The Museum now has two larger and two smaller objects linked museum park. The central and largest building of the museum is the Border watchtower, square-storey house with a porch.

It was built in the early 19th century as a military facility, and the only such example vojnokrajiške preserved fortification on the Croatian territory.

The second museum building - Agency built srednimom 19th century, at a time when the Sava, Danube and Tisa first Croatian sailing ship, "Harmony". Initially, therefore, was used for the steamboat to agencies since 1977. became an inseparable part of the museum. The other two smaller facilities are used as auxiliary facilities and museum storerooms. Since 1996. to 1998. The Museum conducts intensive rehabilitation Guardhouse, and later the Agency. Upon completion of remediation approaches to making the spatial distribution of future permanent exhibition of all museum collections. Permanent exhibition of ethnological department at the Museum "Stephen Gruber" in Zupanja to said spatial layout is situated in the building of the Agency. That object on the ground floor has two rooms, one larger (56.60 m2) and one smaller (16.60 m2). They are linked together by opening fire wall so visitors allowed circular motion when sightseeing setup. The top floor of the same building permanent collection includes presentations of old crafts.

Permanent exhibition of ethnological collections in the Regional Museum "Stephen Gruber" in Zupanja is designed so that the primary theme for the presentation of traditional culture are classified according to seasons (customs through the year), but also the life habits (from birth to death). Within these themes have been presented in numerous ethnological objects are natives, Croatian population catholic - Šokci the area city of Županja used to perform everyday or occasional work in the household. On display is mainly covered the period from the mid-19th By mid-20th century, with several exhibits in the recently reconstructed according to the original site, or the photographs from that period.