The Courthouse
The Benefits Math of a Separate Unit
SSI, vouchers, and state supports: how a legal address changes the arithmetic. Attorney-reviewed.
Independence, Next Door
A home of their own, fifty feet from yours.
From Greenwich to Caribou, most autistic adults live with their parents, and most of those parents are wondering what happens next. An accessory dwelling unit on the land you already own is one answer: a separate, legal home your family controls, on a timeline your family controls, that stays in the family after you are gone.
87%of young autistic adults lived with their parents after high school; only 1 in 5 ever lived independently (Drexel Autism Institute)
2,652people on Connecticut's autism waiver waiting list in April 2026, for 690 funded slots (Connecticut Public)
7.6 yearsaverage wait on Maine's Section 21 Priority 2 list for comprehensive services, December 2024 (Maine OADS data)
Every yard deserves an ADU.
From a converted garage to a detached cottage with a caregiver bedroom, every family's version of a backyard home belongs in this Ecosystem. We educate, inform and align. We do not build, and we never decide for you.
The four doors families are offered
Across New England, special education ends at or near the 22nd birthday. Then families usually hear about three options. There is a fourth, and it is the only one the family controls.
Wait
Apply for a state residential placement or a housing voucher and hold on.
- Over 600,000 people nationally on Medicaid HCBS waiting lists
- Average I/DD wait around 50 months; autism waiver around 37
- Placement location and housemates are not the family's choice
Pay
Private supported living, a purchased condo, or a staffed shared home.
- Monthly cost continues for life, with no asset at the end
- Staffing turnover is the family's problem to manage
- Out of reach for most households
Stay
Adult child stays in the childhood bedroom indefinitely.
- Living in a parent's household can reduce SSI by one third
- No practice at independence while parents are still here to help
- The crisis arrives the day a parent cannot continue
Build
A separate legal dwelling on the family's own lot, next to the people who know them best.
- Independence with support a few steps away
- A legal address that can qualify for benefits and programs a shared bedroom cannot
- A family-owned asset that outlives the parents
- Now allowed by statewide law in every New England state
What a separate legal unit changes
The ADU is not only a home. It is a legal address, and that distinction matters more than most families realize. Here is how the rules work today. Your special needs planning attorney tells you how they apply to your family.
SSI arithmetic Social Security
The 2026 federal SSI rate is $994 a month. When a recipient lives in someone else's household and gets free shelter, Social Security subtracts one third, $331.33. A separate unit with a written rent agreement at fair share is treated differently. Source: SSA, "Understanding SSI Living Arrangements," 2026 edition.
Housing vouchers Section 8 / HCV
Voucher holders generally cannot rent from a parent, but 24 CFR 982.306(d) allows it as a reasonable accommodation for a person with a disability. A parent-owned ADU that is a legal, separate unit is the vehicle for that request. Local housing authority approval is required.
State supports Six different systems
Every New England state runs its own developmental services system, and every one leans on some form of shared living or paid caregiving in a home setting. Some of that funding is tied to where and with whom the person lives. A separate legal unit, often with a caregiver bedroom, gives a family more ways to fit those rules. Your state's details are in the selector below.
The plan for after Estate and trust
A special needs trust can hold or lease the property. A sibling can become the landlord. The adult child never has to move. The ADU is the one option on this page that is still standing when the parents are not.
Read this first. Everything on this page is education, not legal, financial, benefits or medical advice. Benefit rules change (a 2026 bill to end the SSI in-kind support rule is pending in Congress), and a single misstep can cost eligibility. Before you sign anything or move anyone, sit with a special needs planning attorney and a benefits counselor. The ADU Exchange does not refer you to a specific attorney; the Courthouse lists professionals who advertise here.
Your state, side by side
Same cliff, six different landings. Pick your state to see when school ends, who runs adult services, how long the line is, what your ADU law allows, and who families there talk to first.
Massachusetts
- When school ends
- The 22nd birthday, or a regular diploma, whichever comes first.
- Who runs adult services
- Department of Developmental Services (DDS). Since the 2014 Autism Omnibus law, autistic adults without an intellectual disability can qualify, and about 5,000 adults have been found eligible on that track. Its funding pays for supports, not housing.
- How long the line is
- Autism Housing Pathways estimates 625 to 650 autistic adults a year need affordable supported housing beyond what DDS and MassHealth Adult Foster Care provide.
- What your ADU law allows
- Since February 2025, one ADU is allowed by right in single-family districts statewide, protected up to 900 square feet of gross floor area or half the main house, whichever is smaller. An unfinished basement counts toward gross floor area when it has 6 feet 8 inches of clear height. State rules (760 CMR 71) are under revision after the October 2026 comment period.
- Caregiving in the home
- MassHealth pays a stipend to a qualifying live-in caregiver through Adult Family Care (a family member who is not the legal guardian) and Adult Foster Care (a non-family caregiver). DDS also funds shared living.
- Family funding
- The Home Modification Loan Program (CEDAC) lends $1,000 to $50,000 at 0% interest, with no payments until the home is sold or transferred. It lists ADUs and sensory spaces among eligible projects. Income limits apply.
- Who families talk to first
- Autism Housing Pathways, The Arc of Massachusetts, Advocates for Autism of Massachusetts, your DDS area office.
Rhode Island
- When school ends
- The 22nd birthday, or a regular diploma. Rhode Island is where that rule started: the 2018 federal appeals ruling in K.L. v. Rhode Island Board of Education pushed the age to 22 across most of New England.
- Who runs adult services
- Department of Behavioral Healthcare, Developmental Disabilities and Hospitals (BHDDH), Division of Developmental Disabilities.
- How long the line is
- Rhode Island does not publish a waiting list figure we could verify. Ask BHDDH directly about service start times for your situation.
- What your ADU law allows
- The most direct disability ADU provision in New England. Since June 2024, state law allows one ADU by right on an owner-occupied property as a reasonable accommodation for a family member with a disability. ADUs are also by right inside an existing structure's footprint or on lots over 20,000 square feet. Size limits apply, and short-term rentals are banned.
- Caregiving in the home
- BHDDH funds shared living arrangements and self-directed supports. Rules on whether a parent can be the paid provider are specific; confirm with BHDDH.
- Who families talk to first
- BHDDH Division of Developmental Disabilities, the Rhode Island Developmental Disabilities Council, your town's zoning official about the reasonable-accommodation ADU.
Connecticut
- When school ends
- The 22nd birthday, or a regular diploma, after the 2020 federal court ruling in A.R. v. Connecticut State Board of Education.
- Who runs adult services
- Two doors. Department of Developmental Services (DDS) for people with intellectual disability. Department of Social Services (DSS) runs the autism waiver for autistic people without intellectual disability.
- How long the line is
- The longest published line in New England for autism specifically: 2,652 people on the DSS autism waiver waiting list as of April 2026, for 690 funded slots. The DDS waiting list topped 900 people in 2023.
- What your ADU law allows
- Statewide ADU law since 2021, with a municipal opt-out that many towns used. Public Act 26-7 rewrote the statute effective October 1, 2026, so check your town's current status before you plan.
- Caregiving in the home
- The autism waiver funds supports including live-in companions. DDS funds individual and family supports and shared living. Confirm whether a family member can be paid in your plan.
- Who families talk to first
- DSS Division of Autism Spectrum Disorder Services, DDS, The Arc Connecticut, the Connecticut Council on Developmental Disabilities.
New Hampshire
- When school ends
- The 22nd birthday, or a regular diploma. New Hampshire changed its law in June 2022.
- Who runs adult services
- Bureau of Developmental Services, delivered through regional area agencies. Each region has one, and it is your front door.
- How long the line is
- New Hampshire is different on paper: state law sets a 90-day standard to fund services once a need is documented, and the 2025 budget fully funded the waitlist. The real bottleneck is staff. Families report funded hours that no one is available to work.
- What your ADU law allows
- Since 2017, towns must allow one attached ADU with a single-family home. HB 1079, effective August 31, 2026, expands the rules; check your town's ordinance against the new statute.
- Caregiving in the home
- Area agencies fund shared living (often called enhanced family care) and participant-directed services where families hire their own staff. That model fits an ADU with a caregiver bedroom especially well.
- Who families talk to first
- Your area agency, Community Support Network Inc. (the area agency association), the New Hampshire Council on Developmental Disabilities.
Vermont
- When school ends
- Through age 21. Confirm the exact end date with your district, because practice varies.
- Who runs adult services
- Department of Disabilities, Aging and Independent Living (DAIL), Developmental Disabilities Services Division, delivered through ten regional designated agencies.
- How long the line is
- Vermont's issue is less a list than a shape. Shared living, where an adult lives in a contracted provider's home, is the dominant model; in 2022 parent testimony it covered about 90 percent of adults needing 24-hour support. When a provider leaves, the adult moves. A volunteer parent group, the Developmental Disabilities Housing Initiative, has spent years asking the legislature for alternatives.
- What your ADU law allows
- Vermont has required towns to allow an ADU with a single-family home for years, and the 2023 HOME Act loosened the rules further.
- Caregiving in the home
- A family-owned ADU with a caregiver bedroom can host a shared living provider on the family's land, so the provider changes and the home does not. That is the specific problem Vermont parents describe.
- Who families talk to first
- Your designated agency, the Vermont Developmental Disabilities Council, the Developmental Disabilities Housing Initiative.
Maine
- When school ends
- The 22nd birthday, or a regular diploma. Maine raised the age from 20 in 2021 and wrote it into law in 2023.
- Who runs adult services
- Office of Aging and Disability Services (OADS), through MaineCare Section 21 (comprehensive, including residential) and Section 29 (support services) waivers. A new Lifespan waiver is being phased in.
- How long the line is
- The starkest numbers in the region. 2,524 people were on the Section 21 waitlist on March 31, 2026, and 73 percent of them had no other waiver coverage while waiting. Average waits on Priority 2 and 3 lists were 7.6 and 6.4 years in December 2024.
- What your ADU law allows
- Statewide ADU law since 2022 (LD 2003), amended in 2023 and 2025, with state rules still being finalized. Check your town's current ordinance.
- Caregiving in the home
- Section 29 funds home and community supports for people living with family, and Section 21 includes shared living. With waits measured in years, families are often the support plan by default.
- Who families talk to first
- OADS, the Maine Coalition for Housing and Quality Services, the Maine Developmental Disabilities Council.
State figures come from state agencies, legislatures and public reporting, dated where shown, and checked October 2026. Programs change; confirm with the agency before relying on any figure.
The family housing planner
Nine steps, in the order that saves families the most money and the most regret. Print it, work it with your family, bring it to your first meetings.
- Start with the person, not the building.Daily support needs, sensory needs, routines, what independence looks like for them in five years. Ask them. Write it down.
- Get the benefits picture on paper.SSI or SSDI status, MassHealth or state Medicaid, DDS or counterpart eligibility, voucher applications already filed. You cannot plan a rent agreement without this.
- Meet a special needs planning attorney before an architect.Trust structure, who owns what, who pays what, and how the unit is held after the parents. This decision shapes the design.
- Run the Feasibility Check for your town.Lot, setbacks, septic or sewer, size allowed under your state law, and your town's own requirements.
- Decide the design brief with support in mind.Second bedroom for a caregiver, no-step entry, acoustic separation, durable finishes, lighting that can be dimmed, secure but not locked-in egress, a kitchen scaled to the person's skills.
- Price it honestly.A New England ADU is a one-time capital cost, commonly in the low to mid six figures depending on type and site. Get three estimates. Compare it to a lifetime of monthly payments, not to zero.
- Line up the money.Home equity, renovation or construction loans, reverse mortgage for older parents, state home modification loan programs where they apply. Talk to a lender who has worked with a trust.
- Build the support plan alongside the building plan.Who checks in, how often, what the backup is. A home without a support plan is a bedroom with a longer walk.
- Write down what happens after you.Letter of intent, trustee, successor landlord, where the money comes from. Then review it every year.
Articles for this program
Written for The ADU Exchange University and filed with the department each one belongs to.
Homeowners
The Transition Cliff
What happens to autistic adults after school services end, by the numbers, and why the backyard is part of the answer.
The Courthouse
Who Owns the ADU?
Trusts, ABLE accounts, estates, and the question of who is the landlord after the parents.
Trades & Services
Designing for Support
The caregiver bedroom, acoustics, entries, and finishes, written with a designer and an occupational therapist.
Homeowners
What Happens When We Are Gone
The plan families avoid writing, and the one document that makes everything else work.
The Courthouse
Whose Name Goes on the Deed?
Settle ownership before the floor plan. It matters even more when the plan has to outlive the parents.
Homeowners
The Launch Pad
One in three young adults lives at home. How the backyard changes what that means.
Start your family's plan
Tell us where you are. We reply from our office with next steps for your state, the printable planner, and the professionals in this Ecosystem who work on family-supported ADUs. No pressure, no sales call unless you ask for one.
- We do not ask about anyone's diagnosis, and we never will.
- Your message goes to info@theaduexchange.com only.
- Partner organizations and advocacy groups: use the same form and tell us who you are.
Thank you. Your message reached our office. Expect a reply within two business days.
Who we are learning from
This program is built with families, self-advocates, and the organizations that have worked on supported housing in New England for years. Partner names appear here only with their permission. If your organization wants to collaborate on education or a workshop, use the form above.
The ADU Exchange is an education and connection platform. It does not build, permit, or construct ADUs, and it is not a lawyer referral service. Nothing on this page is legal, financial, benefits, tax or medical advice. Statistics are drawn from the Drexel Autism Institute, KFF, the Social Security Administration, the Massachusetts Department of Developmental Services, and Autism Housing Pathways, and are current as of October 2026; state figures also draw on Connecticut Public, Maine OADS, the Vermont and New Hampshire legislatures, and the Rhode Island General Laws. We use "autistic adults" and "adults with autism" interchangeably, respecting that people in this community hold different preferences.