Such properties would become liable for council tax at the standard rate if they do not meet the letting criteria for definition as non‑domestic property but could not be charged a premium.
Byddai eiddo o'r fath yn dod yn agored i dalu’r dreth gyngor ar y raddfa safonol os nad yw’n bodloni'r meini prawf gosod ar gyfer ei ddiffinio fel eiddo annomestig ond na ellid codi premiwm arnynt.