The Royal Nautic Club of San Sebastian was built in 1929 by the Spanish architetcs Aizpurua and Labayen and is considered one of the first "Modern Movement" buildings in Spain. The context of the commission were the fact of a Heritage building, some disconnected interventions during the years, the global economical crisis and abandoned bar and restaurant in its first floor to be restored. The bad conditions of the concrete structure forced the "cleaning" of the additions and facilities that during the years had disfigured the original architecture. Because of the nature of the commission and a very low budget, the complete restoration of the building was non- viable. The project had to base its criteria in the values of the original Club that were, mainly, in the ruins. So the consolidation of ruins became the priority of the intervention. At the same time, the project had to create a new architecture to hold the hostelry program without disturbing the reading of the original building. So these new functions were ordered in a removable wooden pavilion. The recovery of the original steel framing of the curved main window completed the partial restoration of the building.