House L, by Stephan Maria Lang, is an L-shaped residence in Munich designed for a young family. Protected from the street by a tall white wall, the energy efficient house is built with concrete core cooling/heating, sun collectors, thermal heat pump, and controlled air ventilation to meet the German standards of a low-energy house. Oiled natural oak and dark shell limestone, as well as white plastered walls dot the interior giving it a classic Bauhaus feel.