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!

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Basic Information

Gross Income $118,800
Lot Features Other
Mls StatusNew
Parcel Number W:14 P:04135 S:020,1358746

Tax Information

Tax Assessed Value $1,031,900
Tax Year 2025
Taxes$11,949

Parking

Parking Features Off Street
Parking Spaces6

Rooms

Bathroom3
Bathrooms Total Decimal 3
Bedrooms9
Full Bath3

Basic Information

List Price$1,350,000
MLS Number73519103
Modification Date05/15/2026
Property SubType3 Family

Location

Address21 Hosmer Street
Building Number21
CountySuffolk
NeighborhoodMattapan
StateMA
StreetHosmer Street
SubdivisionMattapan
TownBoston
Zip02126

Building

BasementFull
Building Area Units Square Feet
Construction Materials See Remarks
FoundationOther
Levels 3
Patio And Porch Features Porch
Rooms18
Stories3
Units3
Utilities For Gas Range
Year Built1900
Year Built Details Actual
Year Built Source Public Records

Property

Acreage0.1

Interior

Flooring Hardwood

Exterior

RoofShingle

Utilities

Electric 200+ Amp Service
Sewer Public Sewer
Water Source Public

Property Information

Building Area Source Public Records
Living Area 4,056
Lot Size Square Feet 4,225
Lot Size Units Acres
Square Feet4,056

Amenities

Amenities
- Bike Path
- Golf
- Highway Access
- House of Worship
- Laundromat
- Medical Facility
- Park
- Pool
- Private School
- Public School
- Public Transportation
- Shopping
- T-Station
- Tennis Court(s)
- University
- Walk/Jog Trails
Other AmenitiesBasement, Golf, Tennis

Legal

ZoningR3

Other

Date Listed05/14/2026
Farm Land Area Units Square Feet

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Newton, MA

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Newton, MA