In the context of real estate acquisition, management and disposal, technical due diligence (TDD) is the term used globally to describe what is essentially a commercial building survey. Although it is a widely used term there appears to be a lack of clarity or consistency in what this actually covers; indeed there is often a bespoke nature to TDD instruction, tailored to specific client needs, sector norms or individual investment strategies. ‘It’s like beginning your geography homework on a Sunday evening knowing it has to be handed in the next day’ is the way TDD has been quite poignantly described by a high-profile chartered building surveyor – needless to say, not actively working within this field.