Rental Yields in Greece compared to Europe

Ireland, Dublin 7.33%
Turkey, Istanbul 6.63%
Latvia, Riga 6.46%
Romania, Bucharest 6.36%
Montenegro, Podgorica 5.7%
Portugal, Lisbon 5.65%
United Kingdom, London 5.59%
Belgium, Brussels 5.54%
Poland, Warsaw 5.51%
Lithuania, Vilnius 5.47%
North Macedonia, Skopje 5.37%
Spain, Madrid 5.3%
Greece, Athens 5.25%
Hungary, Budapest 5.12%
Italy, Milan 5.04%
Cyprus, Nicosia 5.03%
Croatia, Zagreb 4.89%
Netherlands, Amsterdam 4.8%
France, Paris 4.72%
Estonia, Tallinn 4.67%
Sweden, Stockholm 4.53%
Slovenia, Ljubljana 4.45%
Denmark, Copenhagen 4.19%
Slovak Republic, Bratislava 4.11%
Czech Republic, Prague 4.05%
Bulgaria, Sofia 4.04%
Germany, Berlin 3.83%
Finland, Helsinki 3.8%
Malta, Valletta 3.67%
Austria, Vienna 3.64%
Switzerland, Zurich 2.79%
Luxembourg, Luxembourg 2.71%
Norway, Oslo 2.46%

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.