I've been a fan of Michelle Kaufmann's green designs for modular, prefabricated homes for quite a while now. Last Fall, her mkLotus house was displayed at West Coast Green, which I was lucky enough to attend. These houses are built to accommodate such green features as a graywater system, geothermal heating, and solar panels. The mkLotus is built using sustainable materials and energy-efficient technologies, including spray-in, open-cell foam insulation, structural-insulated panels, FSC-certified wood, an on-demand water heater, and double-pane low-e windows and glass doors.
To see a video tour of the MKLotus, just