In planning discourse, the relationship between knowledge and power is questioned with an increasing frequency. Planners understand that each actor or a group of actors possess specific knowledge, which modifies due to its interactions with other actors’ knowledge. At the same time, planners are aware that “knowledge is power”, it means that actors use their knowledge to push through their own desires. The core question discussed here is: How do diverse actors involved in planning perceive the relation of their own and others’ knowledge to power? This question is fundamental to understand when knowledge is a tool to create commonly acceptable plan and when it becomes a tool of power. We aim to discuss methods in which the above question might be explored, and what limits would such investigation have.