Serra House originally consisted of two façades at a crossing (Rambla de Catalunya and Còrsega-Rambla de Catalunya chamfer) with a tower in the corner that articulated them, and a single-storey body, on the roof of which there was a garden-pergola that supported a vegetable roof with wooden columns. Unfortunately, a later extension placed a series of Noucentista floors over the garden, totally modifying the proportions of the house. The place where the house is located suffers from a slight slope, which Puig corrected by building a semi-basement very characteristic of the architecture of his time. The tower is a cylindrical body of a higher height than the lateral bodies and culminates in a tall cone. This tower broke the symmetry of the building by dividing the two façades, in which Puig established differentiations through the placement of a balcony on one of them and through a tribune in the other. The use of large ashlars in the plinth and smaller ashlars in the rest of the building had a more plastic than constructive purpose. The façade is decorated with sculptures and other stone works, some of which belong to Alfons Juyol. Pere Serra i Pons commissioned the architect Josep Puig i Cadafalch to build the house that still bears his name in 1900. It was about building a small palace that would function as a single-family home, like others in the Eixample that highlighted the power of Barcelona's industrial bourgeoisie. The house, however, was never lived in by the Serra family, as it was sold before it was finished to the congregation of nuns of Santa Teresa. The initial use for which it was conceived varied considerably, so the nuns carried out small modifications to be able to use it as a school. Due to its uniqueness, the building deserved the attention of the Barcelona City Council, which awarded it the prize as the best building of the year 1908. Between 1943 and 1945, the functioning of the school required an extension. Josep M. Pericas added two floors and a ground floor body to the Serra House following the style of the original work and under the supervision of Puig i Cadafalch. Between 1982 and 1985, these additions were removed and the building was adapted, while the interior space was redistributed, to house the services of the Barcelona City Council. In 1907 he obtained the Barcelona City Council award.