“Renewing a New City” is the vision of citizen initiative HS2020, established in the ongoing brownfield development of Hammarby Sjöstad, Stockholm. Previous research indicates that there is a potential to further develop the Sjöstad, contributing to urban sustainable development. The Sjöstad is internationally renowned for its environmental profile and refurbishment lies in the far future. Therefore, this is of great general interest, although HS2020 in itself is totally unique.

This paper presents a futures study exploring how HS2020 could work also with Collaborative Consumption, i.e. the residents’ sharing of goods, services, and space instead of owning it. It uses elements of explorative and normative scenario approaches to create future images of Hammarby Sjöstad in 2020. The images incorporate Collaborative Consumption in six established HS2020 sub-projects, on e.g. Energy Efficiency in Buildings, Interactive ICT, Recycling and Electric Vehicles. The images were generated through workshops with participants from the citizen initiative, with inputs from a literature review.

In the HS2020 projects, sharing could take the form of Collaborative Lifestyles, Redistribution Markets or Product Service Systems. It could be open for anyone, restricted to members, or to residents within a building. These different groups could also initiate, own and maintain the sharing solution. Other potential actors are private companies, the municipality and non-profit organizations. Qualitative assessment indicates that Collaborative Consumption in the Sjöstad projects could reduce energy use and other environmental impacts. It could also help building local community, but realisation in itself also calls for elements of community and trust among participants.