Embedded Files
For eighteen-plus years, school has been the constant. There's a bell schedule, an IEP team, a case manager who knows your child's history, and a legal guarantee — under IDEA — that services will be provided. Then, sometime between age 18 and 22, that guarantee ends. What replaces it isn't automatic, and it isn't one thing — it's a patchwork of agencies, each with its own eligibility rules, waitlists, and paperwork.
This is often called the "services cliff," and it catches even well-prepared families off guard. This guide walks through what actually changes, which agencies matter, and what to expect at each stage — so the transition feels less like falling off a cliff and more like stepping onto a bridge you helped build.
The Big Legal Shift: From Entitlement to Eligibility
The Big Legal Shift: From Entitlement to Eligibility
This is the single most important thing to understand, and it's the one thing school rarely spells out in plain language.
In K-12, special education is an entitlement. If your child qualifies under IDEA, the school must serve them — free and appropriate education, in the least restrictive environment, no exceptions, no waitlist.
After exit, adult services are eligibility-based. Every agency your student may now depend on — Regional Center, Department of Rehabilitation (DOR), Medi-Cal waivers, Social Security — requires a separate application, its own documentation, and sometimes its own waitlist. Nothing transfers automatically. Nothing is guaranteed just because your student had an IEP.
This shift is why early planning matters so much. An application started at 21 can still be pending when school services end at 22.
When Does This Actually Happen?
When Does This Actually Happen?
In California, students in an adult transition program can typically stay enrolled through age 22 (through the end of the semester in which they turn 22). Del Sol's own adult transition program serves students 18–22 who are developing vocational and independent living skills as they prepare to exit.
Exit isn't a single cutoff date most families expect — it's the end of the school year or end of the semester, not the birthday itself. That distinction matters for benefits and service timing, so confirm the exact exit date with your IEP team early, not the year it happens.
The Agencies You'll Need to Know
The Agencies You'll Need to Know
Regional Center
Regional Center
If your student has a developmental disability (autism, intellectual disability, cerebral palsy, and others), the Regional Center is usually the hub of adult services. They:
Determine eligibility and develop an Individual Program Plan (IPP) — the adult-world equivalent of an IEP, but voluntary and less legally binding
Fund and coordinate services like supported living, day programs, and transportation
Assign a service coordinator who becomes a family's main point of contact
What to expect: Regional Center eligibility should ideally be established before your student turns 18, since re-assessment as an adult can be more restrictive than the child eligibility criteria. If your student isn't already connected, start this conversation with your IEP team now.
Department of Developmental Services (DDS)
Department of Developmental Services (DDS)
DDS is the state-level agency that oversees Regional Centers and funds programs like state-operated services, employment services, participant-directed services, and home- and community-based service waivers. Families don't usually interact with DDS directly day-to-day — Regional Center is the front door — but it's useful to know DDS sets the policies your Regional Center operates under.
Department of Rehabilitation (DOR)
Department of Rehabilitation (DOR)
DOR is separate from Regional Center and focuses specifically on employment and independent living. They can fund:
Job coaching and supported employment
Vocational training and assessments
Assistive technology for work
Independent living skills services
What to expect: DOR cases open with an intake interview and an Individualized Plan for Employment (IPE) — similar in spirit to an IEP goal page, but built around a job or career outcome. Many students work with both Regional Center and DOR at the same time, since the two serve different (sometimes overlapping) purposes.
Social Security (SSI/SSDI)
Social Security (SSI/SSDI)
At 18, eligibility for Supplemental Security Income (SSI) is reassessed based on the adult disability standard, not the childhood one, and — critically — the adult standard looks at the individual's own income/assets, not the parents'. Many young adults who didn't qualify as children due to household income become eligible at 18. This application is separate from Regional Center and DOR and is worth starting months in advance.
Medi-Cal / Home and Community-Based Services (HCBS) Waivers
Medi-Cal / Home and Community-Based Services (HCBS) Waivers
These waivers fund many of the "wraparound" supports — personal care attendants, respite, day programs — that make independent or supported living possible. Waiver slots can have waitlists, so if a waiver-funded service looks like part of the plan, ask your Regional Center coordinator about timing early.
What Actually Changes Day-to-Day
What Actually Changes Day-to-Day
The team shrinks and shifts. Your case manager, speech therapist, and behaviorist are replaced by a Regional Center service coordinator who may be managing dozens of cases. Response times are often slower than families are used to from school.
Paperwork becomes an ongoing job, not a once-a-year event. IEPs happen annually on a school schedule. Adult services often require re-certification, renewed documentation, or annual plan reviews on each agency's own timeline — and those timelines don't sync with each other.
Guardianship/conservatorship becomes a real decision point. At 18, your student is legally an adult, even if their support needs haven't changed. Families have to actively decide whether to pursue conservatorship (which grants a family member decision-making authority, similar to legal guardianship for a minor) or to use less restrictive alternatives like supported decision-making, power of attorney for specific matters, or a representative payee for benefits. This is not automatic, is not required, and is not the same as leaving your child unsupported — but it does require action before the birthday, not after.
Healthcare providers change. Pediatric specialists often stop seeing patients around 18–21. Insurance coverage (whether through Medi-Cal, a parent's plan, or SSI-linked Medi-Cal) can shift too. Building a relationship with adult-medicine or adult-specialty providers before the transition, rather than during a crisis, makes a real difference.
Housing and daily structure become open questions rather than defaults. School filled a predictable chunk of the day for years. After exit, families are choosing (sometimes for the first time) among day programs, supported employment, independent or supported living, or a combination — and those choices are shaped heavily by what's funded and what has capacity.
The Emotional Side, Briefly
The Emotional Side, Briefly
Most guides skip this, but families consistently describe the transition period as one of the hardest emotional stretches since the original diagnosis. It's not just logistics — it's watching the structure and community of school disappear, often for both the student and the parent. That reaction is common, not a sign anything is being done wrong. Connecting with other transition-age families, whether through Regional Center parent groups or informal school connections, tends to help as much as any agency service does.
A Practical Timeline
A Practical Timeline
Ages 14–16 (if not already discussed): Ask your IEP team about the transition plan section of the IEP — legally required by 16, but worth raising earlier. Start learning what Regional Center eligibility looks like for adults.
Age 17, one year out: Confirm Regional Center eligibility is active or in process. Begin the SSI application conversation. Research conservatorship/alternatives and talk to an attorney or legal aid clinic if considering it — this can take months.
Age 18: Legal adulthood begins. If pursuing conservatorship, this is usually filed close to the 18th birthday. Open or confirm the DOR case if employment is a goal.
Ages 19–21: Use the remaining school years to build the adult team — tour day programs, meet Regional Center coordinators, start vocational assessments through DOR, establish an adult primary care provider.
Final school year: Confirm the exact exit date with your IEP team (end of the school year the student turns 22, not the birthday). Make sure every adult-service application that needs to be active before exit — Regional Center, DOR, Medi-Cal waiver — actually is.
Where to Start
Where to Start
If your student is enrolled in Del Sol's adult transition program, your team can help connect you to:
Department of Developmental Services and Department of Rehabilitation contacts
You don't have to have every answer before the transition starts. The goal isn't a perfect plan — it's making sure the right applications are in the pipeline early enough that your student doesn't lose momentum the day school ends.
Questions about your student's specific transition timeline? Reach out to Del Sol School
Regional Center
Regional Center
Regional centers provide assessments, determine eligibility for services, and offer case management services. Regional centers also develop, purchase, and coordinate the services in each person’s Individual Program Plan.
Department of Developmental Services
Department of Developmental Services
The California Department of Developmental Services (DDS) works to ensure Californians with developmental disabilities have the opportunity to make choices and lead independent, productive lives as members of their communities in the least restrictive setting possible. They provide the following services to help support students transitions to adulthood:
Department of Rehabilitation
Department of Rehabilitation
The California Department of Rehabilitation (DOR) works in partnership with consumers and other stakeholders to provide services and advocacy resulting in employment, independent living, and equality for individuals with disabilities. They offer:
Posted: 8/13/26
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