Planning law is typically only addressed as an annex in standard textbooks on construction law and is rarely, if ever, explored in its full richness. However, spatial planning is particularly central not only for legal scholars but also for students of architecture, urban planning, and engineering at technical universities and colleges, as it is crucial for understanding their respective fields. The textbook on planning law presents the entire diversity of this legal area not just from a legal dogmatic perspective but also in a practical and application-oriented manner, featuring many maps and diagrams. Small case studies facilitate understanding, and review and deepening questions assist in recapitulation.