For non-EU citizens, a Residence Permit is granted with a purchase of a property in Greece with a minimum value of 250,000 Euros! This Residence Permit is also a Schengen Visa and offers you and your family access to all 27 EU member countries as well as to Switzerland.
Therefore a Residence Permit for five (5) years is issued to non-EU Nationals, if he/she has obtained an entry visa first (if required), and legally owns a property in Greece with minimum that value. The residence permit can be renewed (every time for a 5-year duration), if the property remains unchanged in its legal ownership status.
The period of residence, under these specific conditions, is not taken into account in cases of granting citizenship to said residents and do not allow a right to employment of any type.