Exceptional six-family investment opportunity just steps from Kendall Square. This well-maintained three-story building features two units per floor. The two ground-level units offer private entrances, while the upper-level units are accessed via shared entrances—one for the left-side units on the second and third floors, and one for the right side. Four units (on the ground and second floors) include 2 bedrooms and 1 bathroom, while the two top-floor units feature 3 bedrooms and 1 bathroom. The property has been professionally managed, and all units are in excellent condition. Strong rental income with a cap rate above 5%. Flexible ownership options: occupy one unit and rent the others or operate all six as income-generating rentals. All current leases end on Aug 31, 2026. A full basement with over 1,800 square feet offers significant potential for additional use or future finishing. See attached interactive floor plans and 3D tour for a detailed view of the property.
| Units | 6 |
| Living area | 5,267 sqft |
| Lot size | 4,049 sqft |
| Year built | 1915 |
| Price / sqft | $680 |
| County | Middlesex |
| MLS # | 73506308 |
| Days on market | 9 days |
| Listed on | April 23, 2026 |
| Annual property tax | $15,150 |
| Tax year | 2026 |
| Assessed value | $2,271,300 |
| Zoning | C-1 |
| Gross income (actual) | $20,050/yr |
| Net operating income (actual) | $194,400/yr |
| Total actual rent | $20,050/mo |
| Stories | 5 |
| Total rooms | 33 |
| Lot size | 0.09 acres |
| Garage spaces | 0 |
| Parking spaces | 0 |
| Parking | On Street |
| Basement | Full, Unfinished |
| Foundation | Stone |
| Roof | Tar/Gravel |
| Construction | Stone |
| Flooring | Tile, Vinyl, Hardwood |
| Sewer | Public Sewer |
| Water | Public |
| Utilities | for Gas Range |
More about investing in Cambridge →
Listing courtesy of Coldwell Banker Realty - Cambridge — Nathan Long. Listing data © MLS PIN.
Auto-generated from the listing data — richer AI answers coming with the live site.
It is a 6-unit multi-family property with 5,267 sqft of living area, built in 1915.
9-15 Berkshire St, Cambridge MA 02141 sold after about 134 days on the market (listed April 23, 2026, closed September 4, 2026).
Based on area median rents, the estimated cap rate is about 4.4%, with a Signal Score of 78/100. These are directional estimates, not an appraisal.
At a list price of $3,698,000 across 6 units, that works out to roughly $616,333 per unit.
Annual property taxes are $15,150 (2026), on an assessed value of $2,271,300.
At $3,698,000 for 5,267 sqft, that's about $680 per square foot.
9-15 Berkshire St, Cambridge MA 02141 is in Cambridge, Middlesex County, MA 02141.

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.