In California, stepparent adoption lets a married spouse or registered domestic partner become the full legal parent of their partner's child. It is used when the adopting partner is not already a legal parent. If the child has another legal parent, that parent must consent or have their rights ended. Many same-sex spouses are already legal parents and may not need it.
Most people facing this question are partway through building a family that already feels settled at home. One spouse or partner gave birth to or adopted the child, and the other has been raising that child just as fully. Then a school form, a medical decision, a trip out of state or a will raises the question of whether the law sees both of them as parents. The confusion is real, because California offers more than one route to legal parentage, and the right answer depends on the family's history: when the couple married or registered, how the child was conceived, and what papers were signed at the time.
This article explains what stepparent adoption is, who qualifies, how it differs from confirmatory adoption, what happens to another parent's rights, what the adoption changes, and when a non-biological spouse may already be a legal parent without adopting at all.
What Stepparent Adoption Means Under California Law
Family Code section 9000 and the sections after it govern stepparent adoption. That is an adoption of a child by the spouse or domestic partner of the child's existing legal parent. It sits inside the broader adoption framework that starts at Family Code section 8600, which covers adoption in California generally.
In plain terms, a stepparent adoption adds the adopting spouse as a full legal parent. When the child has a second legal parent outside the marriage, such as a former partner, that person's parental rights end through the adoption. The parent who is married to the adopting spouse keeps every right they had. The result is a family of two legal parents: the existing parent and the adopting spouse or partner.
Two other terms come up often, and they mean different things:
- Confirmatory adoption is used when the adopting spouse already has a legal relationship to the child, for example through written consent to assisted reproduction. The adoption confirms a relationship that exists rather than creating a new one.
- Second-parent adoption describes an adoption in which a partner adopts without ending the existing parent's rights. For married spouses and registered domestic partners, the stepparent route is available, so these couples generally use stepparent or confirmatory adoption rather than a separate second-parent process.
One point deserves care. For many same-sex couples, the non-biological spouse or partner may already be a legal parent, either through a parentage presumption (a rule that treats a person as a parent based on facts like marriage) or through a voluntary declaration of parentage. If that is true, a stepparent adoption may not be needed, and the question shifts to whether a confirmatory adoption or a parentage judgment adds protection. The site's guide to legal strategies for same-sex adoption covers related planning questions.
Who Qualifies as a Stepparent Under California Family Code Section 9000
The core requirement is a legal relationship with the child's parent. Under Family Code section 9000, the person adopting must be the spouse or registered domestic partner of the child's legal parent.
Both married same-sex spouses and registered domestic partners qualify. Family Code section 297.5 gives registered domestic partners the same rights and duties as spouses. That rule came from AB 205 (Stats. 2003, ch. 421). From January 1, 2005, registered domestic partners have the rights and duties of spouses, whenever they registered. A couple who registered years earlier and a couple who registered last month stand on the same footing today.
The relationship has to exist at the time of the adoption. A partner who is not married to, or registered with, the child's legal parent does not fit the stepparent definition. For couples who are both registered and married to each other, the law treats those as two separate relationships, and either one supports stepparent status.
The child's other legal parent, if there is one, matters next. That parent can give written consent, or their parental rights can be ended through a separate legal process. Both paths are explained below. If the child has no second legal parent at all, for example because the child was conceived with donor sperm and no one else holds parent status, the consent step may be simpler. Even then, the court still looks at whether the adoption is in the child's best interests before granting it.
How Stepparent Adoption Differs from Confirmatory Adoption for Same-Sex Couples
Family Code section 9000.5 sets out confirmatory adoption. It applies when the adopting spouse or partner already has a legal parent-child relationship with the child, and the adoption confirms and records that relationship in a court order.
Stepparent adoption under Family Code section 9000 covers the opposite situation: the adopting spouse or partner does not yet have any legal parent-child relationship with the child.
For same-sex couples who used assisted reproduction, this line is often the whole question. Under Family Code section 7613, a person who consents in writing to assisted reproduction with the intent to be a parent is treated as a legal parent of the resulting child. When both spouses signed that consent, both are already legal parents. In that case, a confirmatory adoption may be the fitting step, or no adoption may be needed at all.
Why the difference matters comes down to the other parent. A confirmatory adoption does not end anyone else's parental rights, because it only confirms a parent who already exists. A stepparent adoption, by contrast, requires that any second legal parent outside the marriage consent or have their rights ended, unless there is no second legal parent.
Both routes sit against the backdrop of the Uniform Parentage Act, Family Code section 7600 and following, which governs how California decides who a child's legal parents are. A parentage question usually comes first, and the adoption question follows from its answer. For couples who later separate, that same history shapes custody, which the site's article on parental rights in same-sex divorce explains further.
The Role of the Other Legal Parent: Consent and Termination of Parental Rights
A stepparent adoption under Family Code section 9000 needs one of two things from the child's other legal parent: that parent's consent, or an end to that parent's rights through a legal process.
Consent is the simpler path. A legal parent who agrees can give up their rights so the adoption can go forward. Relinquishment, a formal giving up of parental rights, is another route the Family Code recognizes.
When a legal parent does not consent, their rights may be ended through a court proceeding. Family Code section 7820 and the sections after it govern what the law calls "freedom from parental custody and control." The statute lists specific grounds, including abandonment and failure to support, along with others it sets out. These cases turn closely on their facts.
Some children have no second legal parent of record. That can happen when a child was conceived with donor sperm, no one signed a voluntary declaration of parentage, and no presumption applies to anyone outside the couple. In that situation, there may be no other parent whose consent is needed. The court still reviews the child's best interests.
This is where donor questions usually arise. A sperm donor who has not become a legal parent, whether under Family Code section 7613 or through a voluntary declaration, is not a parent whose rights must be ended. A couple who is unsure how a known donor's role was documented is often carrying real worry about this point, and the paperwork from the time of conception is usually where the answer starts.
What Stepparent Adoption Does — and Does Not — Change About a Child's Legal Status
Family Code section 8616 states the core effect of adoption: after an adoption, the adoptive parent and the child have the legal relationship of parent and child. The adopting spouse holds the same status as if the child had been born to them, with every right and duty that comes with it.
The adoption also ends the legal tie between the child and any parent whose rights were given up or ended. That person no longer has parental rights or duties toward the child, including inheritance rights between them when there is no will. The parent married to the adopting spouse is not affected and remains a full legal parent.
After the court issues the adoption order, a new birth certificate can be issued showing the adopting parent. California Health and Safety Code section 102635 governs that reissuance. The adoption proceeding can also address the child's name if the family wants a change.
An adoption order is generally final once the court enters it. That finality is part of why some couples value an adoption or confirmatory adoption even when a parentage presumption already applies: a presumption is a starting point that, in limited circumstances, another person can challenge, while an adoption order is a court judgment. For couples thinking ahead about money, property and children together, the site's guide to pre- and post-nuptial agreements covers a related kind of planning.
When Adoption May Not Be Necessary: Parentage Presumptions and Voluntary Declarations
Family Code section 7611 sets out one of the most important rules for married same-sex couples. A person is presumed to be a child's parent when they were married to, or in a registered domestic partnership with, the child's birth parent and the child was born during that marriage or partnership, or within 300 days after it ended.
A voluntary declaration of parentage is a second route. Under Family Code section 7571 and the sections after it, parents can sign a declaration that establishes parentage without going to court. It carries legal weight once properly signed and filed.
Assisted-reproduction consent is a third. As described above, Family Code section 7613 treats a spouse or partner who consented in writing to assisted reproduction as a legal parent of the resulting child.
Some families are more layered than two parents. SB 274 (Stats. 2013, ch. 564) allows a California court to find that a child has more than two legal parents when the circumstances support it. That law can matter for blended families, known-donor arrangements, and families where a former partner remains part of the child's life.
Put together, these routes mean that a same-sex spouse or partner may already be a legal parent before anyone files an adoption petition. When that is so, a stepparent adoption may not be needed, and a confirmatory adoption may be the more fitting step for a family that wants a court order to rely on. Which of these applies depends on the dates of the marriage or registration, how the child was conceived, and what was signed. Questions about non-biological parents' rights often turn on exactly these facts.
If You'd Like to Talk Through the Parentage Question
Whether a stepparent adoption is even needed usually depends on facts that are easy to overlook: the date of the marriage or registration, how the child was conceived, whether a consent form or voluntary declaration was signed, and whether anyone else holds parent status. Those same facts shape custody and support if a couple later separates, and they are what a consultation focuses on. The firm practises California family law only and does not take adoption matters, so a family ready to file an adoption petition will want an adoption attorney for that step; the related parentage, custody or same-sex divorce question is where the firm can help.
To talk through how California's parentage rules apply to your family, call LGBTDivorceLaw.com at (866) 343-4226 for a confidential consultation.