Listed Building Consent (PDF 47 KB) is needed when a proposed alteration or extension affects the character of a listed building, or those in its curtilage.
Mae angen Caniatâd Adeilad Rhestredig​​​​​ ​pan fydd addasiad neu estyniad arfaethedig yn effeithio ar gymeriad adeilad rhestredig neu adeiladau cyfagos.