COMSA also designs and builds engine sheds and rail and tram workshops which include auxiliary services such as cleaning, shift handover and storage units.

COMSA also builds rail sidings for the national railways administration and for major industrial corporations such as Torras, Basf, Endesa, Repsol Butano, GEC Alsthom, Ford España, Seat Volkswagen, FIAT, etc.

see list of works