Thank you for your question and thank you kindly for requesting me to assist you further.To answer your question directly, any growth onto your property becomes your property and your responsibility. They are not legally required to remove their trees from their land if they keep growing onto your share of the lot. You also cannot sue them over neglect, at most if there is a municipal ordinance out that requires homeowners to maintain their trees, you could report them to the municipal board and see if they could be fined, but as those trees are on their lot, you cannot sue them over what is essentially their property. I wish I had a different answer for you, but trimming branches if they are on your property line is your responsibility and not theirs--they have not been taking advantage of you in that way, that obligation is lawfully yours and not theirs.Good luck.
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