This issue features Arup and sustainable buildings. With more than 90 offices in over 30 countries, Arup is one of the world’s leading professional services firms. It is known as a pioneer in environmental engineering as well as in structural engineering. Arup is not only well versed in assessment methods, but also developed its own methodology for the realization of sustainability. Arup’s ‘Designing Sustainable Buildings’ strategy has six objectives, involving carbon, water, materials, climate change, community and the environment and operations. These six objectives are provided to the client and shared with the design team on every project. This issue introduces about 30 works as case studies categorized by building type. Most have been completed over the last 10 years.