The article describes tensions generated in land-use planning practices in Norway, Finland and Sweden, due to the shift towards New Public Management in actual governance practices, while the ideals of deliberative democracy in planning discourses and legislation have been retained. These tensions are studied empirically by making comparative observations of planning systems and practices in each country. The theoretical approach is developed by combining democracy and legitimacy theories with double bind theory and organizational learning theory. Based on this theoretical work, the article offers insights for reflectivity on the tensions. The Nordic ideal of deliberative democracy, expressed in the primary aims of our planning laws, may prohibit open acknowledgement of the uneasiness which follows from the fact that liberal democratic values (rights of landownership, free enterprise, etc.) are also secured. Thereby planners act and speak in terms of mixed messages, potentially habituated into defensive routines that may prohibit metacommunication on the basic tensions. The idea of agonistic reflectivity is offered as an approach to planning, which would acknowledge the tension between input legitimacy and output efficiency as a legitimate condition in itself, requiring ongoing political debate where the tension has to be continually discussed without actually ever being resolved.