John Russell Brown and his company Hyperion Investments face 16 charges relating to the condition of the property and the danger and risk to health of the occupants in it.
The migrants were found during a raid on Deeside Lane, Sealand - one of the largest of its kind in the country.
Magistrates in Wrexham adjourned the case until 10 December.
A man has appeared in court after 107 migrants were found crowded into a building in Flintshire.