The sides and roof of the old coop are actually metal. The front is wood and maybe the back (I'd have to double check). The base seems to be buried into the ground. I don't think anything is rotting but some of the trim, but I could be wrong. If nothing else, I was thinking perhaps I could sand and stain it (or sand, prime and paint it) to have a secondary coop for adolescent birds or quarantine (though I hope I never need that).
Hmm well I'd definitely check the metal for any sign of rust or deterioration. For me the main issue is the roof really needs to be raised (and possibly pitched more sharply, to help with rain/snow), and of course a human door added. There's also gaps which rodents and small birds could squeeze into, but not sure how big/bad they are.
Wouldn't be a bad secondary unit or maybe even storage for coop supplies, depending on how big it is.