The project consists of the rehabilitation of a one family house and its outdoor space located in the beautiful residential area ofBellaterra, in Cerdanyola del Vallès; closed to Barcelona and in the surroundings of the Collserola natural park.The owners, a family passionate about light and spacious interiors, bought the property because of its fantastic views, but knew fromthe beginning, they needed a radical rehabilitation that would transform the house and its outdoors.The original property, located in a plot with a strong slope, consisted of a 442 m2 house divided in two floors and an undergroundlevel. Both the garden and the house were showing considerable problems that had to be solved. On the one hand, the house had avery irregular and angular brick work volume, with porches and windows in many different sizes and sometimes poor exteriorconnections. On the other hand, the outdoor spaces were badly designed, with a back garden which was in a much lower level thanthe house and it ended in such a strong slope that was very difficult to use or enjoy. Finally, the inner distribution was narrow anddark, with many different too small rooms and long corridors.First of all, the proposal aims to unify the exterior aspect of the house. To achieve this, the dimensions of the existing porches andwindows were adjusted; and some new windows were opened to allow daylight to flood in.On the north side, the front façade, which was almost blind and had a narrow and useless porch, required a more radicalintervention. For that, the porch was eliminated and the façade level was moved forward occupying the porch space and making theliving room bigger. A large 13 meters Niangon wood window appears in its place, integrating the access door and connecting theliving room with the front garden.On the back garden, a series of terraces were created as an extension of the house, to soften the slope of the plot and make all thegardens usable. The first terrace is situated at the house ground level, covered with bushhammered Sabbia natural stone andpartially cantilevered over an Ipe wooden terrace and an infinity pool. A wooden stairway leads down to the terraced garden, closedto the Sabbia stone wall of the pool.Regarding the interior distribution, the proposal chose to empty the house interior and offer a new contemporary functionalprogram; creating large spaces formed by different interconnected ambients, with large central vestibules for access and verticalcommunication which join the spaces on both sides without using corridors.The ground floor is formed by a large living room with a dining area, subtly separated by a big Sabbia natural stone fireplace, and akitchen at the back. The living room opens up toward the back terrace through large sliding glass doors that can be fully hiddeninside the façade, and also toward the front garden through the large wooden window. The result is a very luminous inner space withmany visual connections to the outdoor space. In that same floor, on the other side of the entrance vestibule, there is a more privatecontinuous space formed by a family room, an office and a music room that can be separated from the rest by two large slidingdoors.The upper floor is formed by the different dormitories, separated by the central vestibule which is used a children leisure room. Themaster dormitory is composed by a closet, a working desk integrated in the bedroom, a bathroom and an own terrace.In the interior, the pavements are covered with natural Sahel polished limestone, which reflects the light increasing its intensity; thewalls are painted in ivory white color; and the built-in furniture are finished in ivory white satin lacquer or natural tropical Etimoewood, showing an elegant orange grain that bring a look of natural warmth in contrast with the white and glossy surfaces