Brick and Mortar Bricks should still be relatively straight after the settling of a house. If mortar is missing it should be replaced. Severe sagging brick lines should be looked into. Siding and Trim Wood will need painting at some point. The bottom rows and facia should be checked for soundness and moisture.
Mildew indicates moisture problems whether wood, aluminum, vinyl, etc.
Rotting wood needs to be replaced. Steel siding may show signs of rust. This can be treated and painted. Locks should also be checked to make sure they are operable. Doors that open or close on their own, need adjustment.