Is this home new construction? If so, you may only be able to estimate the annual property taxes until after the sale. Property taxes are based on market value and, truly, until the home is sold, no one knows for certain WHAT the market value will be. The price of the home is almost always negotiable, but with new construction some of those negotiations may include upgrades and so on more than a significantly lower purchase price, still it is well worth a try. You cannot negotiate taxes, however. Those are set by the governing body and no discussions are permitted.