Mae pobl yn cael eu hannog i fynegi barn am newidiadau posibl i drethi lleol y gallai awdurdodau lleol eu defnyddio i ddelio ag effaith niferoedd mawr o ail gartrefi a llety gwyliau masnachol mewn rhannau o Gymru.
Views are being sought on potential changes to local taxes which could be used by local authorities to tackle the effects that large numbers of second homes and commercial holiday lets can have in some parts of Wales.