most of those are condemnable but haven't been condemned because the cities lose money on the taxes if they do, the other "vacant" homes are summer homes, homes recently on the market, recently off the market, under rrepair, foreclosed, owned by someone placed in retirement homes that haven't transferred title yet etc. it's not like there's millions of ready to go homes. there is more unusable/unused commercial space than residential. the best move would be to increase taxes on unoccupied homes, monthly, to force sales.
United States