Özet:

In the stage of restructuring of Turkish real estate valuation system, firstly, a database should be created using correct, high quality and up-to-date data. However, these data should be in a format that can be used in the necessary statistical analysis and modeling studies. In this study, data and basic characteristics that should be used in real estate valuation activities have been determined and it has been presented a sample UML-based data model design for the creation of real estate characteristics databases. UML class diagrams created with Enterprise Architect program are used in model design. The complex relations and rules that cannot be represented by the model are also explained. Thus, a better understanding of the developed model has been achieved. Scope of work; a UML-based data model was designed by using the features such as importance, presence, source, accuracy and timeliness of the data that should be used in the appraisal stage related to the real estate types divided into five main groups as land, land, building, residence and workplace. The main components of this design are; information on land and cadastre, data received from the site, development information, real estate type details, environment and location characteristics, precedent sales, building and residential properties, economic and demographic characteristics and information packages. The standardization of non-numeric data in these information packages should be ensured and interpreted as a model data-needs analysis. In order to ensure the smooth functioning of the model, the legislative infrastructure and institutional structuring in the field of real estate appraisal should be established in accordance with our country.

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