Both railway headquarters were designed by Stanislawow architect Tadeusz Kowalski (1912-1942). This distinguished Stanislawow from Lviv, where, for the newly established railway union headquarters, the design was developed in Warsaw, at the Construction Department of the Polish State Railways Directorate.

The railwaymen's associations represented some of the most important professional organisations in interwar Poland. The Polish Railwaymen's Union (PZK) and the Railwaymen's Trade Union (Związek Zawodowy Kolejowców) were significant institutions in the political and financial spheres between 1919 and 1926, bringing together activists with national views. They were merged in 1929 into one organisation, the Union of Polish Railwaymen. In Stanislawow, the railwaymen's circles were involved in such significant investments for the city as the construction of the church on Gorka. their own union buildings.

The PZK, affiliated with the national parties People's National Union and Christian Democracy, was so powerful at the time that it built its own edifices all over Poland. Houses for Polish railwaymen were then erected in Katowice, Kraków, Poznań Toruń and Vilnius, in addition to nearby Lviv. In Stanislawow, both the PKZ and ZZK began efforts to erect their own union buildings in 1925. The local branches of the PKZ and ZZK had a strong social position, primarily due to the presence of a large railway workshop company. The chairman of the Stanislawow branch of the Union of Polish Railway Engineers in 1925-1933 was the aforementioned honorary chairman of the Christ the King Church building committee, Włodzimierz Dziekoński (1886-1966), later president of the nationwide Union of Polish Railway Workers, formed in 1929 as a result of the aforementioned merger of the PKZK and ZZK.

The project for the Stanislaw building of the Polish Railwaymen's Union was conceived in 1925, as one of the first monumental undertakings of the Polish Railwaymen's Union in Poland. In 1927, the construction was completed. Built in two years, the imposing edifice, with its richly decorated, baroque-like staircase, testified to the power of the association. The monumental three-storey PZK building stood on the corner of Armenian Street and 3 Maja Street (now Melnychuk and Hrushevskoho Streets). A resident in need of landmarks could easily find his way to this edifice thanks to its prominent rounded corner with a squat tower. The architecture of the ZPK building is an example of a variation of the 'intermediate forms' style with simplified classicising motifs, a set characteristic of the mid-1920s.

The ground floor, housing the retail and service units (including a restaurant) and their large display windows, was clearly separated from the floors by a cornice line. Inside the multi-purpose (listed as a residential building in the lending documents) edifice was a large auditorium with an auditorium and stage; it was entered via an elegant high foyer via a staircase to the first floor. In addition to the main representative staircase, the building had two side staircases. The entrances, preceded by restrained neo-classical portals, led from Ormiańska and 3 Maja Streets. The building of the Polish Railway Workers' Union became an officers' house under the Soviets, and later lost any social affiliation, and became the headquarters of a bank. In 2014, the ground floor of the building became the headquarters of an important urban social grassroots initiative called Urban Space, becoming a meeting place and a generation of ideas directed towards the development of the urban space of Ivano-Frankivsk.

In a slightly different stylistic formula, but just as quickly (in less than a year), a second building for railwaymen was erected - the Professional Union of Railwaymen, near the railway station, on Grunvaldzka Street. Simpler in comparison to the representativeness of the PZK edifice, the architecture of the ZZK building, with a slight tendency towards art déco, more strongly accentuated in the frame of the main entrance, was clearly functional. Its main space, like that of the PZK, consisted of a large meeting hall on the ground floor and offices and rooms for smaller meetings on the first and second floors. This building functioned as a railwaymen's house during the Soviet period. During the free Ukraine period, the railwaymen's house became an office building, sold off and parcelled out among larger and smaller tenants and owners.