Last thing you want to do is get lawyers involved.
My reply was based on the WA laws so yeah need to look at local laws, it's a common issue so should be able to find a brochure that explains it clearly
But again always good to have a friendly chat with the neighbour.
LOL I had a big tree out the back I wanted gone so when new owners approached me about cutting it back I just said, yes by law you are allowed to. Gees they didn't hold back but they got rid off all they cut down, there was a hell of a lot, it was a big tree