESSCOMPASS COMING SOON

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Home values near 30 Union St

Data from public records.

Address	Redfin Estimate
35 Union Street, Watertown, MA 5 Beds \| 2 Baths \| 3252 Sq. Ft.	$1,272,167
24 Union Street, Watertown, MA 6 Beds \| 2 Baths \| 2874 Sq. Ft.	$1,141,162
27 Union Street, Watertown, MA 2 Beds \| 1.5 Baths \| 1147 Sq. Ft.	$628,430
25 Union Street #2, Watertown, MA 2 Beds \| 1 Baths \| 1099 Sq. Ft.	$578,422
20 Union Street, Watertown, MA 7 Beds \| 3 Baths \| 3276 Sq. Ft.	$1,295,979
34 Union Street #2, Watertown, MA 5 Beds \| 2 Baths \| 2328 Sq. Ft.	$1,049,400
29 Eliot Street #27, Watertown, MA 4 Beds \| 2 Baths \| 3428 Sq. Ft.	$1,120,137

Address	Redfin Estimate
38 Union Street, Watertown, MA 4 Beds \| 3 Baths \| 3103 Sq. Ft.	$1,188,792
22 Union Street #20, Watertown, MA 5 Beds \| 4 Baths \| 3375 Sq. Ft.	$1,297,882
34 Union Street #1, Watertown, MA 3 Beds \| 1.5 Baths \| 1670 Sq. Ft.	$753,994
29 Union Street #29, Watertown, MA 3 Beds \| 1.5 Baths \| 1287 Sq. Ft.	$723,089
34 Union Street #1, Watertown, MA 3 Beds \| 1.5 Baths \| 1125 Sq. Ft.	$687,675
27 Union Street, Watertown, MA 2 Beds \| 1.5 Baths \| 1147 Sq. Ft.	$666,970
35 Eliot Street, Watertown, MA 3 Beds \| 2.5 Baths \| 1637 Sq. Ft.	$893,403

Address	Redfin Estimate
34 Union Street, Watertown, MA 6 Beds \| 2.5 Baths \| 4172 Sq. Ft.	$1,232,874
29 Union Street, Watertown, MA 6 Beds \| 2 Baths \| 2464 Sq. Ft.	$1,080,322
34 Union Street #2, Watertown, MA 5 Beds \| 2 Baths \| 2500 Sq. Ft.	$922,305
27 Union Street #27, Watertown, MA 2 Beds \| 1.5 Baths \| 1368 Sq. Ft.	$682,235
25 Union Street, Watertown, MA 2 Beds \| 1 Baths \| 1284 Sq. Ft.	$627,718
25 Eliot Street #23, Watertown, MA 6 Beds \| 2 Baths \| 4083 Sq. Ft.	$1,237,013
23 Eliot Street, Watertown, MA 4 Beds \| 2.5 Baths \| 2925 Sq. Ft.	$1,131,539

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About this home

Redfin Estimate

Earn from this home

Market trends in 02472, MA

Sale history for 30 Union St

Tax history for 30 Union St

Property details

Around this home

Schools

Lifestyle

Local insights from Redfin agents

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 02472

Home values near 30 Union St

More real estate resources