The purpose of this study is to clarify the factors that constitute the impressions concerning buildings and streets and to evaluate the relationship between the impressions and stages of simplification of the facades by means of colors and so on. Two series of experiments were conducted using the semantic differential method. The results are summarized as follows. 1) As for the simplifications of the buildings, three factors, naturalness and monotony, dignify, were extracted and the values of each factors change along with the stages of simplification. 2) As for the simplifications of the streets, four factors, harmony, vividness, monotony and naturalness, were extracted and the values of each factors change along with the stages of simplification.
