The Ministry of Finance issued a circular providing guidance regarding the application of the provisions on the Energy Performance Certificate that is now required to be issued for all leased real property in Greece. 
According to Circular No. 1018/13-1-2012, the Energy Performance Certificate of any building larger than 50 square meters that is leased, wholly or partially, for the first time. The Certificate is required by the Tax Offices in order to proceed with the registration of the lease agreement. Any lease agreement that is taken to the tax office after the 9th of January 2012 must be accompanied by the Energy Certificate (if it is a new lease agreement and not the renewal of an existing one).  
The Certificate is issued by certified energy inspectors; a list of the certified inspectors is to be found at a special site of the Ministry of Environment, Energy and Climate Change at www.buildingcert.gr.

You can find the list of the VAT rates that apply in the EU Member States as in force on 1 January 2012 on the website of Taxation and Customs union Directorate of the European Commission.