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I am sorry to hear about this situation, Luba. This is a classic "neighbor's tree"s scenario. If there is vegetation that is crossing over unto your property, someone in your situation has the right to do the following:
1) Use self help to cut away whatever parts of the tree that are encroaching/damaging the property up to the property line; or
2) Go to court and get permission to do this, first, before doing so.
In either case, the amount cut away must be to the property line and must not damage the tree any more than necessary, and, one can get a judgment for reasonable expenses and damages to one's property.
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