Starting January 1, 2024 the environmental permit requires a new aspect in the application for an environmental permit: participation. The government requires transparency on the used methods and involved stakeholders herein, though specific guidelines are lacking. This research investigates on implementing these participation practices efficiently and effectively through a cross case analysis in tendered projects with a lessons learned approach. Findings indicate that participation can improve project outcomes, reduce objections from local citizens and bring forth innovation in a project. However, barriers include stakeholder management, involvement, attitudes between stakeholder groups and resource allocation. For effective implementation early involvement as early as the tender development is recommended, along with using different types of participation methods, emphasising formulating an official participation plan and clear communication & transparency.