As of Apartment List's November 2026 report, Boston's citywide median rent was $2,359 for a one-bedroom and $2,484 for a two-bedroom. An ADU's rent depends on its size, finishes, privacy, transit access and the street it is on. Other rent trackers report different medians, so treat any single figure as a starting point.
What do Boston rents look like?
Apartment List's Boston report, labeled November 2026 when we checked it at the end of October, gave a citywide median of $2,359 for a one-bedroom apartment and $2,484 for a two-bedroom. Medians blend every kind of unit, from older walk-ups to new buildings with amenities, and different services measure rent in different ways.
What sets an ADU's rent?
- Size and layout. With a 900 sq ft cap under state law, most ADUs are studios, one-bedrooms or compact two-bedrooms.
- Privacy. A detached cottage with its own entrance usually rents better than a unit reached through shared space.
- Light and height. A basement unit competes on price; an attic with good windows can compete on character.
- Transit and location. Distance to the Red, Green or Orange Line matters to many Boston renters.
- Utilities. Whether heat and electricity are included or separately metered.
What limits how I can rent it?
- In Boston, the current interior ADU path is for owner-occupants, so you live in one of the two units.
- Outside Boston, the state law bars owner-occupancy requirements, so both units can be rented.
- Short-term rentals may be restricted. See the short-term rental guide.
Will the rent cover the cost?
It depends on your financing, your taxes and your budget. A new unit adds assessed value, which can raise property taxes, and loan terms vary widely. We give you a written, itemized build price so you can run the numbers with your lender or accountant; we do not promise a return.
Related
Sources, as of October 2026: Apartment List, Boston Rent Report (November 2026 edition); Mass.gov, Accessory Dwelling Units; Boston Planning Department.
Updated October 2026