How to Adopt Your Stepchild in California: Forms, Costs, and Hearing

To adopt your stepchild in California, you file a petition in your county’s Superior Court, secure written consent from the child’s other biological parent (or ask the court to proceed without it), complete a court-ordered investigation, and attend a hearing where a judge decides whether the adoption serves the child’s best interests. When the other parent cooperates, many families move from filing to final order in a few months. When they don’t, the case becomes considerably longer and more expensive.

Who Can File

California Family Code Section 9000 limits the stepparent process to people legally married to, or in a registered domestic partnership with, the child’s legal parent at the time of filing. The child must be under 18.¹

California generally requires adopting parents to be at least ten years older than the child, but for stepparent adoptions the court can waive that age gap entirely if the adoption is in the best interest of the child and the public.²

One narrower path sits alongside the standard process: if you and your spouse or partner had a child together through assisted reproduction or gestational surrogacy, a confirmatory adoption confirms parentage that already exists under California law and typically requires no investigation or court hearing.³ Everything below applies to the ordinary case: adopting a child who is not biologically yours.

Getting the Other Biological Parent’s Consent

Family Code Section 9003 requires the other biological parent to sign a written consent, and that signature has to happen in front of a notary, court clerk, probation officer, court investigator, or county welfare department staff member.¹ A phone call or informal agreement doesn’t satisfy the requirement. When the other parent cooperates, you can coordinate the signed consent early and avoid the most time-consuming part of a contested case.

If the other parent’s rights have already been terminated by a court, or if that parent is deceased, you’ll provide a certified court order or death certificate showing why consent is unnecessary.

When the Other Parent Won’t Sign or Can’t Be Found

A refusal doesn’t automatically block the adoption. Under Family Code Section 7820, you can ask the court to declare the child free from that parent’s custody and control, which opens the door to proceeding without consent. Abandonment is the most common basis.

Under Family Code Section 7822, a parent who has left a child in the care of the other parent for one year without providing any financial support or communicating with the child is presumed to have intended abandonment. If both parents left the child with someone else, the threshold drops to six months. The failure to support or communicate is itself treated as evidence of intent to abandon.⁴

Expect the court to scrutinize the timeline closely. Sporadic contact or token support payments can undermine the presumption. You’ll need to document the gap, including the absence of calls, visits, cards, and child support payments, and the court will evaluate whether the parent’s absence was truly voluntary. This scenario often benefits from an attorney’s help, because a contested termination of parental rights is a full adversarial proceeding, not an add-on to your adoption petition.

Forms You File

Three Judicial Council forms form the core of the petition:

ADOPT-200, the Adoption Request, which carries your information, the child’s birth details, your relationship to the child, and any name change you’re requesting.
ADOPT-210, the Adoption Agreement, signed by you and by the child. Under Family Code Section 8602, a child age 12 or older must consent, so the child’s signature is legally required at that age.
ADOPT-215, the Adoption Order, which the judge signs if the adoption is granted. You prepare it in advance and include it in your filing package.

All forms should be typed to avoid processing delays at the clerk’s office.⁵ Supporting documents go in with the petition: a certified copy of your marriage certificate or domestic partnership registration, the child’s original birth certificate, and either the signed consent or the court orders, death certificate, or records of non-contact that explain its absence.

The ICWA Inquiry

Federal law and California court rules require every adoption petition to include an inquiry about whether the child is or may be an Indian child under the Indian Child Welfare Act. You complete form ICWA-010(A) and attach it to your petition. At the first court appearance, the judge will order each parent or guardian present to fill out form ICWA-020, which asks about the child’s possible Native American heritage. If the child does have tribal connections, additional notice requirements and protections apply that can significantly change the process. ICWA violations can be grounds for invalidating a completed adoption even years later.⁶

The Court Investigation

Family Code Section 9001 requires an investigation before any stepparent adoption can be finalized. The court assigns the job to a court investigator, county social worker, or licensed adoption agency, and their task is to determine whether the adoption genuinely serves the child’s best interests.¹

The investigator will typically visit your home, interview you and your spouse or partner, and may speak with the child depending on age. They’re looking at the stability of your household, the quality of your relationship with the child, your ability to provide financially, and the circumstances surrounding the other biological parent’s consent or absence. If the child is old enough to express a preference, that carries weight.

Everything goes into a written report with a specific recommendation to approve or deny. Judges rely heavily on this report, so take the home visit seriously. The investigator is not looking to catch you out; the goal is to confirm that formalizing an existing family bond makes sense for the child.

What It Costs

The court filing fee is $20 per child.⁷ On top of that, you’re responsible for the cost of the mandatory investigation, which is capped at $700 under Family Code Section 9002. The court can defer, waive, or reduce the investigation fee if paying it would cause economic hardship that would hurt the child’s welfare.¹

If the other biological parent contests the adoption and you need to pursue termination of their parental rights, attorney fees become the largest expense by far, easily several thousand dollars depending on complexity. Uncontested cases where the other parent signs consent are dramatically cheaper, and many families handle the paperwork themselves using the court’s self-help resources.

The Hearing and the New Birth Certificate

Once the investigation report is filed, the clerk schedules a hearing. You, your spouse or partner, and the child typically attend. The judge reviews the ADOPT-200 petition and the investigator’s report, confirms that all legal requirements are met, and if satisfied signs the Adoption Order (ADOPT-215). You are legally the child’s parent from that moment forward.⁵

After the judge signs, the court clerk processes the decree and sends it to the California Department of Public Health. CDPH then creates a new birth certificate listing you as a parent, reflecting any name change requested during the process. You’ll receive a certified copy of the new certificate at no additional cost when the adoption is registered.⁸

What Changes Once the Order Is Signed

Once that order is signed, the legal distinction between you and a biological parent disappears. You gain full parental rights, and you also take on every obligation that comes with them.

Child Support Survives Divorce

If your marriage or domestic partnership ends, you can be ordered to pay child support for your adopted child just like any biological parent. Courts don’t distinguish between biological and adoptive parents when calculating support. This is the fact that catches the most stepparents off guard: the legal relationship with the child outlasts the relationship with your spouse.

Inheritance, Insurance, and Social Security

Your adopted child inherits from you under California’s intestacy laws the same way a biological child would. You can name them as a beneficiary on life insurance and retirement accounts without legal ambiguity, and the child gains eligibility for your employer-sponsored health insurance as a dependent.

A legally adopted child is treated as your dependent for Social Security as well. If you become disabled or die, the child can receive benefits based on your earnings record the same as a biological child would. A child adopted before you become entitled to retirement or disability benefits is automatically treated as dependent.⁹

No Federal Adoption Tax Credit

The federal adoption tax credit does not apply when you adopt your spouse’s child. The credit for 2026 is worth up to $17,670 per eligible child for other types of adoptions, but Congress specifically excluded stepparent adoptions.¹⁰ Don’t plan your budget around a tax break that won’t materialize.

If Your Stepchild Is Not a U.S. Citizen

Adoption by itself does not give a child any immigration status. If your stepchild is not a U.S. citizen or lawful permanent resident, completing the adoption is a first step, but additional immigration filings are required afterward. You would need to file Form I-130 as a family-based petition, and the child would need to file for adjustment of status or an immigrant visa depending on whether they’re in the United States.¹¹

If you’re a U.S. citizen and your adopted child is already a lawful permanent resident living with you, the child may qualify for automatic citizenship under INA Section 320, with Form N-600 used to obtain a Certificate of Citizenship. For children living abroad, Form N-600K applies under INA Section 322. The intersection of adoption and immigration law has pitfalls that aren’t obvious from the forms alone, and an immigration attorney is worth consulting.¹¹

1
Justia. California Code Family Code 9000-9007 – Stepparent Adoptions
2
California Legislative Information. California Code Family Code FAM 8601
3
Judicial Branch of California. Stepparent Adoption to Confirm Parentage
4
California Legislative Information. California Family Code 7822
5
Judicial Branch of California. Stepparent Adoption in California
6
California Courts. ICWA Information Sheet – ICWA Inquiry
7
Judicial Branch of California. File a Stepparent Adoption Request With the Court
8
California Department of Public Health. The Adoption Process Pamphlet
9
Code of Federal Regulations. 20 CFR 404.362 – When a Legally Adopted Child Is Dependent
10
Internal Revenue Service. Understanding the Adoption Tax Credit
11
U.S. Citizenship and Immigration Services. Immigration, Adoption, and Citizenship for Stepchildren of U.S. Citizens and LPRs