Can Same-Sex Couples Adopt in Washington?

Yes. Same-sex couples can adopt in Washington, whether they are married or unmarried, and Washington law is written in a way that treats them the same as any other prospective parents.

For related help, see family-law help, Washington parenting-plan guide, and child-support guide.

What the Law Says About Who May Adopt

Washington's adoption statute does not sort applicants by sexual orientation or by the makeup of a couple. It focuses on individual eligibility. Under RCW 26.33.140, any person who is legally competent and at least eighteen years of age may be an adoptive parent, and any person may be adopted regardless of age or residence. Because the statute speaks in terms of a legally competent adult, each partner in a same-sex couple meets the same eligibility standard that anyone else meets.

Washington has also been a marriage-equality state for years, and its parentage and family laws are written in gender-neutral terms. Nothing in the adoption chapter carves out an exception based on the gender of the adopting parents. The result is a legal framework that is inclusive by design.

Married Same-Sex Couples

A married same-sex couple can adopt jointly in Washington just as any married couple can. Both spouses can be recognized as the legal parents of the child through the adoption, which gives the child two legal parents and the full range of rights and protections that come with those relationships, including inheritance, decision-making authority, and access to benefits.

For married couples, the process generally mirrors what any married couple experiences: a petition, a home study, court oversight, and a final hearing. The court's focus stays on the best interests of the child and the fitness of the prospective parents, applying the eligibility standard in RCW 26.33.140 to each spouse.

Unmarried Same-Sex Couples

Marriage is not a requirement to adopt in Washington. Because RCW 26.33.140 measures eligibility by whether a person is a legally competent adult, an unmarried partner in a same-sex relationship can pursue adoption. Depending on the circumstances, partners may adopt together or one partner may adopt with the intention that the family later formalizes the second parent's relationship as well. The absence of a marriage certificate does not, by itself, close the door.

That said, unmarried couples should think carefully about how each partner's legal relationship to the child will be established, because legal parentage is what protects the family if circumstances change. This is an area where careful planning matters, and where guidance from a family law attorney can prevent gaps.

Second-Parent and Stepparent Adoption

One of the most common paths for same-sex couples is a second-parent or stepparent adoption. This arises when one partner is already a legal parent of the child, often through birth, a prior adoption, or assisted reproduction, and the other partner adopts the child to become a second legal parent. The outcome is that the child has two legally recognized parents, and the second parent gains all the rights and responsibilities of parenthood.

Second-parent and stepparent adoptions are especially valuable for families who built their families through assisted reproduction. Even when Washington's parentage laws already recognize both partners, an adoption creates a court judgment that is entitled to recognition across state lines, which adds a durable layer of security if the family travels or moves. The eligibility standard for the adopting partner remains the one set out in RCW 26.33.140.

What the Court Reviews

As with any adoption, the court's role is to make sure the placement serves the child. A key piece of that review is the preplacement report. Under RCW 26.33.190, someone seeking to adopt has a written report prepared that sets out relevant information about their fitness as an adoptive parent, based on a study of the home environment, family life, health, and resources, and including a recommendation on fitness. The statute also requires a background check that reviews conviction records, pending charges, and child abuse and neglect history for adults in the home.

These requirements apply evenhandedly. A same-sex couple goes through the same home study and background review as anyone else, and the report focuses on the stability and safety of the home rather than on the identity of the parents.

Why Legal Parentage Matters So Much

For same-sex couples, securing clear legal parentage for both partners is not a formality. It determines who can make medical decisions for the child, who has custody rights if the relationship ends, who the child inherits from, and whether the family's parental relationships are respected if they cross state lines. Because laws vary from state to state, a Washington adoption judgment is one of the strongest tools available for protecting both parents' relationships with the child everywhere they go.

This is why many same-sex couples pursue an adoption even when they believe they are already legally protected. The court judgment is portable and hard to challenge, and it removes uncertainty.

Building Your Family in Snohomish County

Same-sex couples in Snohomish County pursue adoption through the same courts and under the same statutes as everyone else in Washington. The Snohomish County Superior Court handles these matters, and local families benefit from working with counsel who understands both the adoption process and the parentage questions that often accompany it. Adoption and family law overlap constantly here, from establishing parentage to formalizing a second parent's rights.

The Law Office of Chad Foster helps same-sex couples across Snohomish County understand their options and secure the legal protections that come with adoption. If you and your partner are thinking about adoption or a second-parent adoption, reach out to talk through the path that fits your family.