Some people say that the creatively designed workshop, with its curved sheet-metal skin, looks like an "outsize illegal structure" because of its uncanny similarity the unapproved additions that grace the roofs of buildings all over Taiwan, from the light steel frame to the corrugated plastic and metal roofing sheets, steel roller shutters, pinewood planks and plywood.
空間自有「出路」之所以被形容為「超大型違章建築」，因為這棟半弧形鐵皮屋的建築工廠，都是用台灣各處所見的便宜建材，如屋頂加蓋的輕鋼架、透明塑膠浪板、鋼浪板、鐵捲門等，以及松木、夾板為主要材料。