SOMERVILLE, MASS. — South Carolina-based developer Greystar is underway on vertical construction of 74 Middlesex Avenue, a 465,000-square-foot life sciences project in Somerville, a northern suburb of Boston. The site is located within the Assembly Square mixed-use district. Designed by Elkus Manfredi Architects, the transit-oriented, 15-story building will feature ground-floor retail space, a health and wellness center, conference rooms and a 2,000-square-foot rooftop deck. Completion is scheduled for spring 2024. The project marks Greystar’s initial foray into the life sciences sector.