FHA (203K) - Unpermitted Addition in Denver

[Joshua Smith]

I am talking to the seller of a property in Denver. The house is in a great location and has a unpermitted addition in the back that can be rented out long term or airbnb (has a bathroom). 

My question is will the FHA appraiser/inspector look into the fact that it's permitted/unpermitted?

Also, the chimney is leaning, looks like it's about to collapse and the garage is sort of crumbling brick. Not sure how much that will cost in the 203K; But I guess I'll find out if I put it under contract. Any feedback on that is also appreciated.