In Detroit’s Core City neighborhood, a prefab Quonset hut hosts six apartments and two live/work spaces surrounded by an urban forest planted with 150 trees. Named Caterpillar after its long and slender shape, the 9,000-square-foot, commercial-grade steel structure is the result of a collaboration between local developer Prince Concepts, architect Ishtiaq Rafiuddin of UNDECORATED, Studio Detroit, and landscape architect Julie Bargmann of D.I.R.T. Studio.