Sustainability is oft thought of as the privilege of the large corporate – with sufficient funds to invest in anything from effective green Public Relations (PR) to improving its carbon footprint. What is perhaps less well-understood and documented is the range of activities undertaken by small and medium enterprises (SMEs), including very small entrepreneurial start-ups, some of which base their entire business rationale on sustainable principles. This paper uses a case study approach to explore the modus operandi of ecopreneurship and draws on both primary research and secondary data to develop and explore sustainable entrepreneurship in this sector. Preliminary findings suggest that ecopreneurial SMEs are looking to other goals alongside financial ones and are prepared to go to significant lengths to achieve such goals. Monetary measures are not, of course, entirely absent, but are very strongly conditioned by the ecoconscious nature of the business. In short, sustainability imperatives remain paramount. Copyright © 2010 John Wiley & Sons, Ltd and ERP Environment.