As the use of historic building as venues for commercial activity grows, events management professionals working in historic buildings are faced with a number of sustainability challenges, including conservation, preservation, social value and financial sustainability, as well as with satisfying their clients. In particular, these professionals are required to maintain the complex balance between the competing priorities of historic value and contemporary relevance. Little research has thus far investigated the role that sustainable events can play in the management of historic buildings, beyond considerations of the trade-off between conservation and income generation. This research analyses the contribution that events can make to the sustainable management of historic buildings, with an emphasis on understanding the perspectives of event managers within these properties, based on qualitative interviews with historic building event managers and stakeholders in London, United Kingdom. A key finding of the research is that event managers within historic buildings have complex views of sustainability that are specific to these properties and which are not captured in the mainstream events management literature. The paper contributes to the emerging literature on sustainable events and also develops earlier research on the role of events and other income-generating activities in historic buildings.