In the delta, every square meter is now spoken for, to store water, generate energy, produce food or live. How do we reconcile those claims knowing that the population and (therefore) the tasks will only grow? The Great Transformation challenges everyone, but also the spatial practice, to reposition itself in the triangulation between market, public government and civil society. The role of spatial design and planning is to facilitate change to “land” in our shared territory: through new projects, new coalitions and new platforms that embrace complexity. The Great Transformation is a call for reflection, but especially for cooperation. In Flanders and the Netherlands, 2% of the built space is re-built annually. Let's direct this incremental transformation through a multitude of small things, to materialize the next big thing.