Is participation in a homeowners' association for land on which buildings were constructed without a permit permissible or forbidden, knowing that the government imposes fines and then issues building permits after they are paid?

Building on land where the law prohibits it should not be undertaken, because these laws aim to regulate public interest, and adherence to them is obligatory. As for someone who proceeded with building, paid the fine, and established their ownership, there is no impediment to selling it or including others in its ownership.