What You Need to Do Prior To Your Special Needs Child Turning 18 Years Old in California?

By Andrew M. Meinzer

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Estate Planning

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Last Modified on Jul 28, 2026

For many parents, a child’s 18th birthday is a celebration of adulthood and independence. And while an 18th birthday is still exciting for a family with a special needs child, it may also raise concerns about how to make sure the child is supported as an adult. If you are preparing for these changes, you are likely wondering what you need to do prior to your special needs child turning 18 years old in California.

In California, when a child turns 18, their parents lose the ability to make decisions regarding their healthcare, daily care, finances, and other important legal decisions. Depending on your child’s abilities and needs, you may need to make legal arrangements to make sure your child has the resources and support they need. Your child may benefit from:

• Supported decision-making arrangements
• Durable powers of attorney
• Advance health care directives
• Conservatorship
• A special needs trust
• Benefits planning for government disability benefits

Why You Should Hire a Special Needs Planning Lawyer Prior to Your Child’s 18th Birthday

Thinking about legal arrangements should happen before your child’s transition into adulthood. A California special needs planning attorney can help you look ahead and set up documents and legal arrangements in advance. This way, delays or legal complications do not leave your child without support, and they can have a smoother transition into adulthood.

Legal guidance is invaluable during California special needs planning cases. One in four adults in California has at least one disability, and 5% have a developmental disability. However, every child has different levels of need in different areas of their life, meaning there is no standard checklist parents can follow. A lawyer can evaluate your family’s situation and explain the specific steps you should take.

Steps to Take to Protect Your Special Needs Child After They Turn 18

When preparing for your child’s 18th birthday, consider taking the following steps to decide on the right legal plan:

• Evaluate their abilities and needs: Consider whether your child can make legal, financial, and medical decisions independently, whether they need some support, or whether they are unable to make those decisions for themselves.
• Hire a special needs planning lawyer: The next steps involve deciding between different legal options and drafting complex documents. A special needs planning attorney can help you make the right decisions for your child.
• Establish legal decision-making authority: If needed, there are several options that grant another adult, such as a parent, the authority to make decisions on behalf of, or with, a special needs adult. This can include powers of attorney, supported decision-making, or conservatorship.
• Make a healthcare plan: When your child turns 18, you may lose access to their medical information. If they need support when it comes to medical decisions, you may need to obtain HIPAA authorizations or advance healthcare directives.
• Review your estate plan: Now is a good time to review your estate plan and determine whether it still reflects your wishes. You may want to utilize tools such as a special needs trust to leave assets to your child without sacrificing their eligibility for government benefits.

What to Know About California Special Needs Planning Cases

Many special needs adults benefit from having continued legal support after childhood. As a parent, looking into these options early can help your child flourish in their adulthood.

It is important to know that there are support options available, including legal tools you and your child can establish, as well as government benefit programs. The Disability Rights California alone is projected to serve 500,000 disabled Californians through its programming.

Often, these cases involve court filings or potentially even hearings to obtain the legal authorizations or documents you need. Most documents involved in these cases are filed in the California Superior Court. However, your lawyer can provide more specific information depending on the type of filing and where you live.

FAQs

What Happens When My Special Needs Child Turns 18?

When your child turns 18, they are legally considered an adult in California. This means that you lose the automatic authority to make medical, financial, educational, and other important decisions on their behalf. This can be a difficult transition. However, special needs planning laws do allow you to use certain legal tools to continue to protect your child’s interests and safety if they are not able to make these decisions on their own.

Do You Need a Power of Attorney When Your Child Turns 18?

You do not always need a power of attorney when your child turns 18, but it may be appropriate if your child does not have the mental capacity to understand and sign legal and financial documents. A power of attorney allows your child to appoint a trusted person to help with these important legal or financial decisions.

What Is Supported Decision-Making?

Supported decision-making allows adults with disabilities to maintain their own decisions but receive guidance from trusted family members, friends, or other advisors. Supported decision-making is often used in special needs planning cases, as it can encourage healthy and informed decision-making without removing their ability to make their own choices. For many individuals, supported decision-making is less restrictive than a conservatorship.

What Government Benefits Are Available to Special Needs Adults?

Depending on several eligibility factors, adults with special needs may qualify for programs such as Supplemental Security Income (SSI), Medi-Cal, or Social Security Disability Insurance (SSDI). As a parent. You should work with a lawyer to look into what benefits your child may be eligible to receive and create a plan for applying to those programs. You may also want to look into local programs, such as vocational training, housing assistance, or educational support.

Reach Out to Meinzer Law Firm, PC

At Meinzer Law Firm, PC, we know how stressful it can be as a parent to research California’s special needs planning laws and all legal options available to you and your child. Our attorneys can make this process easier by clearly explaining the planning process and recommending legal tools based on your child’s needs. We have over 25 years of experience with special needs planning, including cases involving conservatorship, power of attorney, and other documents.

Contact Meinzer Law Firm, PC, for guidance on creating a smooth transition into adulthood and protecting your child.