Three-storey rectangular building between partitions made up of three vertical sections: two at the sides (multi-purpose hall and theatre) and a central section (stairwell) that separates and distributes.

The roof of the halls is gabled with the ridge perpendicular to the main façade. The roof of the stairwell, on the other hand, is flat with a terrace. The facing, made of plastered and painted brick, is of well-squared ashlars with a bush-hammered plinth in the central section and smooth in the side sections. The crown of the building is characterised by a structure of two pediments flanking the quadrangular section of the staircase. The pediments are almost identical and have smooth, undecorated tympana. One of them has a balcony decorated with corbel-shaped corbels, arranged on a frieze that runs along the entire façade, ornamented with rectangular elements that imitate pilasters and are crowned by spheres.

As for the openings, they are distributed symmetrically on the ground floor and first floor, with the exception of the balcony described above, which would be independent and the only opening on the second floor. The entrance door is on the ground floor, flanked by eight symmetrically distributed openings consisting of two segmental arch doors and two lintelled windows. The first floor has a central balcony with a basket-handle arch and a projecting balustrade, which is flanked by three balcony windows. Its characteristic, and what gives the building its value, is the use of elements of classical design such as pilasters with Ionic capitals and semicircular arches decorated with plant motifs.

This building was inaugurated in 1922, and throughout its history it has undergone several phases of restoration.

Promoted by the Borràs industrial family, who had a factory in the municipality, it became one of the most important cultural centres in Castellbell i el Vilar. Since 1991, it has been owned by the town council.

In December 2001 serious structural problems were detected that forced the closure of its activity and even the temporary eviction of a savings bank located on the ground floor of the building. At that time, significant cracks were detected in one of the walls and the ceiling had caved in. When its structure was analysed, it was found that one of the central beams in the room had collapsed by about 15 centimetres.

Almost a year and a half later (in 2003) the first works began: renovation of the roof and replacement of the trusses - which were all wooden and were found to be badly damaged - with metal ones. In addition, the walls most at risk were tied down and the opportunity was taken to carry out an initial remodelling of the hall. With this intervention, the theatre was able to reopen.

In 2008, work began on renovating the stage machinery - electrically operated curtain rails, renovation of the entire electrical installation, lighting, curtains... - and the wooden stage was replaced with new, fireproof flooring. Finally, all the stairs to the stage were renovated, the doors and accesses were readapted and the dressing rooms and exterior façade were redone.