Unoccupied property that forms a part of a single property which includes another property and may not be let separately from the other property without a breach of planning control.
Eiddo heb ei feddiannu sy'n rhan o un eiddo sy'n cynnwys eiddo arall ac na ellir ei osod ar wahân i'r eiddo aralll heb dorri rheolau cynllunio.