The Broad Institute, a biomedical research institution, plans to expand by 250,000 square feet at Cambridge Center in Kendall Square.

The Broad Institute will add a second building to its facility at 7 Cambridge Center, creating additional research and administrative space on an adjacent parcel at 75 Ames St., according to a statement. The addition will be connected to 7 Cambridge Center on six levels.

Construction of the expansion is scheduled to begin in the first quarter 2012 with The Broad Institute expected to take occupancy during the first quarter 2014.

"The Broad Institute required a thoughtful, deliberate approach to evaluating our real estate portfolio and determining the best course of action for expansion," said Alan Fein, executive vice president and deputy director of the Broad Institute. "McCall & Almy offered us a range of solutions and their input was invaluable in deciding to grow in Kendall Square."

"Finding a solution that enables the Broad Institute to grow its celebrated research capabilities is truly gratifying," said Lentz, executive vice president and principal of Boston-based McCall & Almy. "This expansion plan will provide the Broad with a world-class facility that can enhance their existing collaborative environment, a crucial element to the Broad’s success."

The Broad Institute was represented by Mary Lentz, Sandy Tierney and Sam Cole of McCall & Almy. Mike Cantalupa, Jeff Lowenberg and Rich Monopoli represented the owner of 75 Ames St., Boston Properties.