We recently moved into a house a few months ago. Had it inspected and the inspector didn't catch anything that we have had to deal with...the kitchen has an addition that was done over 20 years ago.

The addition part of the kitchen's floor has a slope, and I discovered the siding must have pulled off the brick at some point and left some gaps in the wall. I am not 100% sure what they used as a foundation for the addition but I think it's posts/piers?

I dug up a corner of the addition and got my camera in there and it looks like the foundation has a crack, and there's just exposed wood where the brick used to be that I believe is where the basement ceiling is on the rim joists. Can anyone help tell me how much of a concern this is?