A black box built from oriented strand board houses the kitchen and bathrooms of this converted barn home in Portugal, and also integrates a staircase leading to the mezzanine floor above (+ slideshow). More about Inês Brandão installs black box of rooms inside converted barn home
Concealed behind a historic facade, this narrow residence by Barcelona architect Josep Ferrando is wedged between the party walls of a pair of houses in the Spanish city of Sant Cugat. More about Josep Ferrando slots a skinny house between two existing properties in Spain
This glazed house built from thick concrete slabs was designed by Swiss architect Gian Salis to follow the slope of a plant-covered hill in Germany's Rhine Valley (+ slideshow). More about Gian Salis' House on a Slope steps down a hillside in the Rhine Valley