Input-Output Benefit Analysis of Green Building Incremental Cost Based on DEA-Entropy Weight Method

Green buildings are an important carrier for the transformation of the construction industry to green, efficient and energy-saving, and an important part of the national sustainable development strategy. At present, the development of green building in China is still in the primary stage, the willingness of construction enterprises to develop green building is low, and the promotion of green building is facing the problem of insufficient power. The main reason is that the incremental cost of green building is too high. Therefore, this paper takes green building as the research object, and studies the quantification and evaluation of its incremental cost-benefit. Firstly, the incremental cost composition of green buildings is analysed from the perspective of the whole life cycle, and the incremental benefits are divided into economic benefits, environmental benefits and social benefits. Secondly, the green building incremental cost-benefit evaluation model is constructed by combining the entropy weight method and the data envelopment analysis (DEA) method. Finally, the feasibility of this evaluation method is verified through the analysis of practical engineering cases. By evaluating the input-output benefits of incremental costs, the projects with DEA effectiveness and DEA ineffectiveness are identified, and specific suggestions are put forward for them respectively. The research results not only provide theoretical support for the quantification and evaluation of incremental costs and benefits of green buildings, but also provide a reference for the formulation of corresponding cost control measures, and lay a foundation for the realization of the cost minimization and benefit maximization of green buildings.