The variety of construction measures on and in existing buildings is reflected in the diverse terminology used when dealing with existing structures. Engaging with planning and building in existing contexts, from the conceptual phase to the design, involves not only addressing general problem-solving strategies but also considering how to methodically break down the specific tasks into individual work steps. The performance phases of the fee regulations provide a framework for this structuring. The Swiss impulse program for renewal (IP Bau) lays the foundation for a theoretical approach and practical engagement with planning in existing contexts. Working with this method is represented in a database-based IT application.