Banker & Tradesman | 9.6.22 Brickbottom Lab Project Gets First Tenant Ultragenyx will occupy 42,580 square feet at 100 Chestnut, a speculative 208,600-square-foot office-lab building that is scheduled for completion in mid-2023. Developer North River Leerink received a $192.5 million construction loan from Square Mile Capital in June for the project. (CLICK FOR MORE)