What if the next generation of public furniture does not begin with a material order, but with a demolition site? Across Stockholm and London, designers are exploring a more resourceful approach to urban design, treating construction leftovers, discarded infrastructure, and garden waste as starting points for innovation. The result is not simply furniture made from recycled materials. These projects reveal how constraints can generate distinctive forms, preserve traces of place, and turn material reuse into a visible part of public life.