This paper presents a method of approximate estimates of multiple dwelling house at the outline proposal stage. The approximate estimates are required to be carried out more quickly and more precisely. It proposes the method which can define the volume of construction works within reasonable error by using multivariate analysis such as multiple regression analysis and cluster analysis. In this method it makes another proposal that if necessary we can point out the part of the model to revise by setting the limit of error logically. Conclusions are drawn as to the relevance of the application of the model to multiple dwelling house.