Rental Income Tax in Greece compared to Europe

Austria 22.97%
Belgium 8.11%
Bulgaria 10.00%
Croatia 10.00%
Cyprus 0.00%
Czech Rep. 5.57%
Denmark 1.87%
Estonia 20.00%
Finland 22.50%
France 10.00%
Germany 9.92%
Greece 22.00%
Hungary 13.50%
Iceland 10.00%
Ireland 10.05%
Italy 21.00%
Latvia 17.25%
Lithuania 1.96%
Luxembourg 49.00%
Malta 23.33%
Montenegro 5.40%
Netherlands 13.42%
North Macedonia 7.50%
Norway 22.00%
Poland 13.50%
Portugal 26.44%
Romania 10.00%
Slovak Rep. 19.00%
Slovenia 15.00%
Spain 19.00%
Sweden 0.00%
Switzerland 48.56%
Turkey 27.15%

Greece has an index of prices of new and existing dwellings both in Athens and in urban areas outside Athens, generated by the Bank of Greece. There seems to be no private house price data provider. The National Statistical Service of Greece also has economic data.