The remaining second homes and long-term empty properties are either in authorities which have chosen not to apply a premium or are in one of the classes which cannot be charged a premium.
Mae gweddill yr ail gartrefi ac eiddo gwag hirdymor naill ai mewn awdurdodau sydd wedi dewis peidio â chodi premiwm neu yn un o'r dosbarthiadau na ellir codi premiwm arnynt.