ACCUMULATION CONDITION OF YEARLY BASED BUILDONG STOCKS IN A CITY

The purpose of this research is to analyze how building stocks of different ages were accumulated in different districts in a city. I analyzed a fixed property tax roll of Hachioji city; this tax roll includes 134747 buildings in 182 districts. The results of my analysis are as follows:1) Most of the building stocks were built after 1945. Before 1979, the building stocks increased year year, and over 2500 buildings existed after 1980.2) The number of existing building stocks vary greatly on a yearly basis. Number of construction by year are related to increase and decrease of existing building stocks, and constructed building stocks disappear year by year by regular ratio.3) The 182 districts of Hachioji city are classified into 9 categories. The highest number of districts fall in the "Average 11-25 year old architecture stocks, 10-20 year standard deviation" category; these districts are distributed in the central area of the city. The second highest number of districts fall in the "Average 25-35 year old architecture stocks, 10-20 year standard deviation" category; these districts are also distributed in the central area of the city.