In their quest to increase Fenway Park's capacity and revenue, the new Red Sox organization first added 274 seats atop the Green Monster, then 240 on the newly-built right field roof deck, plus additional standing room in each of those sections.
This off-season, they've blown out and reconfigured much of the seating structure behind and above home plate, adding 2500 premium and luxury seats. The whole ballpark is a MUCH more accommodating place than it was when ownership changed hands four years ago.
I recently ran across an EXCELLENT series of videos of a presentation given by Janet Marie Smith, the Red Sox' architect in residence. I think she's brilliant, and her presentation is fascinating for those of us interested in Fenway's recent history, and its future. They're in the section titled The Past and Future of Fenway Park. (Peter Gammons shows up, too.)