Tree property line disputes with adjoining property owners are common boundary disputes. Overhanging branches, hedges or other plants or vegetation are frequent problems that can be a nuisance. The best way to resolve the tree property line problem is to speak to your neighbor and work out a mutually agreeable resolution if possible. Document everything in writing as well in case you have to go to court. You may need to order an updated survey which will reflect your property boundary lines to determine where the tree base is located. If the tree property line issue cannot be resolved between you and the neighbor, then you may want to get other neighbors involved to help or speak to an attorney. Sometimes it is necessary to file an action with the court, and let the judge decide a resolution. If you do obtain a court judgment in your favor, follow up to make sure the problem is resolved.