If you have property in Lantana then you might need a permit or other permission from community or Denton County. Here is a link to the page for Lantana to help you begin to determine if you need some form of permit.
Stratum Foundation Repair also has created several videos showing examples of foundation problems, such as visible cracks. You are welcome to watch our videos at this link.
Here is one of the videos which may give you a better example of a residential property with foundation-related problems: