What specifically do the plaintiffs criticize about the new Heating Act?

According to the Left Party and their lawyer Johannes Franke, information is missing on climate impact, biogas availability, and the conditions of a "CO2 credit at the expense of future legislators" of an unknown amount.

What deadline does the Left Party aim to achieve with the urgent motion?

According to the applicants, the urgent motion is intended to prevent the Building Modernization Act from being adopted at least before the parliamentary summer break, so that information on climate impact can still be provided later.

Heating Act: Left Party halts Building Modernization Act

Q: Who filed the lawsuit against the Building Modernization Act?

The Left Party faction in the Bundestag filed the lawsuit and urgent motion at the Federal Constitutional Court, announced by climate policy spokesperson Violetta Bock.

Berlin, 03 July 2026

The Left Party faction in the Bundestag has filed a lawsuit and an urgent motion at the Federal Constitutional Court against the planned Building Modernization Act in order to prevent a vote before the parliamentary summer break.

The climate policy spokesperson of the Left faction, Violetta Bock, announced the lawsuit in Berlin. Bock stated that the federal government had not provided any information on the climate impact of the project or on the availability of biogas, even after repeated inquiries. In her exact words, she said: „Wir wollen, dass diese Berechnungen auf den Tisch kommen." At the same time, there are fears of a swift adoption through expedited procedure – „damit solle verhindert werden, dass das neue Gebäudemodernisierungsgesetz im Eilverfahren durchgepeitscht werde".

Left Party seeks to halt Building Modernization Act with urgent motion in Karlsruhe

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