10 Dyrekcyjna Street in Katowice, Protected residential building in Katowice, Poland.

The building at 10 Dyrekcyjna Street is a corner structure with modernist design and Art Nouveau elements standing at the intersection with Warszawska Street. It has residential spaces on the upper floors and commercial areas at street level.

The building was completed in 1906 for its first owner, L. Altmann, and later his heirs. The design was prepared by Ignatz Grünfeld's construction firm and signed by Hugo Grünfeld; it was built at the same time as the neighbouring house at 6 Staromiejska Street, with similar exterior detailing. Between 1935 and 1939 the building was raised by one storey, losing its original mansard roof in favour of a flat roof. It was entered in the register of monuments on 31 December 1994.

The building's interwar tenants reflected a mixed commercial life: the iron-trading company "Katowicki Handel Żelaza" had offices on the first floor, E. Korzuszasz ran a state lottery collection point, and a corset workshop operated on site. From 1924 to 1926 the "Elektrolux" shop sold vacuum cleaners and floor polishers, and in 1927 the Bank Udziałowy w Katowicach, affiliated with the Union of Jewish Cooperative Societies in Poland, was founded with its seat here.

The structure stands centrally in Katowice at the corner of two main streets and is easily accessible on foot. Access is straightforward, and you can view the exterior architecture and ground-floor shops from street level.

The building was raised by one storey between 1935 and 1939, which removed its original mansard roof and left a flat roof. The corner bay window rests on two decorated brackets and spans the second to fourth floors. The staircase windows are glazed with crystal and coloured panes.