Technical Improvement Of Real Estate Valuation Market Comparison Method Based On Fuzzy Mathematics Applied Research

In the field of real estate valuation in China,the market comparison method is favored by practitioners because its calculation process is relatively concise and clear,and the valuation results are more relevant to the prices in the market.However,there are also some obvious shortcomings in the market comparison method itself.After in-depth analysis of the advantages and disadvantages of the market comparison method and its technical route,it is found that the market comparison method has limitations in three aspects in the process of calculating the appraisal results when using residential houses as the appraisal objects in real estate appraisal,mainly including: the correction of factors affecting prices is too subjective;There are no quantitative criteria for selecting comparable examples;There is no basis for obtaining comparative value from weighted comparative prices.Based on the existing theories and methods of real estate valuation,this paper validates and analyzes the operability and effectiveness of improving the market comparison method based on fuzzy mathematics related theories,and takes the error as the basis for evaluating the improvement effect.Firstly,some unqualified transaction cases are eliminated through qualitative criteria,such as: the building area is too large or too small compared to the appraisal object,the building structure is different from the appraisal object,and the transaction date is more than one year from the value point;Secondly,determine the selected feature factors such as house type,orientation,floor,decoration,etc.,and propose new algorithms for determining the membership degree of these feature factors;Thirdly,using the operational rules in fuzzy mathematics theory to calculate the proximity degree,and using the proximity degree as a standard to determine comparable examples from transaction cases;Finally,the "exponential smoothing method" is used to calculate the comparative value by weighting,combining the proximity degree of the determined comparable examples,and organically linking the weight and proximity degree to obtain a more scientific evaluation result.In order to verify the scientificity of the above improvement methods,this article first takes a typical residential building in Yuanda Ideal City Residential District of Zhengzhou Economic Development Zone as an evaluation case to verify the operability of fuzzy mathematics in improving the market comparison method;Based on multiple valuation cases,the evaluation results of the improved market comparison method before and after the improvement are compared with the actual market transaction prices to verify the effectiveness of the improved market comparison method.At the end of the article,the conclusion of this study-the improvement of market comparison method in real estate valuation based on fuzzy mathematics is feasible and effective,and some problems and limitations of this research direction are pointed out.Based on this,the research direction in the field of real estate valuation is prospected.