Owners of 900 North Michigan Avenue sought to enhance the attractiveness and functionality of this mixed-use building’s largest floor of office space. DMA had previously overseen a successful green roof installation on the building’s west side, an amenity for luxury condo owners. Our client asked us to manage the transformation of an east-side gray roof to a ninth-floor garden and patio for office tenants and oversee office space reconfiguration. Development of the 15,000 square-foot green roof also required lower level structural retrofits in the fully operational retail and hotel levels.

DMA managed this effort without disruption to the building’s other tenants, delivering a distinctive amenity for office users that improved marketability of the tower. We oversaw reinforcement work on lower floors and a design that ensured proper placement of heavier elements. Multi-level, stepped plantings include a variety of irrigated sedums, grasses, trees, and flowering perennials and provide a privacy screen for an accessible, 700-square-foot terrace. Tenants indoors enjoy an expansive green view, through updated curtain wall systems, and renovated common areas. 900 North Michigan Avenue now boasts almost an acre of green roof.