The Waste House is a sustainable construction project installed at the UK's University of Brighton. As its name suggests, the prototype home is builtalmost exclusively from discarded waste.

Around 90 percent of the materials that went into making the Waste House derive from household and construction waste, including 20,000 toothbrushes, 4,000 DVD cases, 2,000 floppy discs, and 2,000 used carpet tiles, used to clad the home's facade. While nobody actually lives in it at present, the building is a remarkable achievement and proves the organizer's mantra that "there is no such thing as waste, just stuff in the wrong place."

source: http://www.gizmag.com/gizmag-top-10-sustainable-innovative-green-houses/34712/