If your developmentally or intellectually disabled child is approaching their 18th birthday on Long Island, the legal tool you are most likely looking for is a guardianship under SCPA Article 17-A, filed in the Nassau County Surrogate’s Court. When a child turns 18, the law treats them as a legal adult — even if their disability means they cannot make medical, financial, or daily-living decisions independently. SCPA 17-A lets a parent (or another qualified person) be appointed as guardian of the person and/or property of an “intellectually disabled” or “developmentally disabled” adult, so you can lawfully continue making those decisions and protecting your child. This article explains how 17-A works on Long Island, how it differs from adult Article 81 guardianship, and the alternatives a court will expect you to consider first.
Why You Need a New Legal Authority at Age 18
Before age 18, a parent has automatic legal authority over a minor child — to consent to medical care, manage benefits, and make decisions. The day your child turns 18, that authority ends as a matter of law, regardless of your child’s actual abilities. Schools, doctors, and benefit agencies can suddenly refuse to share information or accept your decisions. A court-ordered guardianship restores your ability to act on your adult child’s behalf.
For families of children with conditions such as autism, Down syndrome, cerebral palsy, or significant intellectual disability, families often begin the 17-A process in the months before the 18th birthday so the order is in place when it is needed.
SCPA 17-A vs. Article 81: Which Track, Which Court
This is the single most important thing to get right. New York has two very different adult guardianship statutes, and they are heard in two different courts.
| Feature | SCPA Article 17-A | MHL Article 81 |
|---|---|---|
| Who it covers | A person who is intellectually or developmentally disabled (often a child turning 18) | An adult who has become incapacitated (injury, illness, dementia, etc.) |
| Court | Surrogate’s Court (Nassau County Surrogate’s Court for Long Island residents in Nassau) | Supreme Court of the county where the alleged incapacitated person resides — not Surrogate’s Court |
| Standard | A more plenary standard based on a certified diagnosis of disability | Clear and convincing evidence of incapacity, narrowly tailored |
| Scope of powers | Broad guardianship of the person and/or property | The least restrictive intervention tailored to actual needs |
To be clear: adult Article 81 guardianship of an incapacitated person is filed in the Supreme Court, never in the Surrogate’s Court. SCPA Article 17-A (developmental disability) and SCPA Article 17 (guardianship of a minor) are the tracks that belong in Nassau County Surrogate’s Court. Choosing the wrong statute or the wrong court can cost your family months. For a fuller comparison, see our Article 81 Guardianship overview and our Guardianship Overview.
If your child is still under 18, the relevant track is guardianship of a minor under SCPA Article 17 — see Guardianship of Minors.
The SCPA 17-A Process in Nassau County Surrogate’s Court
While every case is unique, the path through the Surrogate’s Court generally follows these steps:
- File the petition. A parent, or two qualified petitioners, file a verified petition in the Surrogate’s Court of the county where your adult child resides (Nassau County for much of Long Island).
- Medical certifications. SCPA 17-A requires certifications from qualified professionals — typically a physician and a psychologist, or two physicians — confirming the developmental or intellectual disability.
- Notice. Required parties (the disabled person, certain relatives, and any facility) receive legal notice of the proceeding.
- Guardian ad litem / court review. The court may appoint a guardian ad litem to protect the interests of the person who is the subject of the petition.
- Hearing and decree. The Surrogate reviews the petition and certifications, holds a hearing if needed, and — if the standard is met — issues letters of guardianship of the person and/or property.
Do not rely on quoted filing fees or court addresses from blog posts; confirm the current fee schedule and filing location directly with the Nassau County Surrogate’s Court or your attorney before you file.
What a 17-A Guardian Can — and Must — Do
A 17-A guardian of the person can make decisions about medical care, residence, education, and daily life. A guardian of the property can manage money, benefits (such as SSI), and assets. The court can appoint the same person for both roles, or split them.
Guardianship carries ongoing duties. While 17-A reporting is generally less intensive than Article 81’s annual-report regime, a guardian is still a fiduciary who must act in the disabled person’s best interests, keep their funds separate, and answer to the court. (By contrast, an Article 81 guardian must file an initial report within 90 days, file annual reports, and visit the incapacitated person at least four times per year.) For a deeper look at fiduciary obligations, read Guardian Duties.
Consider the Alternatives First
New York courts strongly prefer the least restrictive option, and a well-prepared petition shows you have considered alternatives to a full guardianship. Depending on your adult child’s level of functioning, these may be appropriate:
- Durable Power of Attorney under GOL §5-1513 — if your child can understand and sign it, this lets them appoint you to handle financial matters without a court case.
- Health Care Proxy — appoints an agent to make medical decisions.
- Supplemental (Special) Needs Trust — protects assets and gifts without disqualifying your child from means-tested benefits like Medicaid and SSI.
- Living Trust — for managing property.
- Supported Decision-Making — a less restrictive arrangement in which the person keeps legal authority but receives structured help from trusted supporters.
A capacity that allows a valid Power of Attorney can sometimes avoid guardianship altogether. Explore these on our Alternatives to Guardianship page. Where family members disagree about who should serve or whether guardianship is needed, see Contested Guardianship.
Frequently Asked Questions
Is SCPA 17-A filed in Surrogate’s Court or Supreme Court on Long Island?
SCPA Article 17-A guardianship of a developmentally disabled adult is filed in the Surrogate’s Court (Nassau County Surrogate’s Court for Nassau residents). Adult Article 81 guardianship of an incapacitated person is filed in the Supreme Court — a different court and a different statute.
When should we start the process before my child turns 18?
Many Long Island families begin a few months before the 18th birthday so that letters of guardianship are in place when parental authority ends. Starting early also allows time to obtain the required medical certifications.
Can both parents serve as co-guardians?
Yes. The Surrogate’s Court can appoint co-guardians, and can also name a standby or successor guardian to take over if the primary guardian can no longer serve.
Will a 17-A guardianship affect my child’s SSI or Medicaid?
Guardianship itself does not disqualify your child from benefits, but how property is held matters. A Supplemental Needs Trust is often paired with guardianship to preserve eligibility.
Speak With a Long Island Guardianship Attorney
Protecting a disabled adult child is one of the most important steps a parent on Long Island can take. The choice between SCPA 17-A, Article 81, and non-guardianship alternatives — and getting your filing into the correct court — has real consequences for your family. Russel Morgan, Esq. and the team at Morgan Legal Group guide Long Island families through every step.
Schedule a confidential 30-minute consultation: https://calendly.com/russel-morgan/30min
Further reading from Morgan Legal Group: understanding New York guardianship.