Information is the key to mastering the challenges facing the economy, not least the real estate industry. The often cited responsibility of the real estate industry for 40% of the world’s CO2 emissions gives reason to think about reduction potentials on all political and economic levels – and how to achieve them. In any case, there is agreement that political decisions must be based on reliable information about the energy status of buildings.Real estate data, including data on the energy status of buildings, is available in large quantities. However, their use faces the following problems:
– Decentrality – Where can I find information?
– Originality – Is the information correct?
– Timeliness – Is the information up-to-date?
– Allocation – Who is entitled to the information?
– Accessibility – How do I get access to a piece of information?
– Transferability – How can I receive or pass on information?

Up to now, most solutions have been of a centralized nature, i.e., attempts have been made – and are still being made – to collect and analyze large amounts of data on central storage devices. Such centralized solutions are difficult to implement, time-consuming and expensive when it comes to solving the numerous and constantly changing requirements for information.

In this paper the Real Estate Group of the Bundesblock is drafting how the use of blockchain can help with this challegene.

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