by his own house, Villa Mercedes, on Carrer de les Escoles Pies; Eduard Schäfer’s house, on Carrer de Copèrnic; and Casa Valentí Soler, on Via Laietana, among others. He was the municipal architect for Montcada i Reixac, Ripollet, Begues, Molins de Rei and Sant Feliu de Codines, where he carried out various projects, such as the Ripollet Market, the Begues urbanisation, a school development and a sanitation and paving project in Molins de Rei, and the churches of Santa Engracia and Sagrat Cor in Montcada i Reixac. Serra built the right half of the building; seen from Carrer de les Carolines, and visible because it protrudes slightly onto the street, unlike the part built by Gaudí. The division is also noticeable by the different design of the tiles; Gaudí alternated them to give greater dynamism, while Serra arranged them in a uniform fashion. The extension took place between 1925 and 1927. The extension was carried out on the side where the dividing wall with the old convent was located; a new facade appeared, and the building became fully detached. At the street corner, Serra constructed a turret in the form of a small pavilion, identical to the one Gaudí placed at its opposite end. The renovation involved converting a single-family house into three independent houses, one per floor. To this end, the original staircase designed by Gaudí was replaced by another to be used for its new purpose. Another alteration was carried out in the covered porch, where the wooden latticework was replaced by glass, therefore closing the space entirely and losing the original idea of a space that connected directly with the garden. The water fountain, one of the most evocative elements of Gaudí’s project, was also removed. On the southwest side, when the narrow street disappeared, the perimeter wall had to be torn down and replaced by new sections of the palmetto fence. He kept the waterfall that was attached to the wall, which remained as a free-standing construction, and he opened the parabolic arch on the opposite side. However, the rockery at the base was removed and a pool was put in its place. Part of the structure of the waterfall was also clad in tiles, to imitate those of the house. He also built a small chapel at the end of the garden overlooking Avinguda Riera de Cassoles, which housed the old Santa Rita fountain. It