As part of the Housing Assistance Supply Experiment (HASE), the first (baseline) survey of neighborhoods was conducted in Brown County, Wisconsin (Site I of the experiment), from November 1973 through April 1974. The survey had two parts--neighborhood facts compiled from local sources (NLS) and observation of street segments (NSOB). Each had its own instrument and produced a separate data file. This codebook describes a set of variables derived from the original survey variables. For each derived variable, the codebook details the construction, specifies all permissible responses, and provides a tabulation of the responses recorded in the final master files of survey records, 108 for the NLS and 8,084 for the NSOB.