Extensions can be added to various parts of a building, such as adding extra rooms, enlarging a kitchen, creating a new wing, or extending the upper floors.
Gellir ychwanegu estyniadau i wahanol rannau o adeilad, megis ychwanegu ystafelloedd ychwanegol, ehangu cegin, creu adain newydd, neu helaethu'r lloriau uchaf.