For the alternative reuse and sustainability of existing buildings HDP Real Estate has a strong vision. Initiatives for alternative reuse of existing buildings must come from the market and the authorities will have to be flexible. Only this way we can provide a new life for valuable buildings. Sustainable retrofitting of existing buildings for HDP Real Estate stands for better comfort for the occupants, lower costs and increased value of the real estate. This involves not only a reduction in energy use, but also refers to the daily use and future value of the building.