In today's market situation, sustainability in the construction industry is of great importance, as the construction sector is responsible for 40% of global CO2 emissions. Particularly in times of rising interest rates, new business models are emerging in the real estate sector that take ESG criteria (environmental, social, governance) criteria. Many traditional project developers have failed in the current real estate and financial and financial crisis, which underlines the relevance of new approaches. A targeted management before, during and after the construction phase is necessary in order to develop existing properties ecologically, economically and process-oriented into sustainably profitable real estate. The aim of this work is to draw up a catalog of criteria for evaluating and classifying classification of existing properties, to what extent and with what effort opportunistic or value-added properties are suitable for a transformation into core properties are suitable. The work comprises a systematic literature review on the topics of real estate valuation, sustainability in real estate development (ESG) and risk management. Furthermore, criteria for the classification into risk classes were were presented and analyzed by compiling and evaluating relevant criteria from the literature. were compiled and evaluated. In addition, surveys and expert interviews with experts were conducted in order to identify and weight the criteria relevant for the classification and relevant criteria for the classification and evaluation of the risk classes. Finally a multi-criteria evaluation sheet was drawn up, which was used as an instrument for classifying risk classes of existing residential properties for experts on the basis of the criteria identified. criteria identified. The work thus makes a practical contribution to the sustainable development in the real estate sector and creates a basis for project project developers and investors who want to make both ecological and economic decisions in terms of sustainability.      «

In today's market situation, sustainability in the construction industry is of great importance, as the construction sector is responsible for 40% of global CO2 emissions. Particularly in times of rising interest rates, new business models are emerging in the real estate sector that take ESG criteria (environmental, social, governance) criteria. Many traditional project developers have failed in the current real estate and financial and financial crisis, which underlines the relevance...     »