The owners were looking for a place next the sea where to build their dream: a waterfront home; while visiting the current site, they fell in love with the location, the view, the natural environment and they chose it. The project aimed to realize their dream in the loved site. The idea is an outward projected house in which the sensation of living in full nature ,with feet in the water, was the goal . The central element of the project is the pool perimeter around the house ,which gives the impression that it is floating on water. To fulfill the customers’ wishes to realize a sustainable house, the swimming pool was designed as a biotope environment, with a vertical flow with hydrophytes free water system. The structure was made only with environmental friendly materials, selected from the cutting edge technology and passive house principles have been applied to the project ,to reach an average annual energy consumption less than 40KWH.