How do I adopt my stepchild if the biological mother won't sign in Washington?

Short answer: In Washington, a biological mother's refusal to sign does not automatically end a stepparent adoption. You can ask the Superior Court in your county to move forward without her consent, most often on the ground of abandonment under RCW § 26.33.120. Whether the court agrees depends on the facts of your family.

How abandonment works here: Washington sets no fixed number of months for abandonment. The court looks at the parent's overall conduct. Years of non-involvement typically support an abandonment finding. Her payment of child support, even sporadic payments, does not by itself prevent that finding if she hasn't maintained meaningful contact with the child. Courts look at the whole relationship, not only money.

If she is involved but simply refuses: This is a different situation. If she has stayed meaningfully connected to your stepchild, abandonment is harder to show, and the case may become contested. How a court would treat your facts is a question for an attorney or the Superior Court clerk in your county.

What the process looks like:

• Where you file: the Superior Court in your county. Washington has 39 counties, and the clerk can tell you about local procedures.
• Residency: Washington has no minimum residency period. Venue is covered by RCW 26.33.030.
• Termination: Washington does not treat termination as a separate case, so the question of her rights is handled within the adoption.
• Notice to the mother: She must be notified of the case. The clerk or an attorney can confirm how notice and response deadlines work for your situation.
• Your stepchild's consent: A child who is 14 or older must consent under RCW § 26.33.160.
• Home study: Home study requirements fall under RCW 26.33.220. Ask the clerk what applies to your case.

Timeline and cost: A stepparent adoption in Washington typically takes 3-6 months. Court filing fees generally run $200-$500, and the total cost is typically under $1,000. Attorney representation commonly costs $3,000-$5,000 or more.

When to talk to an attorney: If the mother has said she will fight the adoption, if she has recently been in regular contact, or if you're unsure whether her history amounts to abandonment, get advice on your specific facts. The same applies if you can't locate her. The clerk can explain filing steps but cannot give legal advice.

Washington courts and stepparent adoption: Courts here are very supportive of stepparent adoptions because they give children stability and legal protection. Judges routinely approve adoptions that are in the child's best interest.

How we help: StepParent Adoption 360 is a document preparation service, not a law firm. You answer questions online, and we prepare the complete court document package for your county. You then file it yourself without an attorney. The price is $349 for the first child and $99 for each additional child. Court-ready documents are delivered within 24-48 hours after you finish the questions, and our 100% court acceptance guarantee applies. We have helped 1104 Washington families, and more than 34,000 families nationally since 2001.