IsCellOwner
Syntax:
IsCellOwner CellID NPC/FactionID (optional)
Example:
IsCellOwner WhiterunDragonsReach DragonsreachOccupants IsCellOwner WhiterunBreezehome
Returns 1 if the specified cell is owned by the specified NPC or Faction. If the second parameter is left blank, the function returns 1 if the cell is owned by the player.
NOTE: Most spaces in Skyrim use faction ownership rather than actor ownership.