Ym mis Ebrill 2023, cafodd awdurdodau lleol y pwerau i gyflwyno premiymau treth gyngor dewisol uwch ar ail gartrefi ac eiddo gwag hirdymor - hyd at 300%.
From April 2023, local authorities have had the powers to introduce higher discretionary council tax premiums on second homes and long-term empty properties – up to 300%.