How Does a Trust Protect Your ADU Investment from Nursing Home Claims?

By Buz Artiano, BuildX | March 2026

Watch: Elder Law Secrets, Special Needs Trusts & Condo-izing ADUs: Patrick Kelleher | BuildX Podcast #31

You're about to invest $300,000 or more in an ADU for your family. You've done a bunch of research, you've crunched the numbers, and talked to some builders. But what you really want to know is what happens to that investment if you or your spouse ends up in a nursing home? In Massachusetts, nursing home costs are about $18,000 per month. Without the right legal protection, Medicaid can come after your home and your ADU to cover that. So it's definitely a legitimate cause for concern. It's the number one legal concern we hear from families who are thinking about building an ADU on the South Shore and across southeastern Massachusetts.

My name is Buz Artiano, and I am the founder of BuildX. We've built dozens of ADU projects across Massachusetts, mostly around the South Shore and Plymouth County areas. We are the only team you need, we handle design, permitting, and construction. So we see every phase of a project from the first site visit up until you move in. We deal with septic constraints, zoning issues, and the state's new ADU laws. But building the ADU is only half the job. The other half is making sure your family is protected after the project is done. That's why we work with elder law professionals to help families understand what's at stake before they start building.

This article is going to walk through several things. The role that trust planning will play in your ADU project, what the five-year Medicaid lookback period means for your property, why the timing of your trust matters even more than the trust itself, and how families in Massachusetts are protecting significant investments like ADUs from nursing home claims. The information we are going to share with you comes from our experience building for families in exactly this situation and from the advice of elder law attorneys who specialize in Massachusetts asset protection.

How Does the Five-Year Medicaid Lookback Affect Your ADU?

Medicaid uses a five-year lookback period to review asset transfers before deciding if they will cover your long term care. If you transferred your home into a trust within that five-year window and then you end up needing nursing home care, Medicaid can penalize you and choose to not cover your care for a certain period of time, which means you would be responsible to pay for it out of pocket.

Here's where ADU families get caught. The ADU is on the same property as the main house, so if you build a $300,000 ADU on a property that started out worth $700,000, now you've got a million-dollar asset. If that property was never transferred into a trust, or was transferred too recently, the entire value of the property could be at risk.

We interviewed Patrick Kelleher on our podcast, he's an elder law attorney with 23 years of experience in the Plymouth area. He told us that when mom and dad transfer their primary residence into a trust, the ADU comes along for the ride. The ADU is tied to the deed, it's not a separate asset. That means the trust protects the home and the ADU, but only if the transfer happened outside that 5 year window.

It's not as complicated as it sounds. If you're over 55 and considering an ADU, the trust conversation needs to happen before you start construction. Starting that five-year clock early is the most important thing you can do to protect your investment.

Why Is a Will Not Enough to Protect Your ADU from Nursing Home Costs?

A lot of people think that having a will is sufficient estate planning. It's absolutely not, especially when a six-figure ADU investment is involved. A will only says what happens to your assets after you die, but it doesn't do anything to protect them while you're alive. A will doesn't shield your property from Medicaid and it doesn't keep you out of probate court. A will also doesn't give you any protections against Massachusetts estate tax.

We have a lot of experience building for families in South Shore, and unfortunately about 70 to 80 percent of homeowners don't have any kind of estate plan in place when they start talking to us about an ADU. Sometimes they have a will, but a lot of times they have nothing at all. Either way, they are at risk.

A trust, on the other hand, is a legal entity that holds your property on behalf of your beneficiaries. When your home and ADU are in a legal trust, they're no longer considered your personal assets for Medicaid purposes, as long as that five-year lookback period has passed. The trust also means your family doesn't have to deal with probate court to gain control of your assets after you pass.

The difference between a will and a trust for ADU families is that a will is just a set of instructions, but a trust is a structure that protects your property while you're still alive. For a family investing $250,000 to $350,000 in an ADU, that protection is not optional.

What Is the "Four-Headed Monster" That Threatens Your ADU Investment?

Elder law attorneys say there are four things that can threaten your assets. We call this the four-headed monster, and every ADU family in Massachusetts should understand all four of them.

Probate court. Without a trust, your property goes through probate when you die. Probate is a public court, and it's very time-consuming, not to mention expensive. Your family can't keep, sell, or manage the ADU until the court process is all finished.

Massachusetts estate tax. Massachusetts is one of 12 states that imposes its own separate estate tax, and the threshold is $2 million. If your total estate, including your home, ADU, retirement accounts, life insurance, and any investments, adds up to more than $2 million, your family could owe the state a couple hundred grand. Adding a $300,000 ADU to a property you already own free and clear can push you over that line. Current threshold details are available at mass.gov.

Creditors and predators. Without a trust, your property is exposed to lawsuits, judgments, and financial claims from third parties. A trust puts a legal wall between your creditors and your home.

Nursing home costs. At $18,000 per month in Massachusetts, a nursing home stay can consume hundreds of thousands of dollars in equity in just a couple years. This is the big one that we get calls about a lot.

We walk families through all this because it changes the way they think about their ADU project. The construction is an investment, but the trust is what protects it. You need to have both if you want to be protected.

Why Should You Create the Trust Before You Build the ADU?

The mistake we see people make the most often is building the ADU first and thinking about legal protection later. But by then, they've added $250,000 to $350,000 in value to their property, started the Medicaid 5 year clock with an even bigger investment to protect, and lost years that could have counted toward that five-year lookback.

We evaluate trust timing the same way we evaluate septic and permitting: it's always a decision to make before construction starts. On our projects, we encourage families to sit down with an elder law attorney before we even finalize the design. The reason is because if the property needs to be transferred into a trust, you should do the transfer before the ADU adds more value to the property. Transferring a $700,000 property into a trust is usually not complicated, it's an easy process. But transferring a $1,000,000 property with a brand-new ADU built on it can raise questions, require more documentation, and start the lookback clock with a higher value to protect. People save themselves years of complicated and frustrating legal proceedings by having one conversation with an attorney before the build starts.

The ideal order for an ADU project involving trust planning is:

First, consult with an elder law attorney to evaluate your estate and determine whether a trust is for sure the right move. Second, if a trust is recommended, make sure that is all taken care of before construction starts. Third, begin the ADU design and permitting process with BuildX. Fourth, go ahead with the build now that you are confident that your investment is protected.

Doing it in this order doesn't add anything to the cost. It just puts the legal work ahead of the construction work, which is where it belongs.

What Happens If You Need Nursing Home Care Before the Five Years Are Up?

That's the million dollar question, and it deserves an honest answer. If you transfer your property into a trust and then need nursing home care within the five-year lookback period, Medicaid will review the transfer. Depending on the value of the home and ADU, Medicaid can penalize you for a period of time where they won't cover any of your nursing home costs. During that penalty period, you have to pay the full amount of the nursing home costs out of pocket.

There's no shortcut and no way around that five-year rule. That's why timing matters more than anything. Every year you wait to create the trust is another year that you could end up being responsible to pay for your care out of pocket.

If you're in this situation you've got some options. Some people use long-term care insurance to bridge the gap during that 5 year period. Others work with their elder law attorney to make plans for crisis management, which are legal but more complicated and more expensive than pre-planning with a trust. The most important thing to remember if you want to be successful in this whole process is to start planning early.

Patrick Kelleher told us bluntly to do it in the third quarter of life. Don't wait until the fourth quarter, because you never know if you will run out of time. His own father became incapacitated after a fall at home, was taken to the hospital, then to a rehab facility, and eventually to a nursing home. That series of events can happen to anyone, and it happens fast.

Is Trust Planning the Right Move for Every ADU Family?

No. And we wouldn't be doing our job if we told you otherwise.

Trust planning involves legal fees, a loss of direct control over your property (the trustee manages it, even if you stay living there), and a five-year waiting period before you're fully protected. For younger families building an ADU for rental income, the nursing home issue is a long way away, and a trust may not really be a pressing issue. For families with estates that are well below the $2 million threshold, the estate tax concern shouldn't really be an issue.

We encourage every family considering an ADU to consult with an elder law attorney, not because we think everyone needs a trust, but because the stakes are too high to lob a guess. You need real information specific to your situation. A one-hour consultation with an attorney can tell you whether you need trust planning or not. If it is, you'll be glad you started early. If it's not, you'll have peace of mind either way.

But whatever you do, please don't ignore the subject entirely. Building an ADU without understanding the legal implications is like building a house without checking the septic. You might be fine, but if you're not, the cost of fixing it later is so much higher than the cost of getting it right from the start.

Your ADU Is an Investment. Make Sure It Is Protected.

A trust doesn't make your ADU project more complicated, it makes it more secure. The families who protect their ADU investments from nursing home claims are the ones who plan before they build, start the five-year clock early, and work with professionals who understand both the construction and the legal side of ADU ownership in Massachusetts.

If you are considering an ADU and want to understand how trust planning fits into the process, we are here to help you think through it.