This book presents the counts of the components of change in the housing inventory from the base year of 1980 to the current year of 1991. The data are based on a sample of housing units interviewed for the Decennial Census of Population and Housing in the base year and units interviewed for the American Housing Survey (AHS) in the current year. The Components of Inventory Change (CINCH) Survey was conducted as a supplement to the AHS, which was sponsored by U. S. Department of Housing and Urban Development (HUD) and conducted by the U. S. Bureau of the Census. The components of change in the inventory consist of additions to the inventory from ‘‘New construction,’’ ‘‘Conversions,’’ and additions from ‘‘Other sources;’’ losses from the inventory as a result of ‘‘Mergers,’’ ‘‘Demolition or disaster’’ losses, and losses from ‘‘Other means’’, as well as housing units that were the ‘‘Same’’ in number in 1980 as they were in 1991. For example, ‘‘Same’’ means there was one housing unit there in 1980 and one housing unit there in 1991. This book presents data on a variety of characteristics, including type of structure; occupancy status; age, sex, and race of householders; income; housing and neighborhood quality; housing costs; equipment and fuels; size of the housing units; and many other items.