Sport stadiums around the world are not only used for the practice of sports, but also for shopping, concerts, museums, events and business meetings or conferences. The stadiums are multi-functional centers which attract a lot of people also when there is no event. Stadiums are getting larger and have more and more other functions, which increases the energy use and the environmental impact. Nowadays there are many possibilities to restrain the energy use with energy saving measures and renewable energy technologies. Shifting to a more sustainable sport stadium sector could have significant effects in the field of sustainable development. The aim of this research is to create a general marginal cost-supply curve of energy saving and supply potentials of available energy saving measures and renewable energy technologies for sport stadiums, depending on the characteristics of the stadium. A case study is done to determine the technical potential of five European stadiums.