GOV.WALES uses cookies which are essential for the site to work. Non-essential cookies are also used to tailor and improve services. By continuing to use this site, you agree to our use of cookies.
Definition: Achos o adfer rheolaeth adeiladu i awdurdod lleol, pan na fydd arolygydd cymeradwy y tu allan i'r awdurdod mewn sefyllfa i barhau i arolygu'r gwaith.