Position papers The following position papers have been accepted to the workshop: Oliver Bates, Vanessa Thomas, Adrian Friday, and Mike Hazas. Sustainability by design?: from micro-studies to macro-action. Janet Davis. Reframing persuasive technology for sustainability. Daniel Gooch and Gerd Kortuem. Creating sustainability through smart city projects. Justin Larner. Broadening collective networks for sustainability: can the open source guild be a solution? Christian Remy and Elaine M. Huang. Identifying promising objectives for a sustainable HCI pattern language. Marcos Alexandre Rose Silva, Rener Baffa da Silva, and Junia Anacleto. Co-authoring patterns to support design of systems to promote spread of sustainability. A.M. Tsaasan and Joshua Tanenbaum. Sustainable HCI and reflective practice: making space for sustainability in research design. Ake Walldius and Anette Andersson. Design patterns for user-driven workplace labelling.