This file provides data on the characteristics of the financing of homeowner and rental properties, including characteristics of the mortgages, properties, and property owners. There are two files: a homeowner property file and a rental and vacant property file. There are two record types on each file: a property record (information provided by the property owner), and a mortgage record (information provided by the mortgage lender). The potential universe is about 66,000,000 properties securing about 38,000,000 mortgages, plus all mortgage lenders in the United States. About 70,000 properties were in this sample. This survey has been conducted as part of the 1950, 1960, 1970, 1980 and 1990 Censuses of Housing.