Abstract
In 1975, we investigated detached houses and households in Hokkaido. We investigated again in 1984 the same detached houses and households that were the object of investigation in 1975. The purpose of this paper is to make clear a growth in household and renovation of a detached house in Hokkaido based on the results of these two investigations. We obtained the following results ; 1. a growth in household is regulated by the primary conditions, 2. most of the houses were renovated for about ten years, 3. there has been a large increase in floor space after the renovation, and so on.
