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$1,299,000

21 Hosmer St, Boston MA 02126
Boston, MA 02126
Listed by Markese Daise
Bedrooms
9
Bathrooms
3
Living area
4,056 sqft
Year built
1900

About this home

A rare, fully turn-key Mattapan multi-family delivering scale, flexibility, and immediate income in a high-demand Boston market. This oversized 3-family features three expansive 3 bed/1 bath units, each with layouts that can easily function as 4-bedroom apartments maximizing rental potential. Designed for today’s buyer, the property offers central air, updated electrical, hardwood floors, modern kitchens & baths, new siding, newer rubber roof, & decks throughout. The building is well-maintained with a strong in-place rent roll, creating a true plug-and-play investment or an ideal opportunity for an owner-occupant to offset their mortgage with substantial income. ***NOTE***Additional upside: the identical neighboring property at 19 Hosmer St is also available...purchase one or secure both for a scalable $240K+ gross annual rent play. Positioned near public transit, retail, and many amenities, this is a high-performing Boston multi-family with long-term appreciation and income growth!

Property details

MLS #
73519103
Property type
3 Family
Subdivision
N/A
Status
Active
Days on market
N/A
On market date
N/A
Stories
3
Garage spaces
N/A
Lot size
0.1 acres
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Nearby schools

Within 10 miles · public school directory data (NCES)

Elementary
Young Achievers
0.22 mi away · Grades -1-8
Nearest school -- attendance-zone data not available here
4.0
Local Score (student-teacher ratio only (preliminary -- will incorporate state test-score data once available)) -- not an official state rating
Enrollment
555
Student:teacher ratio
12.6:1
District
Boston
Middle
Charles S Pierce Middle
1.64 mi away · Grades 6-8
Nearest school -- attendance-zone data not available here
4.0
Local Score (student-teacher ratio only (preliminary -- will incorporate state test-score data once available)) -- not an official state rating
Enrollment
928
Student:teacher ratio
12.1:1
District
Milton
High
Boston International High School
0.52 mi away · Grades 9-12
Nearest school -- attendance-zone data not available here
5.0
Local Score (student-teacher ratio only (preliminary -- will incorporate state test-score data once available)) -- not an official state rating
Enrollment
421
Student:teacher ratio
8.4:1
District
Boston

Mortgage calculator

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Est. monthly payment
$7,973/mo
$259,800 down
$1,039,200 loan
Principal & interest$6,740
Property tax (est.)$1,083
Home insurance (est.)$150

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Data source: Listing information provided by MLS Property Information Network via Trestle/CoreLogic. Last updated June 8, 2026.

Information herein deemed reliable but not guaranteed; all measurements, school assignments, HOA fees, taxes, and feature lists are approximate and should be independently verified. Equal Housing Opportunity.