Although several drivers for and barriers to sustainability have been recognised in Higher Education Institutions, there has been limited research on analysing which are considered to be the most important. Two survey were sent to analyse this. The first survey was answered by nineteen respondents, whilst the second by eleven. The survey responses were analysed using descriptive statistics, rankings in order of importance, and comparison between types of drivers and barriers. This paper provides depth to the drivers for and barriers to sustainability in HEIs’ discussion by: 1) providing the importance of each driver and barrier; 3) offering a ranking of the drivers and barriers; 4) and analysing the relations between drivers and barriers to categorise them.