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University buildings should have good environment qualities. This research aimed to (1) evaluate the Industrial Engineering Department building at Diponegoro University based on the green building Greenship rating published by the Green Building Council of Indonesia, and (2) recommend formulations to improve the green building score. The assessment was conducted by comparing existing conditions of the building with Greenship rating version 1.1. There were six assessment aspects: (1) Appropriate Site Development, (2) Energy Efficiency and Conservation, (3) Water Conservation, (4) Material Resource and Cycle, (5) Indoor Health and Comfort, and (6) Building Environmental Management. Each aspect consisted of some green building indicators. Primary data were collected through interviews and direct observation. The results of data processing showed that the Industrial Engineering Department building obtained a score of 52 points from a maximum of 114 points, which categorised it as a green building with a bronze ranking. Recommendations to increase the sustainability score were: provide special bicycle parking, add a vegetation area to the building with an area of 705 m2, conduct installation of renewable energy with photovoltaic technology for about 492.5 watts, build an installation for water treatment, perform air quality measurements, and organise sustainability-themed training regularly.