If you want to alter, extend or demolish a listed building, you will need to contact your local planning authority to find out if you need listed building consent.
Os byddwch am newid, ymestyn neu ddymchwel adeilad rhestredig, bydd angen i chi gysylltu â’ch awdurdod cynllunio lleol er mwyn gweld a fydd angen i chi gael caniatâd adeilad rhestredig.