There is no longer enough room in the Lesliehof. In addition to Raubergasse 10, rooms are leased in the Lindner House in Neutorgasse and in the Mildschuh House on Dietrichsteinplatz. Soon, this alternative accommodation is not sufficient to host the increasing number of students. The Ministry of Cultural Affairs and Education purchases land in Rechbauerstrasse which formerly belonged to Baron Mandell. Professors Josef Horky and Johann Wist assume planning of the Alte Technik – the original building of the new Imperial and Royal Technical College. The first ground-breaking ceremony takes place on 26 November 1884. The building is opened on 12 December 1888 in the presence of Emperor Franz Joseph I.
Besides the Alte Technik, various new structures are built on the former Mandell land. This development starts in 1965 with the construction of a faculty building for civil engineering in Technikerstrasse which is occupied in 1969.
Parallel to the construction of the main library according to the design of a team headed by Professor K. R. Lorenz, an extension is built in Technikerstrasse. Located on the south end of the plot at the fork between Technikerstrasse and Sparbersbachgasse, it is the first independent university library building in Austria. In 2012 the University Library building was comprehensively modernised.
In 1983 Architect Günther Domenig wins the competition for the building extension for the institutes of architecture and civil engineering in Lessingstrasse 25. Public protests finally lead to a very reduced version of the draft. Only in October 1993 do the first institutes move in. A glass body characterises the entrance area, and the relatively narrow hall with surrounding galleries on the individual floor levels is adorned by the “Wetterwand” by artist Christian Ludwig Attersee.
The architecture master studios in the converted roof space of the Alte Technik open just in time for the beginning of the winter semester 2017/2018. Across 800 square metres, the eight studios provide a total of 160 workplaces. Students of architecture can each use a workplace continuously for one semester for working on their designs.
The emerging development of the field of electrical engineering at TU Graz after the Second World War leads to problems with accommodating the institutes. In 1964 plans for the construction of a high-voltage engineering building are given the go ahead after suitable grounds have been found in the approx. 150,000 m2 Inffeld area in the Graz St. Peter district. From 1970 onwards, structures with big production shops and test halls are built bit by bit along Inffeldgasse on the south side of the area. Architects Ignaz Gallowitsch and Hubert Hoffmann are responsible for architectural planning. In 1972, the building complex with the attached high-voltage hall is handed over to the electrical engineering institutes.
The high-voltage hall – a distinctive eye-catcher on the Inffeldgasse campus – is renamed the Nikola Tesla Laboratory in 2006. The gigantic hall whose doors measure 14 x 14 metres is suspended from an outer steel frame and is extremely well shielded.
The construction of the mechanical engineering institutes on the Inffeld grounds proves to be more difficult. In 1967 architect Helmut Dorner wins the architecture competition, and the ground-breaking ceremony for the first tract of the institutes takes place in 1970. After extensive changes are made to the plans in the mid 1970s, the first mechanical engineering institutes move in in 1988.
Efforts going back many years to unite the scattered IT institutes finally result in the construction of a new complex designed by architect team Florian Riegler and Roger Riewe which is opened in 2000.
The Inffeldgasse Campus continues to grow. After 14 months of building work the Study Centre is opened in 2000. The new building at the centre of the campus was designed by architects Szyszkowith/Kowalski and host two institutes, a canteen with café, a teaching materials and teaching aids shop, laboratories and offices of the Buildings and Technical Support service facility.
The BTZ in Inffeldgasse was built in three construction phases. The BTZ houses laboratories for testing materials and components, and structures with their associated workshops and offices. Architectural firm Kampits & Gamerith take over responsibility for the architectural planning.
The Frank Stronach Institute, which was established in 2003 as a cooperation project between TU Graz and Magna, receives its first building in Inffeldgasse 11 after less than one year’s construction.
With an area of 1,500 m2, the nanoversity of TU Graz is opened in November 2011. The house for children in Petersgasse 136 is open for children of all ages – of both students and staff – and follows modern ideas of education. There is a strong emphasis on natural science and technology as well as gender and diversity. The children can pursue their interests irrespective of gender. Another feature is the “Marie Curie room” where there is a research laboratory especially for children and a workshop for big and small.
In November 2012 another new complex opens its doors on the Inffeldgasse Campus. With its three buildings and a car-free “main square” with seating, drinking fountain and free WLAN, the PTZ makes a strong mark on the campus. The PTZ scores highly in terms of energy efficiency. Some 100 geothermal probes, each buried up to 120 metres deep in the earth, supply power for heating or cooling.
The smartfactory@tugraz is built on around 300 square metres at the TU Graz Inffeld campus. The pilot factory has multiple roles: it is a research environment for future manufacturing processes, a practically-oriented learning space for students, a display and training space for partner companies of TU Graz, and a research factory open to all interested businesses (especially SMEs). Also in 2017 the first wave of significant extension projects is completed: buildings have extra storeys added, courtyards are filled in with new buildings and the Mensa restaurant is extended.
An extra storey is added to the FSI building in Inffeldgasse 11, and it is handed over to the Institute of Innovation and Industrial Management in September 2018. In April 2019 the 800-square-metre Schumpeter Laboratory for Innovation is opened – Austria’s newest maker space to date is a platform for collaboration between students, researchers, start-ups and established industrial companies.
In early 2019 the construction of the Electronic Based Systems Center (EBS Center) begins on the Inffeldgasse campus. The total floor area of the seven-storey building will be 4,600 square metres and it will house laboratories, workshops, offices and seminar rooms. Half of the space will be available for university spin-offs and SMEs in microelectronics. The other half will be used by the TU Graz Faculty of Electrical and Information Engineering, with the focus on electronics, sensor technology and high-frequency technology. A maker space for students will also be included.
The foundation stone for the new "Data House" and "SAL Building" (Silicon Austria Labs Building) is laid at the Inffeldgasse Campus. The two buildings are being constructed on an 8,800 square metre site in Sandgasse. The "Data House" will be the new home for the Institute of Interactive Systems and Data Science at TU Graz and for the Know-Center Graz. The start-up incubator Science Park Graz will also be housed here with a large number of its start-ups. Around 4,400 square metres of the building will be used for university purposes, while 3,900 square metres are reserved for use by companies. In addition to laboratory and office space, seminar rooms and common areas for students are also planned. The "SAL Building" will be the headquarters building of Silicon Austria Labs GmbH (SAL), where the focus is on research in the field of electronics-based systems (EBS).