Jon Salerno has a neat idea for a little home. It's built to be fitted with a car which becomes an additional room when it's parked underneath:
the fundamental structures of 'habitat' are a 100-square-foot cubic pod and a 32-square foot electrical vehicle, usable separately (as a microhome and car) or together, to create a 132-square-foot multi-level living space. the vehicle's four chairs are reconfigurable: arranged in a normal forward position for driving,but rotatable to face one another to create a small living room when the car is docked to the home.
utilizing solar and wind energy, the two structures each store and feed energy to one another, with adjustable solar panels lining the roof of the living structure.
Link -via DVICE