This paper describes part of a new programme of research into the performance of pervious pavement structures in Spain. The project is collaboration between University of Cantabria and Coventry University and it tries to introduce the use of pervious surfaces in Spain at the same time as innovating these techniques. An experimental study of the structural and hydraulic effectiveness and suitability of different materials for the pervious surface (concrete blocks, porous asphalt and porous concrete) and the sub-base (limestone, recycled concrete and mixes with recycled plastic) is being carried out considering their ability to support the microbiological communities for the biodegradation, including the study of geotextiles and their ability to retain humidity during dry periods. This research is taking place under weather conditions corresponding to the North of Spain, an area with excellent potential for introduction of all kinds of SUDS. Work is being carried out in the laboratory and at field sites in Gijon and Santander. The paper presents initial results on the hydraulic performance of two different concrete blocks and their clogging tendency under differing conditions of slope, silt and rain. These lead to initial conclusions on design, lifespan and maintenance needs.