The Jean Piaget redevelopment project will be the first in Sabadell to satisfy NZEB and Verde criteria, with the aim of decarbonising, promoting citizen empowerment and prioritising a circular economy through reuse and local production. A school, abandoned since 1931, will be transformed into a public facility, thereby improving its use and energy performance. The decision to renovate rather than re-build permeates the entire project. The existing structure and walls will be retained thereby reducing concrete consumption. Demolition material will be used in the foundations. On-site recycling of woodwork, stone materials and radiators will be undertaken, as well as rainwater harvesting. The insulation and façade materials will be recyclable, from renewable and local sources.