At the 2017 Users’ Conference there was a presentation from The University of Edinburgh about a methodology they have developed for modelling future room requirements. Durham has taken this model and developed our own methodology to not only model future room requirements encompassing growth, but also room requirements for new buildings, disaster planning scenarios and also data on predicted class sizes. The presentation will give a brief outline of the Durham methodology and give examples of how it has been used, its strengths and its limitations.