The aim of this study is to analyze the lifestyle of residents from the viewpoint of the global environment. Another aspect of the study is to clarify to what extent the residents are conscious of their house are well as their way of living in relation to lifestyle, which may be classified into three types: Type I that takes good care of assets and tries to live in harmony with nature, Type II that actively consumes material while still valuing the natural environment, Type III that is active in material consumption and prefers the artificial to the natural living environment. It is evident that the lifestyle of Type I is ideal for environmental symbiosis whereas that of Type III is in conflict with environmental symbiosis. From the standpoint of how much the residents are conscious of their living environment, there are a relatively large number of those who endeavor to cope with a changing family environment by changing their way of living rather than remodelling their house, but, on the whole, they remain a minority. As regards remodelling, a high percentage fall into Type I as evidenced by their social consciousness or sociality and long range planning such as in working out the value as well as durability of their asset and considering whether or not their house is compatible with the rest of the houses in their community. Neither the sociality nor long range planning was high in Type III. Generally speaking, used houses are not adequately evaluated. Such being the case, the owner of a remodelled house should learn the importance of getting the house properly assessed when remodelled and of maintaining the house performance thereafter. In other words, the residents should always be aware of the value of the asset they are in possession of.