Scale, history, and value rarely align like this on the flat of Charlestown. Spanning four levels and 3,360 square feet, this 1880 brick brownstone offers more space, more parking, and more fireplaces than nearly anything else in the neighborhood today, at a price that leaves real room in the budget. The main and upper levels live as a gracious single-family home with an updated kitchen, formal dining room, four fireplaces, and a private deck and patio. A garden-level suite with its own entry adds flexibility as a guest suite or office, plus a clear path to reconfiguring the upper floors into the two-bedroom, single-level layout Charlestown families want. A deeded heated garage plus two more spaces round out a rare three-car footprint near Main Street, the Navy Yard, and the waterfront. A newly improved price on a home with room to make it your own.
| Units | 2 |
| Living area | 3,360 sqft |
| Lot size | 1,946 sqft |
| Year built | 1880 |
| Price / sqft | $759 |
| County | Suffolk |
| MLS # | 73504174 |
| Days on market | 130 days |
| Listed on | April 20, 2026 |
| Annual property tax | $17,400 |
| Tax year | 2025 |
| Assessed value | $1,502,600 |
| Zoning | R2 |
| Gross income (actual) | $30,000/yr |
| Net operating income (actual) | $30,000/yr |
| Total actual rent | $2,500/mo |
| Stories | 4 |
| Total rooms | 12 |
| Lot size | 0.04 acres |
| Garage spaces | 1 |
| Parking spaces | 2 |
| Basement | Full, Finished, Walk-Out Access, Interior Entry |
| Foundation | Other |
| Roof | Rubber |
| Construction | Brick |
| 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 3,360 sqft of living area, built in 1880.
12 Auburn St, Boston MA 02129 has been listed for 130 days (since April 20, 2026).
At a list price of $2,549,000 across 2 units, that works out to roughly $1,274,500 per unit.
Annual property taxes are $17,400 (2025), on an assessed value of $1,502,600.
At $2,549,000 for 3,360 sqft, that's about $759 per square foot.
1 garage space and 2 total parking spaces.
12 Auburn St, Boston MA 02129 is in Boston, Suffolk County, MA 02129.

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.