Taalman Koch Architects have created a prefab home package called the itHouse.
From Taalman Koch:
The itHouse is a design system developed by Taalman Koch that utilizes a series of components prefabricated off-site in order to better control the construction waste, labor, and quality of the finished product. Conceived as a small house with glass walls and open floor plan, the itHouse maximizes the relationship of the occupant to the surrounding landscape while minimizing the impact to delicate site conditions.
Energy efficiency is achieved in the itHouse through passive heating and cooling, utilizing site orientation and cross ventilation, radiant floor heating, hi-efficacy appliances & equipment and the use of solar photovoltaic & thermal panels.