Museum Haus Konstruktiv's collection currently comprises over 1000 works from the 20th and 21st centuries. Since 1986, when the foundation was established, a significant inventory of constructivist-concrete and conceptual art has been built up, thanks to generous donations from artists and their descendants, as well as from collectors. With permanent loans and purchases, made possible by bequests and the patronage group Fonds Konkret, the collection is being enlarged in a targeted manner.

The online information about the collection is updated on an ongoing basis.