The paper discusses the subject of intersectoral cooperation in sustainable development projects in order to identify social value created by the cooperating partners. There were several questions posed to find out what kind of social value is created in sustainable development projects undertaken by stakeholders from different sectors, and what is the role of such intersectoral cooperation in the process of creating social value. The empirical part of the work presents case studies from selected projects. As the results demonstrate, the use of mutual potentials allows for a more effective creation and use of value by a wider circle of stakeholders. A higher quality of services is achieved and, what is more, a wider range of social value is created. Social value in the local cooperation model is universal in terms of implementation, creation and use for various crosssectoral sustainable development projects.