Now it is time to move forward with the concrete implementation of the agreed-upon measures to achieve the goal of “climate neutrality” in Mainz by 2035, if possible. In the run-up to the decision, Mainz residents had the opportunity to submit comments and feedback on the draft from March 2 through April 1, 2026. This feedback helped to further develop and improve the Mainz Heating Plan. An overview of how the feedback was incorporated into the Heating Plan is available to all interested parties at www.mainz.de/waermeplanung (opens in a new tab).

A key outcome of the KWP is the division of Mainz’s urban area into four priority zones. A distinction is made between district heating areas—which are often densely built-up and have a comparatively high demand for thermal energy—and areas with individual heating systems, where single-family or two-family homes are often found in more sparsely built-up areas. The additional prioritization of these priority areas indicates the likelihood of implementing this type of heat supply in the respective area. 

In the next step, in-depth studies will be conducted in five selected focus areas—for example, in Drais or Laubenheim. These studies will examine how implementation in the priority areas can be successfully achieved, thereby yielding insights that can be applied to other city districts. In addition, the KWP outlines a total of 27 measures that identify the areas of action along which heat supply can be further developed in the future. The state capital is collaborating on this with Mainz Public Utilities, the skilled trades, the housing sector, and residents.

The final heating plan—including the action plans and neighborhood profiles, the priority areas, the maps, and the evaluation of public participation—is available for download at www.mainz.de/waermeplanung. In addition, under the heading “Your Questions, Our Answers,” we have addressed and answered the most frequently asked questions (FAQs) from the citizens’ forum and the public participation phase regarding binding commitments, mandatory connection, heating system replacement, subsidies, and the new Building Modernization Act.