You must first check whether there are grounds for appealing against the tax value for the 2014 income year. If the tax value of the property exceeds 30 percent (primary dwelling) or 84 percent (secondary dwelling) of the market value, you can have the value reduced. You must appeal against the tax value for the 2015 income year in order for it to be taken into consideration for the property tax for 2017.
If your appeal is successful, the municipal authority will be able to download a new property value from the Tax Administration and update the calculation of your property tax.
You must contact the municipal authority yourself in order to have the new property tax based on the revised property value/capital basis after your appeal has been accepted.