Listed Building Consent for Grade II* and Grade I structures and buildings usually takes longer as Cadw are involved in the approval process.
Bydd Caniatâd Adeilad Rhestredig ar gyfer strwythurau ac adeiladau Gradd II* a Gradd I fel arfer yn cymryd mwy o amser gan y bydd Cadw yn rhan o'r broses gymeradwyo.