ACCENTRO Real Estate AG is the market leader in residential privatization in Germany. A large part of the customer base is made up of private investors who purchase real estate from ACCENTRO as an investment. Such investments are linked to important parameters. For example, properties are compared on the basis of location, market price, potential return and price development. Excel spreadsheets are often used for this purpose, but their maintenance and creation is laborious and error-prone. For this reason, there was a need for a more efficient software solution to this problem. A clear real estate comparison site for private investors was to be created. In cooperation with the agency Cheil, we put the requirements into an intuitive web application called “PropRate”.