LEXINGTON, Mass.--(BUSINESS WIRE)--Cubist Pharmaceuticals, Inc. (NASDAQ: CBST) today held its own version of a traditional groundbreaking ceremony with an event it called “Raising the Roof.” The ceremony marks the official beginning of a construction project that will add an additional 104,000 square feet of lab and associated administrative space to its already existing lab facility at 65 Hayden Avenue in Lexington. The project is expected to be completed by early 2012.