GET A LAWYER!!! There is no way to answer this question unless all the facts are on the table. You need an attorney who specializes in land use and zoning to review the boundary lines and easements and determine whether the neighbor has any rights. Even if he has rights, nothing can be done unless all applicable codes and zoning requirements are met. If he doesn't have rights, the attorney needs to determine if a demand letter will be sufficient or if you will need to go to court to get an order barring the activity.
E. Alexandra "Sasha" Golden is a Massachusetts lawyer. All answers are based on Massachusetts law. All answers are for educational purposes and no attorney-client relationship is formed by providing an answer to a question.
Get a lawyer. Nobody can answer this without reviewing the deeds to your property and your neighbor's property.
Do you want accurate, personalized, legal advice that you can rely on? You will have to hire an attorney, not ask on Avvo. I am not your attorney and am not creating an attorney-client relationship by this post. I am therefore giving only general advice. This advice may not apply to you or your situation; may not take account of all possibilities, and may not match the advice I would give to a client. DO NOT rely on this advice or any other advice on Avvo to make your legal decisions. If you want an answer to a legal question you should retain an attorney who is licensed in your state.
You should hire a land-use attorney immediatly. There are things you can do, such as challenging any permits that your neighbor needs to do this project, or reporting them from violations if they don't have permits. However, if they have equipment ready to go anything you do will likely be too little too late if you do not get an attorney to help you get an injunction or take similar action.