The previous target definition of a “nearly climate-neutral building stock” is defined by the Energy Efficiency Strategy for Buildings (ESG) with the target of 80 – 95 % reduction of the non-renewable primary energy demand (nEE-PE) for the period 2008 to 2050 and was examined in scenarios. Consistent with this is the sector target of the Climate Protection Plan 2050, which envisages a reduction of greenhouse gas emissions of 67 % by 2030 (compared to 1990).
In accordance to the EU target of climate neutrality, a new target definition for a climate-neutral building stock is also required, which is compatible with a reduction of 95 % of total greenhouse gas emissions compared to 1990. Assuming that the 95 % reduction target also applies to the building sector, a maximum residual amount of 14.5 million tonnes CO2eq is allowed.

Since residual emissions from non-energy related processes remain in other sectors such as agriculture, a target definition of a 100 % reduction of GHG emissions (compared to 1990) is assumed for the building sector in this project. It is therefore investigated how the building sector must develop in order to completely reduce energy-related GHG emissions compared to 1990.