If you have DTC approved land and wish to build a compound wall, you generally have the right to do so as long as you don't encroach on government land. If neighbours are obstructing your construction, you can seek police assistance. If the police are unable to help, you may need to approach a civil court or the high court for an order to prevent further obstruction. Building on your registered boundary without encroaching should not be objected to, unless it blocks a common pathway.