The real estate market in Greece is stagnant for several years due to the economic crisis and prices have dropped significantly. In this paper the housing market in the Greater Athens region is analyzed employing data for the supply of dwellings as well as socioeconomic data for the municipalities in the study region. Asking prices before the economic crisis are compared to the prices in subsequent time periods, when the real estate market has already declined. The sample is derived by the total housing supply for certain time periods and includes several thousand dwellings for sale available by online real estate agencies. At first, the geographical distribution of property prices is presented and it is associated to the attributes of the houses. The change in prices for different time periods is examined across municipalities and significant differences are observed. Secondly, several factors influencing housing prices are examined. Population characteristics of the municipalities in the Greater Athens region, such as education attainment, sector of economic activity, occupational status and unemployment are correlated with housing prices. It appears that higher prices are observed in municipalities with the most favorable characteristics. On the other hand, the impact of location on housing prices is approximated by the values of zones which are used for property tax purposes; in that respect, there is a significant correlation between the mean tax values and the mean of asking prices across the municipalities in the Greater Athens region. Finally several explanatory factors are tested to create a regression model in order to predict housing prices for the municipalities of the Greater Athens region. Both OLS and spatial regression models are tested and their results are compared.