La seu (fins al 1990) d’aquest banc es va alçar a la perifèria d’una ciutat encara murallada, però amb un dinamisme terciari que ha perviscut fins ara. En procés d’obra el 2008, la transformació desestima els espais interiors i salva una façana d’un eclecticisme vibrant, en la qual el neogòtic delinea unes esveltes pautes verticals encastellades en què va encaixant els seus propis estilemes, alternats amb els d’un neoclàssic reduït al paper de simple comparsa lingüístic.

Al llarg de la seva carrera Masó projecta diverses oficines per a la Caixa de Pensions, fruit de la relació professional del seu germà Santiago amb aquesta entitat. La més interessant des d'un punt de vista arquitectònic és la de Sant Feliu de Guíxols. A la cantonada de la Rambla Vidal amb el carrer Major s'aixeca aquest edifici de planta baixa i pis, destinat a caixa d'estalvis en els baixos, i biblioteca a la planta pis. Les dues plantes estan clarament diferenciades en façana. La de baix, com a cos principal, destaca per la disposició de grans finestrals d'arcades protegides per reixes de ferro forjat. El pis presenta finestres rectangulars emmarcades per columnes de fust estriat.

The building is located on a plot of land between party walls, with the main façade facing Còrsega Street. It integrates a large building within the urban fabric of the Eixample. To achieve this, we have proposed three different types of façades that respond to different conditions of its immediate environment: the façade on Còrsega Street, the façade in the interior of the block and the façades of the hotel's courtyards. The façade is split into two floor plans, one of glass and the other one of ceramic. On the main façade, the openings are carried out with respect to the façade plan by means of brass boxes, creating a game of light and shadow that reduces the screen effect of the building, achieving a better proportion on a city scale. Following the same principle, the two large galleries recall the "skyline" of the old Bayer factory. At night these boxes are illuminated, achieving an effect that makes the boxes float on a black canvas. These mechanisms help to divide the longitudinal view of the façade, which occupies almost the entire block. On the ground floor, the double-height metal portico structure helps to build a foundation that seeks the view of the interior garden and gives presence to the building. The façade here is proposed in reverse, this time with the glass set back, reaching a depth of up to 1 m from the base to its crowning. It is a façade that recognises its visual foreshortening and emerges from this condition with the maximum possible advantage, building a façade with thickness, with shadows, which from its complexity in this case allows simplification to integrate into the environment. The rear façade, with joinery also located on the interior, generates a game of voids and groups the first two floors into a single opening, to obtain greater verticality. The inner courtyards of the hotel take on a special relevance and not only provide ventilation to some simpler rooms, but open to the interior distribution corridors. To solve the possibility of visual interference between corridors and rooms, a skin of vertical metal tubes in the shape of a diamond has been constructed which, like large curtains, solves this problem. At night, lines of hidden LEDs backlit the tubes, offering an image of the suspension of the light metal element in front of its enclosure or patio façades. One of the main challenges has been the industrialisation of the entire construction solution. It is a very light ventilated facade built from large modules of almost 5x3 metres that came completely finished from the workshop. This solution has had many advantages, including absolute control over its finish and faster assembly. The fact of minimising the number of different materials (black ceramic panel, glass and structure lined with brass) has allowed to simplify not only its formal solution, but also its construction.

Aquest edifici bancari s'emmarca dintre de l'academicisme monumentalista; una tornada a la "normalitat" clàssica després de l'impacte modernista. Apostant per un classicisme depurat, l'autor proposa un volum de maó vist, de color roig, sobre el que se superposa una escenografia d'elements fets amb pedra: encoixinats, semicolumnes i medallons. Les imponents reixes de les obertures de planta baixa accentuen, encara mes, el caràcter inexpugnable de l'edifici. L'interior, remet al luxe bancari -habitual- dels anys 30. Quan el Banc d'Espanya abandona Tortosa, l'edifici va acollir diferents activitats administratives i docents.