The Department of European and International Relations is supported by the Erasmus Student Network ESN Kapa Athens in order to assist foreign students to find private accommodation.
You are advised to join their Accomodation Group on Facebook: https://www.facebook.com/groups/313962265301086/ and to visit their webpage for further information (http://www.esnkapa.org/accommodation-0).
Furthermore, you can use the platform: https://www.uniplaces.com/ or other online platforms.
Indicative prices for private accommodation range from 300-400 Euro. Usually, renters are asked to pay in advance a fixed amount (equivalent to the rent of two months) as a deposit, which will be returned to them upon their departure on the condition that no damage or unpaid bills are remaining.