This innovative storm water management system in the Voldsløkka project has been fully operative from August 2023. It will be used to demonstrate the effectiveness of such solutions and its technical limitations (durability of materials, growing rate and health of vegetation, effectiveness of stormwater outflows over time) in relation to the replicability potential in other geographical areas. The school’s green areas are organized and planned in two main groups with different designs, to facilitate natural protection of the vegetation, green areas at the plot edges, and green island in the middle. The central green areas were developed as islands surrounded by channels. These channels are the features that ensure an efficient stormwater management on the school grounds. The terrain around the channels is planned so that rainwater flows towards the islands. The channels are covered by metal grates below which rain beds are placed. On the rain beds, a flower meadow with Norwegian, wild, perennial meadow plants is placed. The stormwater is collected by the channels and redirected to the islands, where it is absorbed and led deeper down towards the crushed stone reservoir below. The system with islands-channels is designed in such a way to clearly show the water flows and the mechanism of storm water management employed in the school site.