KAK - I always remember the Seinfield episode when Jerry wouldn't let a man in, as he didn't recognise him - and he lived on the same floor as him!

I think that if you live in a building with security, no matter how inconvient it is, if you need work done, YOU as the owner/landlord should be there to let the people in, and not wedge doors open etc.

I hope your condo units return to safety soon.