Rendering of Dartmouth Street entrance in final condition
The following is an update on construction activity for the Back Bay Station Concourse Renovation Project.
Please allow an extra five minutes as you get used to new construction zones and paths of travel at the station.
Current ACTIVITIES AND impacts
Crews are continuing to prepare for major construction as part of the Pre-Construction (Enabling) Phase. Current construction activities include:
Constructing the new bike cage outside at the Clarendon Street entrance of the station.
Building electrical infrastructure throughout the station.
Preparing for steel delivery.
Constructing the new MBTA HUB.
See the below graphic for more details on the location of work zones and station layout currently in place.
Current work zone locations as of 09/09/2025
Upcoming Activities and Impacts
Orange Line Staircase Impacts
In order to accommodate steel delivery, the following impacts to Orange Line stairs will be in place:
From the morning of September 15 to evening of September 16, the east staircase to the Orange Line (closest to Clarendon Street) will be closed all day.
From the morning of September 22 to the evening of September 23, the west staircase to the Orange Line (closest to Dartmouth Street) will be closed all day.
The elevator and central staircase to the Orange Line platform will remain open at all times.
Clarendon Street Door to Close in Late September
Beginning in late September, a new work zone layout will be established within the station. To accommodate this new layout, the northeast door to Clarendon Street will be closed. The other door to Clarendon Street will remain open at all times throughout construction. This door will remain closed until Summer 2026 to accommodate Phase 1 construction.
See the below graphic for the new layout of the station beginning later this month:
New work zone layout beginning late September
New Bike Cage
Beginning in November/December, the new bike cage will open outside the station at the Clarendon Street entrance. Once this new bike cage is in place, the existing bike cage within the concourse will be closed and removed.
More information will be shared later this fall as the schedule is finalized, and advanced notice will be provided to customers.