The young couple that owned the building's top-floor apartment wanted "a place where they [could] hang out with their friends, organize parties etc. All of this had to be achieved on a tight budget." To save money, the architects used Iroko hardwood planks for all the furniture and surface coverings.
As the architects explain, "[the] surface of the floor folds and wraps the wall, the wall becomes a table or a bench, a bench becomes a bed or a planter etc."
The two freestanding benches/planters were fitted with casters so they could easily be moved across the deck. The edges of the roof deck are planted with trees.
For more information about the project, click here. You can also see some other examples of Chicago roof decks here, here, and here. Photos: franky antimisiaris, Found via Archinect