The original website for this house by Architekt Kuczia is not in english, so here’s a quick synopsis of some of the details: "The construction costs of this simple house were low and the lifecycle costs will be reduced.  The built form is designed to optimize the absorbance of solar energy.  80% of the building envelope is directed towards the sun.  “Black box”, a three storey structure clad with dark fibre cement panels, is warmed by the sun and offers a view on the lake."  Notice the living roof?  Via WAN.