How can I tell which American Housing Survey (AHS) years used a certain variable?

For 2013 and earlier access the AHS Variable Name Index. This index is a comma-delimited file that you can import into most spreadsheet, database, or statistical programs. It cross-tabulates all the variable names ever used in the AHS PUFs with the 1973-2013 survey years. For 2015 and later, use the AHS Codebook.