Concrete Waterfall House pushes the boundaries of local building laws.

   This concrete coastal Swedish house pushes the limits of the country's new building regulations, which allow anyone to build a four-meter-high building with a maximum area of 25 square meters on any existing residential lot without permission. Gothenburg-based Bornstein Lyckefors Arkitekter designed a prototype of one such structure, dubbed Attefallshus, that's just the right size but still takes full advantage of the ocean views.

   The building, was conceived as a concrete box with large windows and an overhanging canopy oriented toward the sea. According to the new law, half meter protrusion are not counted in the building area, which is why the architects created large bay windows which provide additional space for a loft bed, a sofa niche and the kitchen. The open-plan interior accommodates a lounge space, kitchen, dining area and study. The bathroom would be located in one of the corners, while the space above the desk can be used to build a bunk bed.

   The prototype house was designed for exhibition 25 Square at the Form/Design Center in Malmö and the architects are in the process of producing detailed drawings.