Old Orchard Woods Condominiums, Skokie, Ill.
In part as a nod to an adjacent forest preserve, and in part to offset the urban heat island effect, the Old Orchard Woods complex makes liberal use of green roofs. Visible at multiple levels, the main green space on the fourth floor is accessible to residents and serves as a private 1.2-acre park. All of the green roofs use American Hydrotech assemblies the system on the higher levels has sedum, grasses, and herbs and requires no maintenance, whereas the system on the fourth floor needs to be regularly maintained and allows for trees and other plants that have deeper root networks.