In the central eastern sector of the site, many buildings have been discovered in survey, but only one has been excavated. It has been called the big storehouse, because of its size nad the materials found inside it. This is by far the largest structure in the village, 20m length and 8 rooms. Each room has been associated with a different activity but all of them have in common the use of the space to store. Some rooms were used as kitchens or pantries due to the fact of the large number of animal bones found inside, other room was used to store liquids (oil, wine or honey) in big containers or dolia and other rooms were used to store grain or cereal in pieces of pottery, on the other hand some spaces were empty because the were used to pass through out as corridors, courtyards or because the stored items were portable as weapons or clothing.
The building was destroyed by a burn, but it was reoccupied later. The number of found materials is very high and it makes el Castillon one of the most rewarding archaeological sites in Spain with more than 1.000 pieces per campaign.