Despite continuous research efforts, the role of the European Union regarding spatial planning remains unclear. This article proposes to employ the concepts of soft spaces and soft planning to better comprehend how European spatial planning finds its way into the national planning systems. The EU contributes to the creation of soft spaces, differing from administrative entities, while at the same time, it acts as a driver of soft planning, focusing– both for strategic and legal reasons – on coordination, cooperation and mutual learning, rather than ‘hard’, regulatory planning. The article claims further that instead of depicting the connections between the EU and its member states, research should pay increased attention to the encounter of European and domestic planning within a country. The scales, actors and instruments that deal with EU inputs within a country might prove to be crucial factors that ultimately determine the impact of EU policies on spatial planning. To illustrate the encounter of European and domestic planning in the light of soft and hard planning, the article introduces a conceptual framework and thereby provides an outline for further empirical research.