Greece's House price index (2007=100) shows a cumulative rise of 44.3 from 2001 thru 2007, and a cumulative drop of 49 from 2008 thru 2014 - http://sdw.ecb.europa.eu/quickview.do?SERIES_KEY=129.RPP.A.G...
As of February 2014, "Greece [had] suffered the second biggest property crash in the EU since the debt crisis began." - http://www.theguardian.com/world/2014/feb/28/home-ownership-...
From Q3'08 to Q2'14, Greek house prices declined by 41.6% in real terms - http://www.bankofgreece.gr/BogDocumentEn/PRODEXPO_Oct_2014.p...