The substation, built to service the now non-functioning Mius tram depot, is located in the neighboring block. This four-story red brick building, adorned with decorative plaster elements, features a tower and staircase.

The structure was erected in 1904 and is designed in the style of industrial red brick eclecticism characteristic of that time. The historical appearance of the main facade has been almost completely preserved. The internal layout of the building has been altered multiple times, but only within the load-bearing walls. Despite its age, the substation continues to fulfill its function, providing electricity to the tram overhead wire network.

On the first floor of the substation was the machine shop, which has high ceilings with vaulted ceilings (Monier vaults). Previously, the facade of the first floor had large windows with brick arched surrounds, which are now bricked up, but the original surrounds have been preserved. The first floor is separated from the upper floors by a toothed cornice. The second and third floors housed auxiliary rooms and staff quarters. The window openings on each floor have their own decoration: rectangular surrounds on the second, and arched on the third. The facade of the third floor is decorated with flat applied columns and pilasters, stylized as rustication. A toothed cornice also runs along the upper part of the building.

The central entrance to the substation is located from the courtyard in a one-story annex built later than the main building, but designed in the same style. The substation building has memorial significance: in 1908 and 1910, it was here that the installer Mikhail Ivanovich Kalinin worked, who later became a prominent Soviet state and party figure. In memory of this, a memorial plaque has been installed on the building.