Denbighshire looks set to be the next county to ask owners of second homes and properties which have been empty a long time to pay a council tax premium.
Wrexham, Flintshire and Powys already charge an extra 50%, with Anglesey and Ceredigion charging 25%, and Conwy and Gwynedd are yet to decide.
Denbighshire councillors will next week be recommended to follow the example of the first three and impose a 50% premium.
In Denbighshire there are believed to be 946 long-term empty homes, 502 of which have been vacant for more than 12 months but only 147 would be eligible for the extra charge. That would produce £99,480 in income.
There are 250 second homes in the county, of which only 73 would be eligible for the premium.