The tree is an adjoining neighbors backyard with large branches that come pretty close to my house (Though there is a sizable gap, if it comes down under the wrong wind direction…) and are actually touching another neighbors roof.
If it is unhealthy, is it recoverable? I’d rather not have them cut the whole thing down (it provides a lot of shade for my backyard (well, when it’s healthy that is lmao)) Should I talk with them directly (I don’t really know them, at all) or let the city know?
Split trunks like that form a weak spot for rot, but you’d be better to have an arborist look at it.
It can be corrected by drilling a bolt through each trunk and wiring them together so each is supporting the other instead of leaning and pulling apart.
https://www.heartwoodtreecompany.com/blog/how-to-fix-splitting-tree