Picture the moment. The family has agreed to build an ADU so Mom and Dad can live close by. The layout is taking shape and the budget conversation has started. Then someone asks the question nobody prepared for: whose name goes on the deed?
That single question pulls in mortgage terms, MassHealth eligibility, estate planning, and family dynamics all at once. It is rarely raised early, and it is exactly the kind of decision that can turn a major family investment into a source of conflict if a divorce, an inheritance dispute, or a long term care application arrives later.
The ADU Exchange does not build ADUs and does not practice law. Our role in the Ecosystem is to connect, equip, and guide families before they sign anything. This article explains the four ownership structures Massachusetts families most often discuss with their attorneys, so you can walk into that legal conversation informed rather than starting from zero.
The Short Version
There is no single right answer. For families with stable relationships, joint ownership on the deed is usually the first structure to discuss: the parent contributes funds and receives a proportional share of the property in return. Because the parent receives value for their money, this may avoid the gift treatment that triggers Medicaid look-back scrutiny, though MassHealth reviews the specifics of every transfer.
The alternatives are a recorded lien or promissory note, a life estate, or a trust. Each protects against different risks and creates others. Before you finalize a floor plan, apply for permits, or sign a construction contract, have an elder law attorney review your family's specific situation.
Why the Deed Comes First
How the property is titled affects the mortgage, the homeowner's insurance, potential property tax treatment, the parent's eligibility for benefits, and everyone's estate plan. Families who resolve this question before design work begins give themselves time to consult attorneys and record documents without holding up permits. Families who leave it for last often face a scramble right when the project should be moving.
The Four Structures
Joint Ownership on the Deed
The parent contributes toward the project, and in exchange, all parties go on the deed together with ownership shares that reflect what each contributed. The document itself is straightforward: a deed listing each owner and their share.
Why families start here. When a parent buys an ownership stake rather than giving money away, the transaction is an exchange of value, not a gift. That distinction matters for MassHealth, which applies a five year look-back to asset transfers when someone applies for nursing home coverage. A properly documented purchase of equity is a different animal than a gift, though how any specific transfer is treated depends on the facts, which is exactly what an elder law attorney evaluates.
The risks. Three deserve attention:
- The mortgage due-on-sale clause. Most residential mortgages let the lender demand full repayment if ownership of the property changes. Adding a parent to the deed can technically trigger it. Enforcement against owner-occupied, within-family transfers is widely regarded as uncommon, but the clause is real, so your attorney should review your specific mortgage terms before any transfer is recorded.
- Divorce. If the couple on the deed separates and the property must be sold, the parent recovers their proportional share of the proceeds. Financially they are made whole in proportion to their stake, but they lose the home itself. For a parent in their eighties or nineties, a forced move is a serious harm even with the money returned.
- Massachusetts estate tax. Massachusetts taxes estates valued above $2 million. If the parent's total estate, including their share of the property, crosses that line, the family has planning to do. The federal exemption is far higher, so for most families this is a state-level question. Confirm current thresholds at mass.gov.
A Recorded Lien or Promissory Note
Instead of going on the deed, the parent contributes funds in exchange for a lien recorded against the property, often paired with a promissory note. Like a mortgage, the lien gives the parent a legal claim to be repaid if the property sells.
The upside. Simplicity and separation. The parent never appears on the deed, so the due-on-sale question never arises. If the couple divorces, the recorded lien survives and travels with the property.
The tradeoff. A lien is a claim, not control. The parent has no say over refinancing, sale decisions, or what happens to the property. If the owners refinance heavily or the property sells at a loss, the lien may not be paid in full. And how a note arrangement is treated for Medicaid purposes depends entirely on how it is structured, which again puts an elder law attorney at the center of the decision.
A Life Estate
A life estate gives the parent a recorded legal right to live in the property for the rest of their life, regardless of who holds title. A new owner, a divorce settlement, or most changes in circumstance cannot force the parent out while the life estate stands. Versions range from a full life estate, with broad rights to use the property, to a narrower right of occupancy limited to living there.
The upside. This is the strongest protection for the thing many elderly parents care about most: the guarantee that they will not have to move.
The tradeoffs. Creating a life estate changes how the property is owned, so it raises the same mortgage due-on-sale question as joint ownership. Life estates also carry their own specific treatment under Medicaid rules that differs from an outright transfer, and the details of that treatment depend on how the arrangement is set up. This is a structure to design with an elder law attorney, not from a template.
A Trust
A trust holds the property, or a share of it, for the benefit of named people. Structured well, trusts offer the broadest protection against creditors, divorce claims, and estate disputes. They are also the most expensive and complex option, with attorney fees to establish and ongoing obligations to maintain.
The tradeoffs. A trust that owns a share of a property still just owns a share; the underlying risks that come with co-ownership do not vanish, they become harder to reach. And for Medicaid planning, an irrevocable trust generally requires the parent to permanently give up access to the money they contributed, which is a heavy commitment for someone who may need those funds for future medical costs. Many elder law attorneys steer families toward simpler structures unless the situation genuinely calls for a trust.
The Four Structures Side by Side
| Factor | Joint Deed | Lien / Note | Life Estate | Trust |
|---|---|---|---|---|
| Medicaid look-back exposure | May be avoided if structured as a purchase of equity; facts matter | Depends on structure | Distinct treatment; structure dependent | Irrevocable trusts face the five year look-back |
| Mortgage due-on-sale risk | Yes, though enforcement is uncommon in practice | No | Yes | Depends on structure |
| If the couple divorces | Parent recovers their share but can lose the home | Lien survives but may not be fully paid | Right to occupy survives | Similar exposure to joint ownership |
| Parent's control | Full ownership rights | Claim only, no control | Right to occupy only | Varies by trust terms |
| Cost to set up | Low | Low | Moderate | High, with ongoing maintenance |
| Complexity | Simple | Simple | Moderate | High |
Most families in ordinary circumstances start the conversation at joint ownership and move down the list only if their situation demands it. Complicated family history, a marriage under strain, or a parent who may need long term care within five years all point toward discussing the alternatives seriously.
One Family, Two Attorneys
This is the step families most often skip. The parent and the adult children have different interests, different risks, and different goals, and one attorney cannot ethically represent both sides of the same transaction.
The parent's attorney works to protect the parent's investment, benefit eligibility, and right to stay in the home. The children's attorney works to protect the mortgage, the couple's equity, and their own estate plan. Both sets of concerns are legitimate. They are not always aligned, and that is precisely why each side needs its own counsel. The children carry real exposure too: if a parent on the deed passes away, the mortgage picture and the property tax picture can both change, and those consequences are far easier to plan for in advance than to untangle afterward.
Before you draw anything: sit down with an elder law attorney who understands ADU planning in Massachusetts, and encourage your parents to retain their own. Do it before the floor plan is final, before permits, and before any construction contract. If your situation is simple, the legal work will be simple and inexpensive. If it is complicated at all, this is the best money you will spend on the entire project.
The Deed Decision Is the Foundation
The ownership structure touches your mortgage, your taxes, your parents' benefit eligibility, and the relationships this project is supposed to serve. Settled early, it quietly protects your family for decades. Skipped, it leaves a six figure investment sitting on an unanswered question, and that is a large enough number to strain almost any family.
Disclaimer: The ADU Exchange is an education and connection platform, not a law firm, and nothing in this article is legal, tax, or financial advice. Medicaid rules, MassHealth policies, estate tax thresholds, and mortgage terms change and vary by situation. Consult a licensed Massachusetts elder law attorney before making any ownership, transfer, or construction decision. This article is published as part of the South Shore Home Options Campaign in collaboration with South Shore REALTORS®.