Image courtesy of Robert A.M. Stern Architects and CBT Architects

Boston-based Bain & Co. is relocating to a new office building overlooking the Boston Public Garden reignited calls for changes in how Boston treats development projects that are delayed for extended periods.

Bain & Co. signed a 15-year lease for all eight floors of office space at 350 Boylston St., a 221,230-square-foot development by The Druker Co. of Boston.

The existing block of buildings, including the Arlington building and former Shreve, Crump & Low jewelers flagship store, was the subject of a failed preservation attempt in 2006. The Boston Landmarks Commission rejected a petition to grant the property historic protections.

“This one just breaks my heart,” Boston Chief of Housing Sheila Dillon, posting on a personal account, tweeted Monday. “Boston is losing one of its most beautiful, historic corners. Preservation is important. The process failed us.”

The Druker Co. received approval from the Boston Redevelopment Authority in 2008 to replace the four commercial structures with a new office building, but held off on starting the project while waiting to secure an anchor tenant.

The new building, designed by Robert A.M. Stern Architects and CBT Architects, features a gray limestone facade with a granite base and floor-to-ceiling windows, along with terraces on the top three floors. The building includes 15,000 square feet of retail and restaurant space and a three-story, 150-space underground garage.

After site work began at the property this spring, the Boston Preservation Alliance called on Mayor Michelle Wu to require new reviews of projects that have failed to break ground for an extended period, to reflect the same criteria applied to newly-submitted projects.

Bain & Co. did not return messages seeking comment on whether the lease represents an expansion or relocation.

The management consulting firm was the initial tenant of its existing headquarters at 131 Dartmouth St., which was developed in 2001.