Karberghus is a Danish real estate company based in Copenhagen, Denmark. It specializes in the acquisition, restoration and renting out of historic properties in the Copenhagen area and is a member of BYFO, Historiske Huse and Europa Nostra. Karberghus is the owner of the company Office Club offering coworking in historic buildings in Copenhagen.

Brønnum House is a richly decorated 1860s apartment building situated adjacent to the Toyal Danish Theatre's Stærekassen extension and the Harsdorff House on Kongens Nytorv in central Copenhagen, Denmark. It was constructed as one of the first new buildings when the former Gammelholm naval dockyards was transformed into a new residential neighborhood. Café Brønnum, frequented by actors from the adjacent theatre, was based in the building for more than 100 years. The homes of the wealthy Jewish businessman Martin Henriques and Bernhard Hirschsrpung on the first and second floor were both frequented by some of the leading cultural figures of their time. The building was listed in the Danish registry of protected buildings and places in 1995. The building is now owned by Karberghus. It houses a high-end cocktail bar on the ground floor and serviced offices on the upper floors.