Tax deductions on empty property
This doesn't sound very legal to me. Real estate losses cannot generally be deducted unless you have other real estate income. So the only case when this would work is when that person has bunch of other buildings that do produce income, and he reduces that income, for tax purposes, by deducting the expenses/depreciation/taxes for the buildings that do not. However, depreciation doesn't really reduce taxes, only defers them to the sale. As mhoran_psprep said - all the rest of the expenses will be minimal.