This project in Madrid’s Carabanchel district creates an 85-square-meter unfinished space that the inhabitants can renovate on a limited budget, saving on construction costs. The bareness allows future interventions where expensive finishes are unnecessary. While maintaining the apartment’s original layout, up goes a wall clad in aluminum and equipped with technical systems, containing plumbing and electrical services besides storage space for the kitchen and bathroom. Structurally the flat presents a grid of beams and pillars. The continuous floor of reflecting epoxy resin strikes a contrast with the cavernous look of the plaster ceiling. The kitchen and the bathroom are clad in ceramic tiles. Red marble details stand out amid grayish tones.