A rectangular, two-storey building with a broad façade and shallow depth. Symmetry and horizontality dominate the composition, only broken by the crowning element of the structure. It features a large number of openings: three entrance doors with interspersed windows on the ground floor, and on the first floor, seven additional openings, five of which share the main balcony.
Notable elements include two medallions with floral motifs, the wrought-iron balustrade of the main balcony, and the sgraffito decorations bearing the inscription: “Casa Consistorial 1912”, with the coat of arms of Navarcles at the centre.
In 1910, after receiving 7,500 pesetas from the redemption of a ground rent paid by the Solervicens family for the Navarcles mill, the Town Council approved the development of the present Plaça de la Vila and the construction of a new municipal building to replace the old town hall in the Plaça Vella. The project was commissioned to the Manresa-born architect Ignasi Oms i Ponsa and was completed in 1912.

The Town Hall building presides over the Plaça de la Vila, with which it forms a single architectural ensemble, as both were built at the same time. The original building has been recently extended at the rear. It consists of a single rectangular block with a ground floor and an upper storey. The most significant feature is the main façade, which faces the square.
Although the architect Ignasi Oms was already fully immersed in his Catalan Art Nouveau period when he designed this work, the façade is a predominantly classical composition, showing only faint Art Nouveau touches in its decoration — for example, the wrought-iron work of the railings and the simple sgraffito beneath the roofline, which accentuates the varied heights of the crowning profile. The façade also features a broad balcony and, at its centre, the inscription: “Casa Consistorial. Año 1912”. The Art Nouveau façade that once existed at the rear of the building was lost during the 1960s.
The interior has been recently refurbished and preserves no original features except for two cast-iron columns. The current rear façade is sober in style and includes a large window overlooking the Parc Marcel·lí Monrós, as well as a prominent clock.
In 1910, the former town hall (demolished after the Spanish Civil War) stood in the Plaça Vella and was in danger of collapse. That same year, during the mayoralty of Joan Errasti, the council received 7,500 pesetas from the redemption of a ground rent paid by the Solervicens family for the Navarcles mill. It was then agreed to develop the present Plaça de la Vila and to construct a new municipal building.
The chosen site was an open plot of land, and the project represented an ambitious urban operation intended to connect several streets that had remained unlinked since their construction in the eighteenth century. The commission was awarded to the architect from Manresa, Ignasi Oms, and the work was completed in 1912.
The new building also housed the public schools until the 1960s, when new premises were constructed. During the 1930s, the ground floor of the new town hall also served as a municipally controlled meat market.
In 1969, the building underwent its first refurbishment to provide new offices on the ground floor. During these works, several Art Nouveau windows at the rear were lost. In 1970, the building became home to the Biblioteca Popular Sant Valentí.
In 1995, a new refurbishment project was commissioned from the Barcelona architect Joan Fabregat, carried out between 1997 and 1998. This intervention respected the Art Nouveau façade, restoring it to its original form and reinstating the sgraffito decoration. The works completely remodelled the interior and expanded the building with a new rear structure that harmoniously integrates with the original volume. This new façade enjoys fine views over Parc Marcel·lí Monrós.