Player owned property with trigger box

Hi, I would like to know if there’s a way to implement a Deed system for a game that I’m working on. For example, I would like the player to be able to buy a plot of land(s) and be able to place a premade building big enough for the size of the land or to be able to build a building big enough on the plot of land(s). I was given this example but I don’t know much about how to set it up “Player owns some space and builds a trigger box there + saves itself reference into it.
So, only the player with that ref can build inside the trigger box” can anyone Help, please