Outside wall in neighbors yard, poor condition? PICS

[Mark F.]

Hello BP,

Today I was approached by the neighbor who backs up to me. There's a concrete wall that separates us and a drop off. The owner of the property started saying it's in poor condition (broken english) and I need to replace it. He said he called the city who said it's on my property line. I explained to him I'm the new owner and this the first I'm hearing about this.

I told him I'll look into it. He let me come on his property and I took photos. He says the wall is getting worse in a certain area and hes worried it'll collapse on to his property. I'm no contractor but obviously one section is totally fine. What do you think about the other parts? I still need to verify it's my property. I assume if I call a contractor they'll just tell me to replace it. What type of contractor do I need to call exactly? And whats your opinion of the wall?

I believe the tree roots are pushing against the wall, making it worse. Am I wrong? Thanks for reading!