If it is really an emergency (fire, heat failure, plumbing emergency, etc), not kicking down the door will cost far more than the $200 that a new door costs.

Apparently everyone decided I was proposing letting it all burn down. I was only wondering if, by letting the landlord have a key who could be used in an emergency, the tenants where reducing the risk of being on the hook for those extra $200. Of course the emergency must be dealt with.

Insurance company.

The apartment owner, or perhaps their insurance.