Stellahaus, Office building from 1920s in Altstadt, Germany.

Stellahaus is a ten-story office building at Rödingsmarkt 52 featuring a plastered facade with large pilasters, cornices, and ornamental friezes. The structure showcases classical architectural detailing that characterizes early 20th-century Hamburg commercial buildings.

The building was originally constructed as a five-story office structure in 1875 and received five additional floors between 1922 and 1923 using advanced iron construction techniques. This expansion reflected Hamburg's modernization during the 1920s.

The name likely derives from the Latin "stella" for star, echoed by the expressionist ornament on the plastered facade. On the harbour side, four half-relief sculptures by Hamburg sculptor Richard Kuöhl depict Hanseatic cogs. Above the entrance door sits a relief of Poseidon as a boy.

The building is located in central Hamburg-Altstadt and is easily accessible by public transport. The site sits amid the city's business district surrounded by other historic and modern structures.

The five upper floors added in 1922–1923 rest on their own iron framework and foundation, because the 1874–1875 building by Martin Haller could not carry the load. The stepped storeys give the Stellahaus its tower-like outline.