抄録
This paper has done a chronological study according to the folk houses investigation of Tsukuba City. The purpose of this study is to clarify the date of every classification and the regional characteristics in Ibaraki Prefecture. As a result, the following facts were cleared; 1) In classification I-a, the building type is similar to the original form of whole Ibaraki Prefecture. 2) In classification I-b, regional characteristics belong to the wide area such as south and west parts of Ibaraki. 3) In Classification Il-a, the building type begins to show the independent regional characteristics of the western part.
