is a Croatian company active in civil engineering professional services and scientific research, including development of designs, studies, supervision, consulting, investigation works, assessments, laboratory testing and instrument calibration.

[2] Designs developed by Institut IGH include sections and structures on a number of Croatian motorways such as the A5 motorway Osijek - Đakovo section; the A4 motorway Novi Marof - Breznički Hum section and Hrastovec Tunnel on the A4 motorway; significant portions of the A1 motorway; as well as designs and other documents and services related to construction of the Pelješac Bridge; reconstruction and expansion of Port of Gruž, Dubrovnik, Croatia; construction of Adler - Alpika road near Sochi, Russia; reconstruction of Zagreb Airport etc.

The company is listed at Zagreb Stock Exchange and included in its CROBEX index.

[6] IGH was founded as Laboratorij građevinarstva (Civil Engineering Laboratory) in 1949, and renamed to Institut građevinarstva Hrvatske (Institute of Civil Engineering of Croatia) in 1951.

It became part of the academic system in 1962, and merged with the Faculty of Civil Engineering of the University of Zagreb in 1977.