The Pacific Northwest knows sustainable design. From this stunning Portland contemporary built to LEED Platinum specifications (complete with 10-kilowatt rooftop solar array) to other, less flashy, more mobile digs, cities all over the region also known as Cascadia are raising the bar for eco-conscious solutions to housing questions. Now you can add this house, built by prefab company Greenfab and designed by Hybrid Architecture, to that illustrious list. According to Dwell, the house was constructed in a mere 29 hours, made of off-the-shelf components. Plucked from Greenfab's 1700 series, the three-bedroom, two-bath house is incredibly energy efficient, and includes a convection heating system and a hybrid heat pump water heater. According to its designers, the house is 51% more energy efficient than other new-build homes in the area. It's aiming for LEED Platinum specification.