The general rule is statutory:
Where an owner or occupier of land, by express or implied invitation, induces or leads others to come upon his premises for any lawful purpose, he is liable in damages to such persons for injuries caused by his failure to exercise ordinary care in keeping the premises and approaches safe.

Extent of owner/occupier’s duty:
The owner or occupier of premises owes his invitee the duty of ordinary care in keeping the premises and approaches safe. This is generally a nondelegable duty, so unless the owner has fully surrendered control of the premises to an independent contractor, the fact that injury results from the contractor’s negligence will not insulate the owner from liability.