Valley at Zuidas in Amsterdam is a sustainable mixed-use building with flats, office space, an underground carpark, a sky bar, shops, and cultural facilities. This smart building brings together the latest insights in the area of sustainability, technology and health. The building scores an energy performance coefficient of -0.30. The negative score means that over a year, the energy yield of the building exceeds its energy consumption. With the green patios and terraces, Valley is green in appearance and in use; it received the BREEAM Excellent rating. Bosman Bedrijven built the complete technical systems of this unusual and sustainable project.