You have to make sure you’re constructing the individual rooms for the NPCs, probably. Here is a breakdown of what will be required for a room to be considered a viable home for an NPC: • The house has to have a minimum area size of 60 tiles. This includes the frame. The easiest dimension would be three tiles wide and ten tiles high rectangle. • The house needs to have at least one valid light source like a torch. • The house needs to have at least one “flat surface” item, such as a table or workbench. • The house needs to have at least one valid entrance, such as a door.