This paper present an initial analysis about the valuation system usually applied in Spain for retail properties. We explain the methodology for valuations which is regulated when it is done for mortgages purposes. We analyse a data-base including close than 900 observation of valuations of five different Spanish cities including Madrid, Barcelona, Valencia, Murcia and Alicante belonging to the same number of transactions, from 1998 to 2003. We can explain how the company use to value and also our estimation about the importance of the properties' features on the final value.