Moving the property into an LLC triggers the due-on-sale clause, full stop. A living trust is the one narrow exception, and it only protects the original owner. Federal law (the Garn-St Germain Act) bars a lender from calling the loan due when the home transfers into a living trust in which the borrower is and remains a beneficiary and the rights of occupancy do not change. An LLC is nowhere on the exception list, so that transfer hands the lender the right to demand the full balance. Wrapping a subject-to purchase inside either structure to hide it from the lender does not change what the transfer actually is. On subject-to deals more broadly, understand where the real risk sits. Lenders track who holds title. They rarely call a loan due while payments are current, but they move quickly toward foreclosure the moment a payment is missed, and the seller stays on the hook for that underlying loan the entire time the buyer holds the property. We have bought a few homes subject-to ourselves, always to renovate and resell within months, never to hold long term. We have also seen a small community bank call a subject-to loan due purely as a matter of policy after spotting the title change. This is legal territory. Get a real estate attorney involved before you structure anything, and treat any plan that depends on the lender not noticing as a plan that fails the honesty test.