The operation phase of larger buildings is usually managed by professional facility management organisations, which typically plan building improvement measures (maintenance, repair, replacement, renovation) based on economic optimisation. Increasing societal attention to environmental impact of building operation is pressuring these organisations to include this aspect into their operation plans for the use phase. In a recent study, Danish facility management organisations highlighted a knowledge gap regarding environmental impact of operational activities, particularly maintenance. Consequently, organisations are unaware if the most cost-effective option is also the most environmental-friendly. The conclusion from a literature review and a workshop with facility management practitioners presented in this paper was that there is a gap and a need for a framework that enables facility managers to determine which combination of maintenance, repair, replacement and/or renovation of the building envelope has the lowest environmental impact. This paper, therefore, presents a proposal for a framework consisting of a three-phase process - user input about a specific building is the starting point for an assessment of the life-cycle impact of potential renovation solutions (maintenance, repair, replacement, refurbishment) on environmental performance and technical lifetime, which is then combined into different strategies for the use stage. Finally, the potential usefulness of the framework is demonstrated through an example.