Policy measure for achieving a zero-carbon building stock by 2045


Bundesamt für Bauwesen und Raumordnung (BBSR)

Duration February 2022 – May 2024


With the amendment of the Climate Protection Act in 2021, climate protection targets for the individual sectors for the year 2030 have been tightened once again. GHG emissions in the building sector are thus to be reduced to 67 million tonnes CO2eq, which means a reduction of 53 million tonnes or 44 percent compared to the reporting year 2020. Climate neutrality is to be achieved for all sectors by 2045.


The aim of this project is to develop policy instruments and to quantify their impacts applying a simulation model. Thereby, the perspective of individual actors is taken into account.  In addition to the building owners, who already represent different target groups considering individual barriers and decision-making calculations, relevant stakeholders include tenants, who are more and less burdened depending on the design of certain policy instruments. In addition, energy industry actors are relevant, especially in the field of central heat supply via district heating. Intermediaries such as installers and tradesmen are another group of stakeholders that have hardly been addressed by policies so far. Overall, three different policy packages are developed and evaluated with which the goal to achieve climate neutrality in the building sector by 2045 can be achieved. The effect of the policy packages will be quantified by applying the simulation model Invert/ee-lab and successively adjusted in an iterative process until the goal is achieved.

Tasks of IREES

  • Project management

  • Elaboration of measure packages

  • Simulation-based quantification of the instrument effects

Project partner

  • Öko-Institut

  • Fraunhofer ISE


Jana Deurer
Jana Deurer
Dr. Jan Steinbach
Dr. Jan Steinbach