Regarding Cultural and Creative Industries (CCI) concept-related development, an important aspect has arisen and become inevitable in the last few years: sustainability. Although sustainability and creativity are closely linked, it is important to examine the sustainability factors of creative city development from a broader perspective. The present research aims to explore the environmental sustainability of the cultural and creative industry of a Central and Eastern European capital, Budapest, through a literature review and then two case studies of environmentally sustainable CCI companies. The aim of the paper is to show the gap in the literature regarding the environmental sustainability of the CCI sector, despite its significance, and present two case studies of how environmental sustainability can appear in two CCI companies, showing a best practice. The literature analysis has shown that the interpretation of CCIs' sustainability and the comparability of the sector in the region under study are hampered by the wide variation in methodologies for measuring the sustainability of CCIs. In the case of Budapest, within the study’s 13 y reach, research has shown that Budapest plays a significant role in CCIs, although it also struggles with the issues of sustainability. The two case studies can show role models for environmentally sustainable CCIs by making sustainability the scope and basis of their operation.