Hi Eli. You could check with the building department whether there are any applications for developments nearby. Many times they start out with the county/city officials before they start approaching individual property owners to purchase their land/properties. Let's face it, would you start buying up properties without having a workable plan and what's workable will depend on what the development agencies will allow you to do. I hope this helps. If they are in the preliminary stages, the developers may have given properties owners documents showing their intent to purchase in the future or they may have entered into option contracts, which would be recorded documents. The best thing would be to start checking with the development agency and contact nearby owners to find out if they had been contacted by developers. I know that will take a little bit of effort on your part, but if you are truly concerned about future developments, it will be worth the effort. Good luck.