Green Architecture Techniques such as green roof and façade greening have been recently increasing in many cities.It brings many benefits to people in urban area such as mitigating an urban heat island effect, increasing the amenity of the cities and relaxation and conservation of biodiversity, and other benefits. Because of a lack of tools for quantifying the value, Green Architecture Techniques have not been well recognized by decision makers such as building owners of private sector. This study therefore aims at finding out this tool by doing various researches.First, we made a questionnaire by using Contingent Valuation Method, in which examinees are given several photographs of different scale of Green Architecture Techniques. The examinees will consequently understand that the effect of Green Architecture Techniques is proportional to the scale of greening. Next, these examinees are divided into several groups and receive different information about Green Architecture Techniques. One group receives only positive information while next group receives only negative information. We also give other group typical information of the effects. As the result, it was proved that the valuations of each examinee were subjectively influenced by types of given information.
