Six cities (Barcelona, Istanbul, Velenje, Nuremberg, Vila Nova de Gaia, Eilat) offer suppliers €7.68 million to design, develop, and test an innovative Renovation Approach capable of generating Renovation Packages delivering 100% renewable energy supply (RES) to any existing non-residential building with adequate envelope quality. The Renovation Approach is to be tested through generating and implementing Renovation Packages for specific buildings in Buyers Group portfolios, the Demonstration Sites.