In either of the condo associations I have dealt with or the ones my wife ran as the CAM, simply propping a ladder on the outside wall would have a condo commander calling the association manager. I was carrying a couple pieces of precut drywall into my FILs building and
20 minutes later the building rep from the association was knocking on the door asking us what we were doing. I had to show her and convince her these were partition walls inside the unit, not common walls. Bear in mind there is a concrete block wall separating each unit but they were nit picking that the drywall is the demarcation, not the block wall.