Stefan Eberstadt‘s Rucksack Haus (backpack house) is a sculpture but could also be a fully functional dwelling; the 2.50 m x 2.50 m x 3.60 m box, perforated with wraparound windows, skylights, and “floor-windows” can be suspended by cables from the façade of a residential building and taken along when the owners decide to move to a new home.

Electricity is tapped from the “host” house.

Images 1 and 2.
Via Tom Moody and eyebeam reBlog. Details in Europaconcorsi.

More parasite architecture: paraSITE, the Web House project.