The Border Control Post facility would inspect goods such as animals, plants and products of animal origin entering Wales via the Port of Holyhead.
Bydd y cyfleuster yn archwilio nwyddau megis anifeiliaid, planhigion a chynhyrchion sy’n tarddu o anifeiliaid sy’n dod i mewn i Gymru drwy Borthladd Caergybi.