We live in a community of cluster homes. They are spaced closed together. On one side, there is only about 12 feet between our house and our neighbor's house. We only own about 3 feet of land on that side of the house. Our air conditioning compressors/fans are located there, and have been since the house was built (more than 25 years ago). The AC units are big and they span about a foot over the property line in the area between the houses. Our neighbor on that side is an elderly woman who constantly harasses us whenever we go to that side of the house to do work such as trimming shrubs. She likes to remind us of the property line and the fact that our AC units are going over the line about a foot. We really have no control over this because the houses were built so close together and that is where these units have always been. It was this way when we bought the house. Can the neighbor force us to move the AC units after they have been in that location for two decades? When we need to replace them, can she legally interfere at that point? She has interfered when we have had contractors working on our own property, so we would not be at all surprised if she tried to do so if we were having the AC units replaced but in their same location.