Endless Potential in Prime Dorchester Location! Welcome to 21 McLellan Street—a classic Philadelphia-style two-family home brimming with opportunity. Perfect for investors, contractors, or savvy owner-occupants looking to customize and build equity, this property offers a solid footprint and a flexible layout. Situated on a generous lot with ample off-street parking, this property is located in a convenient Dorchester neighborhood, close to public transportation, local shops, parks, and major commuter routes. With its desirable layout and untapped potential, 21 McLellan is ready to be transformed into a standout multi-family residence. Bring your ideas and contractor—this is a rare value-add opportunity you won’t want to miss.
| Units | 2 |
| Living area | 3,779 sqft |
| Lot size | 4,831 sqft |
| Year built | 1910 |
| Price / sqft | $185 |
| County | Suffolk |
| MLS # | 73590040 |
| Days on market | 0 days |
| Listed on | October 13, 2026 |
| Annual property tax | $4,049 |
| Tax year | 2026 |
| Assessed value | $326,500 |
| Zoning | R2 |
| Total actual rent | $0/mo |
| Stories | 4 |
| Total rooms | 15 |
| Lot size | 0.11 acres |
| Garage spaces | 0 |
| Parking spaces | 4 |
| Parking | Paved Drive |
| Basement | Full |
| Foundation | Stone |
| Roof | Shingle |
| Construction | Frame |
| Sewer | Public Sewer |
| Water | Public |
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Listing courtesy of a MLS PIN member office. Listing data © MLS PIN.
Auto-generated from the listing data — richer AI answers coming with the live site.
It is a 2-unit multi-family property with 3,779 sqft of living area, built in 1910.
21 Mclellan Street, Boston MA 02121 has been listed for 0 days (since October 13, 2026).
At a list price of $699,900 across 2 units, that works out to roughly $349,950 per unit.
Annual property taxes are $4,049 (2026), on an assessed value of $326,500.
At $699,900 for 3,779 sqft, that's about $185 per square foot.
4 total parking spaces (paved drive).
21 Mclellan Street, Boston MA 02121 is in Boston, Suffolk County, MA 02121.

Justin Rollo is a Broker Associate with Signal Real Estate (MA Lic. #9534264) and a lifelong Massachusetts resident. Over 14 years and hundreds of transactions, he has worked investment properties — multi-families and house-hacking — across Greater Boston full-time. Away from real estate, Justin is a proud dad, youth coach and local school-committee member — and a former professional poker player who still loves golf and following local sports.