House is based on flexible domestic spaces concept and especially is conceived on relationship from internal and external spaces. Patio is project core and from patio concept we think to the sliding system of transparent wall that allows to have one-two or three patios inside house. In this case nature has continuous communication with domestic space. In the middle of the house is placed swimming- pool that can be closed or open thanks to the sliding cover system. In the same way in the corners of the house are placed two rooms that can be two patio too. House is composed by three layer: basement, that contains sliding wall track system; cover, that contains sliding roof system and a while of sliding transparent glass panels. External walls are in concrete and for the entirely closed hause space we have placed four sliding wooden panels. All domestic spaces is flexible and sustainable : thanks to the patio system that allows to have always correct exposure and correct ventilation inside house.