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Christoph Ingenhoven is one of the leading international architects committed to sustainable architecture. The ecologically and economically responsible handling of resources is at the core of his designs. This quality has been confirmed by the highest certifications according to international standards. These include LEED, Swiss Minergie-standard, BREEAM, and DGNB.
Christoph Ingenhoven is a founding member of architecture societies and federations including but not limited to the German Society for Sustainable Building (DGNB) and the Federal Foundation for Building Culture. Furthermore, he is a member of the North-Rhine Westphalian Academy of Sciences and Arts.

The practice’s most important realizations include: The Lufthansa headquarters at Frankfurt Airport, the European Investment Bank in Luxembourg, the Daniel Swarovski Corporation’s headquarters at Lake Zurich and the health resort Lanserhof at Lake Tegern.
By 1997, the RWE Tower in Essen was completed. It is one of the world's first high-rise buildings with a double façade facilitating the natural ventilation of office spaces. In the same year, the design for the Stuttgart Central Station was awarded first prize in an international architectural competition. In 2006, Christoph Ingenhoven received the Global Holcim Award Gold for the project, one of the most prestigious architectural awards.

One of the practice’s core competences is the planning and realization of high-rise buildings. In 2012, the office was awarded the International Highrise Award for 1 Bligh in Sydney, a 139-meter-high building certified with the highest Australian Green Building rating "Green Star, six star".

In the beginning of 2022, the Toranomon Hills Project in Tokyo was completed. The project consists of an office tower, 36 stories and 185 meters high, and a residential tower, Japan’s tallest residential skyscraper at 54 stories and 220 meters high. The buildings are the second high-rise building project in Japan, after the Breezé Tower in Osaka (2005–2008).

To date, the practice’s largest project is the 400,000-square meter Marina One in Singapore. The high-rise complex features two office and two residential buildings that enclose a large public garden. 20,000 people work and live on the site. This model for tropical and subtropical megacities was completed in 2017.

The practice’s main office is located in Düsseldorf’s Media Harbor area. In addition, it is represented internationally in St. Moritz, Sydney, and Singapore.