HPP Architekten GmbH[1]​ is a German architectural company that operates nationally and internationally with headquarters in Düsseldorf, Germany. As an architectural association, HPP is represented with a total of twelve office locations in Germany, China and Türkiye and employs 450 people. The subsidiaries HPP International Planungsgesellschaft mbH and HPP Service GmbH are also registered in Germany.[2]​[3]​[4]​.

In 1933, after working for Ernő Goldfinger in Paris and Norman Bel Geddes in New York City and after completing a legal internship in the state buildings administration, Helmut Hentrich founded his own office in Düsseldorf, a precursor to the current company HPP. Two years later, Hentrich merged with Hans Heuser&action=edit&redlink=1 "Hans Heuser (architect) (not yet drafted)") to form the architectural association Hentrich & Heuser. His office participated in the main competitions of the German Empire. In 1944, the working group for the reconstruction of cities destroyed by bombs") gave him the task of planning the reconstruction of Krefeld. After the Second World War, it continued its successful work as a well-established office, also thanks to good contacts with Friedrich Tamms and Hanns Dustmann"), who were planning the reconstruction of Düsseldorf. These relationships were critically questioned in the Düsseldorf architectural dispute.[5]​.

When Heuser died in 1953, Helmut Hentrich continued working with Hubert Petschnigg), in 1969 new partners were accepted. From now on, the office was called HPP - Hentrich-Petschnigg & Partner.

Internationalization began in 1968 and HPP designed the location of the Standard Bank Center office in South Africa, the city's first skyscraper. This was followed by further international projects and the first international locations in the 2000s.[6] After the death of Hubert Petschnigg in 1997 and the death of company founder Helmut Hentrich in 2001, the general management of the architectural studio was reorganized. In 2017,[6]​ HPP Hentrich-Petschnigg & Partner GmbH + Co. KG changed its name to HPP Architekten GmbH.

The Düsseldorf architectural association is now in its fourth generation and is represented nationally and internationally with 13 office locations and 450 employees.[7]​.