The project starts from two initial premises marked by the property from day one: - A house with lots of natural light - A house that has the ability over time to increase ceiling metres without giving up the common spaces. These two premises are what determine the main idea of the project: bring all rooms, and storage, to the partitions; leaving a central nucleus that articulates the space around it. This decision allows us to free up the street and patio façades, north and south respectively, and be able to work on them as a light and ventilation filter. On the other hand, it frees up the project section, giving it flexibility in time. Depending on the needs of the users, the roof area is increased through the construction of lofts. Anchors have been left integrated in the concrete structure so that in the future simple wooden structures can be assembled without the need for auxiliary means. On the ground floor, connected to the street and the patio, there is a garage space understood as a multifunctional space where you can have family lunches, parties or activities related to the patio. On the first floor, and going from south to north, there is the living-dining room and the kitchen. The room is connected to the living room through a double sliding door, this gives several alternatives for privacy, from a room completely open or semi-open to the living room to a closed room with access through the dressing room. On the roof, and thanks to the section, two terraces appear, one more private and protected by a vegetable pergola, and the other more exposed, understood as a solarium. The partitions are parallel but skewed with respect to the perpendicular of the façade. Taking advantage of the fact that they are blind elements, they are considered as service and storage spaces, recovering the perpendicular to the façade on its inner face. This gives the possibility of fitting a programme where it takes more thickness. The core that integrates the bathroom and stairs is slightly offset towards the north-west corner of the building's floor plan, thus defining different proportions in the spaces around it and facilitating the relationship between them. It also integrates a courtyard of light that, in addition to illuminating the central spaces of the house, provides natural light to the shower and toilet. This patio is designed as a preview for a possible elevator. The façades are understood as a triple skin. They are designed as filters to improve the feeling of comfort: light and temperature. The outermost skin is 4cm cellular polycarbonate, the inside is double glass with a camera and adjustable slats between the two. On the south façade, the space between the polycarbonate sheet and the glass can be opened and closed depending on the ventilation needs: in winter we close the chamber and orient the slats inwards to make the most of the radiation and in the summer we open the camera and orient the slats outwards thus avoiding the direct incidence of solar radiation; if it is suitable we can also open 100% of the inner leaf leaving the whole house ventilated from the south to the north façade. The house is designed to achieve the greatest possible comfort through passive methods. Only 3 mechanical air conditioning elements appear: a chimney with forced ventilation; a fan, duct and thermostat system that recirculates the hot air accumulated in the upper part of the double space taking it to the lower levels; and a heat pump that is used as additional support. We have worked with the neutral materials possible: concrete, glass, polycarbonate, maple wood... with the aim of generating an uncontaminated space and for the user to give it colour and personality through furniture, vegetation... somehow trying to project a support for everyday life.