@CWilson said:
Might this be defrauding the Owners Corporation? Might we not expect back rent at commercial rates for the use of this property?
Definitely so.
Just make sure that his caretaking contract doesn’t allow him use of this area. If he is using common property he needs to pay a commercial rate to do so. At the very least you need to get the EC to issue him a NTC to stop using the area until he has agreed a price that he will pay for continuing use of the area and back rent for the last 10 years (not sure if back rent is feasible but he won’t know either and it might put the fear of god into him that he might have to pay $xx,xxx for past use of the area).