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. 15.00%
Denmark 52.07%
Estonia 20.00%
Finland 30.00%
France 48.00%
Germany 9.92%
Greece 22.00%
Hungary 15.00%
Iceland 22.00%
Ireland 10.05%
Italy 21.00%
Latvia 10.00%
Lithuania 15.00%
Luxembourg 49.00%
Malta 35.00%
Montenegro 15.00%
Netherlands 13.42%
North Macedonia 10.00%
Norway 22.00%
Poland 8.50%
Portugal 28.00%
Romania 10.00%
Slovak Rep. 19.00%
Slovenia 15.00%
Spain 19.00%
Sweden 20.00%
Switzerland 60.00%
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.