I would like a feature added to the repair hammer that while equipped shows the land in 2 shades of color around you. Red if its claimed(by NPC or player) and blue if it is your land. No highlighted color is unclaimed land. It would also have a tool-tip saying who owns the land. Not only would this make planning out builds more efficient but it will also help finding sunken foundations.
I know you can just activate a foundation and move it around until its not red to find another players border; my reasoning is I would like to clearly see my border.