A renovation of a ground floor house of the early XX century in Barcelona, partly renovated a few years ago, with ceilings that hide a great height. Although it was dark, its facades face to the street and the inner garden. The project partially disassemble the house and maintains structure and distribution: a new interior courtyard illuminates the ground floor and gives the kitchen some facade. We added a floor into the existing volume and dismantled part of the roof, pulling some facade back and making a terrace for bedrooms. We have used a dry construction system, with a new floor of wooden beams, OSB boards, wood fiber insulation and wooden floor. The new facade is isolated from the outside with wood fiberboard. We take characteristc preexistences: interior woodwork and old tiles.