MGH pushes ahead with nearly $2 billion expansion Two new buildings on Cambridge Street would have hundreds of private rooms for patients, and the project would also reshape a busy commuter corridor in downtown Boston By Priyanka Dayal McCluskey and Tim Logan Globe Staff,Updated April 22, 2021, 1 hour ago Email to a Friend A rendering of the two connected towers that Massachusetts General Hospital wants to build on Cambridge Street.Courtesy of MGH and NBBJ Massachusetts General Hospital is pushing forward with a massive $1.9 billion project to build hundreds of private patient rooms and reinforce its focus on treating the sickest patients at its downtown campus, while also remaking a critical corner of Boston and potentially boosting public transit to boot.