Large cities use so-called development plans for better urban planning. Generally speaking, a development plan is an informal planning instrument in Germany to sound out development potentials in a city or in a district and to outline the prospects for its future use. It is not legally binding and is not subject to any standardized procedure.
A high-rise plan is a special framework plan for high-rise developments. High-rise plan is only a short name for the high-rise development plan, which is also called the high-rise framework plan and high-rise guideline. The high-rise plan first appeared in Frankfurt around 1998. A revision of the previous high-rise framework plans is planned for 2021. Overview of such plans:
Even before 1998 there were development plans in Frankfurt in which reference was made to high-rise developments. However, these were not explicitly designed as a development plan on tall buildings for the entire city.