Silverbrick Buys Historic Office Building in Massachusetts Completed in 1897, the nine-story building is considered Worcester’s first high-rise. Dec112020 Image courtesy of JLL Capital Markets The Silverbrick Group has acquired 340 Main St., a nine-story office building in central Worcester, Mass. The Commerce Associates sold the 333,302-square-foot asset in a $14.5 million deal brokered by JLL Capital Markets. The seller let go of the historic building following an ownership that stretched over more than half a century, CommercialEdge data shows. Silverbrick is planning to ...