Europe’s largest 3D-printed residential building is being built in Heidelberg

The Dreihaus project at Campbell Areal in Heidelberg is the focus of an extensive article in the business magazine econo. In issue 5/2025, the magazine reports on the building’s innovative construction method and the role of modern technologies in residential construction.
The article describes how a building is being constructed on the former Campbell Barracks site, with its load-bearing walls fabricated using a large 3D printer. A robotic arm applies concrete layer by layer, forming the structure of the house directly on the construction site.

A milestone for residential construction

According to those involved, the project marks an important step for the future of building. The so-called Dreihaus is considered a reference project for serial 3D printing in residential construction.
The technology makes it possible to erect buildings faster while using resources more efficiently. According to project participants, a building constructed this way can be completed around thirty percent faster than a comparable apartment building using conventional construction methods.
The technology also opens up new economic perspectives, as building processes can be more highly automated.

Innovative construction method with serial potential

The building’s design is specifically tailored to 3D printing. The residential units range from approximately 46 to 89 square meters. A total of six to nine apartments are being created within the building.
The project demonstrates how the technology can be used for future construction projects. The developed concepts can be used multiple times, offering potential for broader application in residential construction.

More sustainable materials in the construction process

Beyond the construction method, the materials used also play an important role. A specially developed cement is used for the building printing, which generates significantly less CO₂ compared to conventional building materials.
The material was specifically developed for use in 3D printing and is intended to help make construction processes more sustainable.

HEI³ Apartments boarding house planned

Completion of the building is scheduled for summer 2026. The building will then operate as a boarding house.
Under the name HEI³ Apartments – Heidelberg hoch 3 (Heidelberg cubed), modern apartments are being created where guests can experience staying in a 3D-printed building. Business travelers, professionals and interested parties will have the opportunity to experience this innovative form of construction and living for themselves.

Source
Bauroth, Katja (2025). „Turbo für den Wohnbau: Jetzt wird gedruckt statt gemauert“, econo Wirtschaftsmagazin, issue 5/2025: 64-66.