Google street view image for 15 Union St Unit R, Charlestown, MA 02129

OFF MARKET

$2,040,707

•

4 ba

•

3,870

sq ft

15 Union St Unit R, Charlestown, MA 02129

About this home

15 Union St Unit R is a 3,870 square foot multi-family home on a 3,049 square foot lot with 6 bedrooms and 4 bathrooms. Based on Redfin's Charlestown data, we estimate the home's value is $2,040,707.

Multi-familyProperty Type

2009Year Built

3,049 sq ftLot Size

$527Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$2,040,707

$47K since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 27.5% lower than the average sale price ($2.81M) of 6 comparable homes.

SOLD JUL 12, 2026
$2,175,000
A
4 beds3.5 baths2,304 sq ft
71 School St, Charlestown, MA 02129
SOLD AUG 3, 2026
$2,760,000
B
5 beds3.5 baths3,300 sq ft
419 Main St, Charlestown, MA 02129
SOLD JUN 30, 2026
$2,550,000
C
3 beds3.5 baths3,178 sq ft
24 N Mead St, Charlestown, MA 02129
SOLD JUN 10, 2026
$2,150,000
D
4 beds3.5 baths2,227 sq ft
21 Wesley St, Charlestown, MA 02129
SOLD APR 7, 2026
$1,650,500
E
8 beds3.5 baths3,194 sq ft
6-8 School St, Charlestown, MA 02129
SOLD JUL 23, 2026
$5,600,000
F
5 beds3.5 baths3,849 sq ft
41 Chestnut St, Boston, MA 02108

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

Earn from this home

Sell

$1,938,570

Est. take-home

List your home with Redfin and save $10,204

Market trends in Thompson Square-Bunker Hill, MA

Last updated August 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

102.0%

+0.3% MoM

Median sale price

$1.2M

$67K MoM

Avg. days on market

16d

1 days MoM

Recently sold homes

13 MoM

New listings for sale

$850,000
3 beds1.5 baths1,897 sq ft
15 Russell St, Charlestown, MA 02129
EARLY ACCESS
Unknown
1 bed1.5 baths780 sq ft
35 Mystic St #1, Charlestown, MA 02129
NEW 1 DAY AGO
$817,000
2 beds2 baths963 sq ft
73 Chelsea St #305, Charlestown, MA 02129
$775,000
2 beds2 baths1,262 sq ft
25 Brighton St #1, Charlestown, MA 02129
FOR SALE BY OWNER
$899,000
2 beds1 bath1,026 sq ft
5 Cordis Street Ave, Charlestown, MA 02129
$519,900
1 bed1 bath687 sq ft
42 Eighth St #1305, Charlestown, MA 02129
$2,299,000
4 beds3.5 baths2,745 sq ft
56 Belmont St #2, Charlestown, MA 02129
See all

Provided by Redfin

Sale history for 15 Union St Unit R

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

Year

Property tax

Land + Additions

Assessment*

2023

$16,327 (+1.7%)

$285,500 + $1,234,700

$1,520,200

2022

$16,059 (+2.0%)

$277,200 + $1,198,800

$1,476,000

2021

$15,749 (+8.0%)

$277,200 + $1,198,800

$1,476,000

2020

$14,584 (+10.2%)

$268,500 + $1,112,600

$1,381,100

2019

$13,237 (+7.6%)

$202,950 + $1,052,925

$1,255,875

2018

$12,298 (+4.0%)

$202,950 + $970,500

$1,173,450

2017

$11,830 (+3.0%)

$202,950 + $914,100

$1,117,050

2016

$11,484 (−11.9%)

$202,950 + $841,050

$1,044,000

2015

$13,034 (+21.7%)

$329,400 + $746,900

$1,076,300

2014

$10,709 (−16.1%)

$247,100 + $604,200

$851,300

2013

$12,766 (+250.4%)

$329,400 + $642,100

$971,500

2012

$3,643

$137,970 + $141,390

$279,360

Tax history for 15 Union St Unit R

Year

Property tax

Land + Additions

Assessment*

2023

$16,327 (+1.7%)

$285,500 + $1,234,700

$1,520,200

2022

$16,059 (+2.0%)

$277,200 + $1,198,800

$1,476,000

2021

$15,749 (+8.0%)

$277,200 + $1,198,800

$1,476,000

2020

$14,584 (+10.2%)

$268,500 + $1,112,600

$1,381,100

2019

$13,237 (+7.6%)

$202,950 + $1,052,925

$1,255,875

2018

$12,298 (+4.0%)

$202,950 + $970,500

$1,173,450

2017

$11,830 (+3.0%)

$202,950 + $914,100

$1,117,050

2016

$11,484 (−11.9%)

$202,950 + $841,050

$1,044,000

2015

$13,034 (+21.7%)

$329,400 + $746,900

$1,076,300

2014

$10,709 (−16.1%)

$247,100 + $604,200

$851,300

2013

$12,766 (+250.4%)

$329,400 + $642,100

$971,500

2012

$3,643

$137,970 + $141,390

$279,360

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

Zoning

CHARLESTOWN NEIGHBORHOOD-3F-2000

NDOD-BUNKER HILL

RESTRICTED ROOF STRUCTURE DISTRICT

Charlestown Neighborhood-Three-Family Residential Subdistrict

The Three-Family Residential (3F) Subdistricts are established to preserve low density three-family areas with a variety of housing types appropriate to the existing fabric, including one-, two-, and three-family Dwellings, to preserve existing structures, to provide for new infill construction appropriate to the existing fabric, and to allow minor changes to occur as-of-right. In a 3F Subdistrict, the maximum number of Dwelling Units allowed in a single structure, or in any combination of semi-attached or attached structures (including semi-attached Dwellings, Town Houses, and Row Houses) is 3.

Zone overlays

Restricted Roof Structure Overlay District In the East Boston Neighborhood District

Permitted uses

Include but are not limited to:

Religious facility
Day care facility
Housing-Group
Housing-Multiple units
Bed & breakfast
Educational/school
Fire house
Library
Park & open space

Property details

Interior

Bathroom Information
# of Full Baths: 4

Heating & Cooling
Heating Type: Forced Air

Fireplace Information
# of Fireplaces: 2
Has Fireplace

Room Information
# of Rooms: 10

Exterior

Exterior Information
Physical Condition: Good
Building Style Type: Duplex
Exterior Wall: Wood Siding/Shingle
Roof Covering Type: Rubber/Elastomeric
Roof Shape Type: Flat

Property Information
Living Sq. Ft: 3,870
Gross Sq. Ft: 5,184
# of Stories: 3

Lot Information
# of Buildings: 1
Land Sq. Ft: 3,049
Municipality Name: BOSTON
Acres: 0.07
Zoning Code: R2
State Use Description: 2-FAMILY RESIDENCE

Financial

Assessor Information
Assessment Year: 2023

Public facts

Beds: 6
Baths: 4.0
Sq. Ft.: 3,870
Stories: 3.0
Lot Size: 3,049 square feet
Style: Multi-Family (2-4 Unit)
Year Built: 2009
Year Renovated: 2009
County: Suffolk County
APN: 4781966

Home facts updated by county records on Jul 20, 2023

Around this home

Schools

Warren-Prescott K-8 School

Public PreK-8 • Assigned • 0.3mi

8/10

Horace Mann School For The Deaf

Public PreK-12 • Assigned • 0.4mi

East Boston High School

Public 7-12 • Assigned • 1.6mi

2/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

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 97° expected this year, 15 days in 30 years

6/10 Wind Factor

67% chance of strong winds in next 30 years

3/10 Air Factor

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

Provided by First Street

Historical weather

Charlestown, MA • 02129

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 9.2 hours in June and 4.4 hours in December, placing it below the U.S. average for solar exposure.

9.2 hrs

4.4 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$1.94M – $2.35M

Reach more buyers when you sell with Redfin. Save up to $20,407 in fees. 3 minutes to get started.

Need the cash from your home fast? Sell to .

Nearby similar homes

NEW 1 HR AGO

$1,050,000

6 beds3 baths2,601 sq ft

190 Bennington, East Boston, MA 02128

$3,145,000

4 beds3.5 baths3,518 sq ft

110 Appleton St, Boston, MA 02116

$1,800,000

4 beds2.5 baths2,224 sq ft

19 Walker St, Charlestown, MA 02129

$4,490,000

10 beds10 baths6,400 sq ft

194-198 Bunker Hill St, Charlestown, MA 02129

$1,925,000

5 beds3 baths2,464 sq ft

43 Lincoln St, Cambridge, MA 02141

$4,490,000

5 beds4 baths2,308 sq ft

89 Green St, Charlestown, MA 02129

New listings for sale in 02129

$850,000

3 beds1.5 baths1,897 sq ft

15 Russell St, Charlestown, MA 02129

EARLY ACCESSCORCORAN® COMING SOON

Unknown

1 bed1.5 baths780 sq ft

35 Mystic St #1, Charlestown, MA 02129

NEW 1 DAY AGO

$817,000

2 beds2 baths963 sq ft

73 Chelsea St #305, Charlestown, MA 02129

$775,000

2 beds2 baths1,262 sq ft

25 Brighton St #1, Charlestown, MA 02129

FOR SALE BY OWNER

$899,000

2 beds1 bath1,026 sq ft

5 Cordis Street Ave, Charlestown, MA 02129

$519,900

1 bed1 bath687 sq ft

42 Eighth St #1305, Charlestown, MA 02129

$2,299,000

4 beds3.5 baths2,745 sq ft

56 Belmont St #2, Charlestown, MA 02129

Home values near 15 Union St Unit R

Data from public records.

Address	Redfin Estimate
23 Union Street Unit 1, Charlestown, MA 2 Beds \| 1 Baths \| 775 Sq. Ft.	$622,000
23 Union Street Unit 4, Charlestown, MA 2 Beds \| 1 Baths \| 714 Sq. Ft.	$814,608

Address	Redfin Estimate
23 Union Street Unit 2, Charlestown, MA 1 Beds \| 1 Baths \| 606 Sq. Ft.	$611,224
21 Union Street, Charlestown, MA 4 Beds \| 2.5 Baths \| 2538 Sq. Ft.	$2,768,709

Address	Redfin Estimate
23 Union Street Unit 3, Charlestown, MA 2 Beds \| 1 Baths \| 699 Sq. Ft.	$751,572
19 Union Street, Charlestown, MA 4 Beds \| 3.5 Baths \| 2300 Sq. Ft.	$2,452,674

More real estate resources

Cities
Neighborhoods
Zip Codes
Minor Civil Divisions
Popular Searches

Cambridge homes for sale
Newton homes for sale
Quincy 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.

02127 homes for sale
02129 homes for sale
02130 homes for sale
02132 homes for sale
02135 homes for sale

Houses for rent in Boston	Agents near me	Quincy, MA homes for sale	Boston 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	Boston Property Records
Condos for sale near me	Lexington, MA homes for sale	MA New Listings

Bunker Hill / Thompson Square homes for sale
Charlestown homes for sale
Thompson Square-Bunker Hill homes for sale