Park designers settle on new concept for Copley Square A $15.5 million upgrade would accommodate big events while also making it a better neighborhood park with more greenery By Jon Chesto Globe Staff,Updated April 29, 2021, 3:05 p.m. Email to a Friend A rendering of what the City of Boston has settled on for a Copley Square redesign.Sasaki The final design for what will be Copley Squareâs biggest face lift since the 1980s is aimed at balancing the demands placed on the much-used, two-acre park in the heart of the Back Bay. One of the biggest changes on tap: The existing brick plaza area and the main lawn will essentially trade places. The switch means more grass by Trinity Church and a âflexible hardscapeâ along the Dartmouth Street side. The hope is to better accommodate concerts and other events, particularly those that could be staged across Dartmouth Street on the steps of the Boston Public Libraryâs McKim Building if the street is temporarily closed to vehicles for such events.