(Updated Aug 30th) For Design Your Dwelling 2008. Just under 2500 sq ft. The shape of the house was designed around the view of the golden gate bridge, and the roof was designed to face directly south and tilted at a proper angle so that the nearly 5.5 kW of photo voltaic solar panels and solar water heater get the maximum amount of solar exposure. There are enough windows in every room so no lights will need to be turned on while the sun is up. The 2 rooms and bathroom under the solar panels have solid walls up to 9 ft then glass walls connecting to the ceiling to share light and give the rooms an open feel.