The project was carried out by architecture studio Satt Triple Balance. It is an office of 237 m2. CO2 emissions in the construction phase have been calculated through the ecômetro LCA® tool and a minimisation strategy was contemplated. The final carbon footprint of 66 tons of CO2 (278KgCO2eq/m2) was compensated through ECODES CeroCO2 program. In addition, low-impact materials (e.g. cellulose insulation, natural cork, FSC wood) were used and all energy consuming processes were electrified. Energy demand was 100% covered by renewable energy.