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Recognising the importance of buildings for the energy transition

Germany’s ambitious targets in climate protection can only be achieved if the buildings also become substantially more energy-efficient and if they find their place in an integrated, digitised energy system. Currently, though, they are often

marginalised in public debate. Changing this is the task of Allianz für Gebäude-Energie-Effizienz (geea) – "Alliance for Building Energy Efficiency" Find out about its aims and actions taken to increase energy efficiency.

Statistics & facts

35 %
of energy consumption in Germany
is in the building sector.
By 2050
the building sector in Germany
should be largely climate neutral.
By 2020
the consumption of heat should be cut
by 20 percent
At l 2 %
is the necessary scale of annual refurbishments
in order to achieve the Federal Government targets.

Energy-efficient buildings: Urgent action, substantial potential

Energy policies

dena advocates the energy-efficient refurbishment of buildings as part of the Allianz für Gebäude-Energie-Effizienz (geea), Alliance for Building energy-efficiency.

The building sector accounts for almost 35 percent of final energy consumption in Germany. This also means: buildings nationwide must become significantly more energy-efficient if the targets of the energy transition are to be achieved. The Federal Government has stated that the building sector should be largely climate-neutral by 2050. This means that the rate of annual refurbishments needs to more than double from under one, to at least two percent – which represents a significant rise.

Buildings – an underestimated factor

So far, the importance of buildings has frequently been marginalised in the debate on energy transition. In order to change this situation and consistently advocate energy efficiency in the building sector, dena founded the Alliance for Building Energy Efficiency (geea).

A single voice in politics

For the first time, this a cross-sectoral alliance succeeded in bringing key stakeholders from industry, research, skilled trades, planning, commerce, energy supply and financing to the table in order to discuss issues of energy-efficiency and the energy-efficient refurbishment of buildings. In its policy papers, geea includes the main points of agreement reached between the important market representatives in the areas of property and energy. The alliance gives these actors a single voice in its close dealings with politicians and stakeholders.

Improved conditions for energy efficiency

geea holds that circumspect energy policies must seek to improve the conditions for energy efficiency in buildings. After all, the success of the energy transition will depend significantly on the correct policy decisions in the individual energy sectors. This is why  geea submits clear policy recommendations in addition to its targeted activities to promote greater energy efficiency in the building sector.

geea believes that there is an urgent need to create a simple and standardised regulatory framework, to ensure sufficient compensatory funding and to develop additional innovative and effective market and communication tools. Exemplary projects include the geea-initiated campaign “The Building Transition” or the action group launched by the Federal Ministry for Economic Affairs and Energy “Germany does it efficiently”.

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Projects on the topic


Der Gebäudebereich bietet enormes Potenzial zur Einsparung und effizienter Nutzung von Energie. Der dena-Gebäudereport gibt einen umfassenden Überblick zum energetischen Zustand von Gebäuden in Deutschland und fasst wichtige Informationen übersichtlich zusammen.


  • Erscheint seit 2012 jährlich
  • auf 200 Seiten die wichtigsten Daten zur Energieeffizienz in Gebäuden
  • Analysen, Prognosen, Szenarien grafisch aufbereitet; mit Kernaussagen erläutert
  • Themenbreite: von Wohn- und Nichtwohngebäuden bis  Eigentümer- und Mieterstrukturen  im  Kontext politischer, wirtschaftlicher und historischer Ereignisse
  • Project Information

geea – “Allianz für Gebäude-Energie-Effizienz” (Alliance for Building Energy Efficiency)

The Alliance for Building Energy Efficiency (Allianz für Gebäude-Energie-Effizienz, geea) is a cross-sector consortium of leading enterprises, associations and organisations in the field of energy efficiency in the construction industry.


  • Project start: 2011
  • Positions and dialogue to improve building energy efficiency
  • Publication of numerous publications, organisation of political events
  • Participation in various dialogue formats
  • 2021: 10-year anniversary
  • 2023: Almost 30 members

"The Building Transition" Refurbishment Campaign

“The Building Transition” is the first nationwide, cross-sectoral refurbishment campaign. The campaign provides owners of detached and semi-detached houses with detailed information on all aspects of energy-efficient modernisation, and helps them locate qualified energy experts.


  • Campaign start: 2014
  • Number of partners: 24
  • Number of sponsors: 2
  • Number of regional cooperation partners: 16
  • Regional information events for homeowners: approx. 330
  • media reports triggered by the campaign: approx. 1,600
  • social medial reach: roughly 800,000 persons