Imponent edifici, entre mitgeres, que en l'actualitat presenta dues plantes afegides respecte l'obra original. La façana al carrer Berenguer s'ordena al voltant d'un eix de simetria central. Als baixos destaca la galeria d'arcs sobre columnetes i, al primer nivell, apareix una tribuna amb pinacles i gàrgoles de pedra que contrasten amb l'auster arrebossat actual de la resta del parament. La façana posterior presenta, a la terrassa de la planta primera, una notable galeria vidrada, de planta semicircular. A l'interior, cal observar la riquesa dels treballs d'ebenisteria i els sostres, decorats amb estucs. Des de gener de l'any 2000, acull, al pis principal, la seu dels arquitectes de la Demarcació de l'Ebre.

The La Unión Metalúrgica old industrial complex was located in the Poblenou neighbourhood (Sant Martí district), in a block of houses designed by Ildefons Cerdà, bounded by Zamora, Almogàvers, Pamplona and Sancho de Ávila Streets. In 2004, it was largely demolished, and only the entrance pavilions, located on the chamfer of Almogàvers and Pamplona Streets, were preserved. This building, currently isolated, used to give way to the interior of the enclosure. It is a construction parallel to the chamfer, with a simple volumetric ensemble of two floors that rises an additional floor in the central part, all topped off by a passable flat roof. The façade of the building is characterised by the almost exclusive use of exposed brick, incorporating delicate ornamental elements of artificial stone based on medallions and plant motifs. The main façade, facing the chamfer, is divided into three vertical axes, and in the central one there is a higher floor. On the ground floor there are four rectangular windows located on the sides of the access portal to the interior of the factory. This, with a large, angled arch, has its parallel on the rear façade, and creates the axis of symmetry of the composition of openings, very weighted and organised. On the second floor there are three large split windows crowned by thin arches. On the upper floor there is the massive roof enclosure, and in the central part there is an opening topped by a semicircular arch and divided by three handrails. All these elements emphasise the outstanding element of this façade, located under the undulating crowning of this central part. It is a ceramic mosaic with the name of the company, in green letters on a white background. An old metal lantern that illuminates the entrance door is also preserved. This is the only element that remains of the La Unión Metalúrgica factory complex, promoted by Dionisio Bobín Sirot, which has its beginnings in 1889. In 1903 it becomes a limited company to dedicate itself to the purchase, sale and the casting of materials and objects of iron and other metals. Between 1899 and 1906 the company was reported because some of the constructions it carried out were illegal. When these problems had been solved, between 1908 and 1914, the new factory was remodeled with new buildings. It was at this time that the entrance hall was built, signed by the architect Josep Maria Plantada in July 1914. On December 31, 1936, on the Civil War, La Unión Metalúrgica was established as a collective worker destined for the war industry. Two office buildings, an aparthotel, green areas, and sheltered housing are currently being built on the land where the industrial facilities were located.