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!
For sale
Price cut: $51K (6/4)
$1,299,000
21 Hosmer St, Mattapan, MA 02126
9beds
4,056sqft
3 Family
Built in 1900
-- sqft lot
$1,256,400 Zestimate®
$320/sqft
$-- HOA
What's special
Central airNewer rubber roofNew sidingDecks throughoutHardwood floorsModern kitchens and bathsUpdated electrical
- 61 days |
- 88 |
- 3 |
Zillow last checked:
Listing updated:
Listed by:
Markese Daise 617-905-4014,
Stony Brook & Lennox Realty Advisors 617-531-9077
Source: MLS PIN,MLS#: 73519103
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Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 9
- Bathrooms: 3
- Full bathrooms: 3
Features
- Flooring: Hardwood
- Basement: Full
- Has fireplace: No
Interior area
- Total structure area: 4,056
- Total interior livable area: 4,056 sqft
- Finished area above ground: 4,056
Property
Parking
- Total spaces: 6
- Parking features: Off Street
- Uncovered spaces: 6
Features
- Patio & porch: Porch
Lot
- Size: 4,225 Square Feet
- Features: Other
Details
- Parcel number: W:14 P:04135 S:020,1358746
- Zoning: R3
Construction
Type & style
- Home type: MultiFamily
- Property subtype: 3 Family
Materials
- See Remarks
- Foundation: Other
- Roof: Shingle
Condition
- Year built: 1900
Utilities & green energy
- Electric: 200+ Amp Service
- Sewer: Public Sewer
- Water: Public
- Utilities for property: for Gas Range
Community & HOA
Community
- Features: Public Transportation, Shopping, Pool, Tennis Court(s), Park, Walk/Jog Trails, Golf, Medical Facility, Laundromat, Bike Path, Highway Access, House of Worship, Private School, Public School, T-Station, University
Location
- Region: Mattapan
Financial & listing details
- Price per square foot: $320/sqft
- Tax assessed value: $1,031,900
- Annual tax amount: $11,949
- Date on market: 5/14/2026
- Total actual rent: 9900
Estimated market value
$1,256,400
$1.19M - $1.32M
$3,539/mo
Price history
| Date | Event | Price |
|---|---|---|
| 6/4/2026 | Price change | $1,299,000-3.8%$320/sqft |
Source: MLS PIN #73519103 Report a problem | ||
| 5/14/2026 | Listed for sale | $1,350,000+350%$333/sqft |
Source: MLS PIN #73519103 Report a problem | ||
| 5/12/2014 | Sold | $300,000-10.4%$74/sqft |
Source: Public Record Report a problem | ||
| 8/24/2007 | Sold | $335,000$83/sqft |
Source: Public Record Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $11,949 +12.1% | $1,031,900 +5.5% |
| 2024 | $10,661 +8.6% | $978,100 +7% |
| 2023 | $9,817 +8.6% | $914,100 +10% |
| 2022 | $9,041 +2% | $831,000 |
| 2021 | $8,867 +21.3% | $831,000 +20% |
| 2020 | $7,311 +10.2% | $692,300 +10% |
| 2019 | $6,632 +12.7% | $629,200 +12% |
| 2018 | $5,887 +444.4% | $561,700 +2% |
| 2017 | $1,081 -75% | $550,700 +40.1% |
| 2016 | $4,325 +12.6% | $393,200 +24% |
| 2015 | $3,841 +7.8% | $317,200 +12% |
| 2014 | $3,563 +0.5% | $283,200 +5% |
| 2013 | $3,544 -1.5% | $269,700 -2.2% |
| 2012 | $3,598 +2% | $275,900 |
| 2011 | $3,529 +6.6% | $275,900 -1% |
| 2010 | $3,310 -5.8% | $278,600 -15.7% |
| 2009 | $3,514 -27.3% | $330,600 -25% |
| 2008 | $4,834 -4.2% | $440,700 -4% |
| 2007 | $5,044 | $459,000 |
Find assessor info on the county website
Monthly payment
Est. payment
Payment breakdown
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Neighborhood: Mattapan
Nearby schools
GreatSchools rating
- 3/10Young Achievers Science and Math SchoolGrades: PK-8Distance: 0.2 mi
- 1/10Boston International High SchoolGrades: 9-12Distance: 0.5 mi
- 3/10Pauline Agassiz Shaw Elementary SchoolGrades: PK-6Distance: 0.2 mi
- $1,299,0009 bd3 ba4k sqft19 Hosmer St, Mattapan, MA 02126For Sale
- $--2 bd1 ba1k sqft25 Hosmer St #1, Mattapan, MA 02126Off Market
- $--3 bd2 ba1.2k sqft25 Hosmer St #2, Mattapan, MA 02126Off Market
- $--2 bd1 ba1k sqft25 Hosmer St #1R, Mattapan, MA 02126Off Market
- $--2 bd1 ba1k sqft25 Hosmer St APT 2R, Boston, MA 02126Off Market
- $598,9002 bd1 ba1k sqft25 Hosmer St APT 2L, Boston, MA 02126Off Market
- $--2 bd1 ba1k sqft25 Hosmer St APT 3L, Boston, MA 02126Off Market
- $--2 bd1 ba1k sqft25 Hosmer St APT 3R, Boston, MA 02126Off Market
A local agent can set up tours, give advice and negotiate with sellers.
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