Grandparent Custody Rights in Washington: Third-Party Custody and Visitation

Grandparents who have been raising a grandchild, or who are watching a grandchild's welfare deteriorate in their parent's care, often assume they can go to court and ask for custody. In Washington, they can — but the legal threshold is deliberately high, and the path differs significantly from a standard custody case between two parents.

Washington law protects parents' constitutional right to make decisions about their children's care and upbringing. The U.S. Supreme Court reinforced this principle in Troxel v. Granville (2000), a case that originated in Washington. To override a fit parent's decisions, a non-parent must clear a substantial legal hurdle that goes beyond showing the child would be "better off" with the grandparent.

Third-Party Custody Under RCW 11.130 (Minor Guardianship)

Washington repealed its old nonparental custody chapter (former RCW 26.10) effective January 1, 2021. Grandparents and other non-parents now petition for a minor guardianship under RCW 11.130. A person interested in the child's welfare may file. The court may appoint a guardian only if the appointment is in the child's best interest and: (a) each parent consents after being fully informed of the nature and consequences of guardianship; (b) all parental rights have been terminated; or (c) there is clear and convincing evidence that no parent is willing or able to exercise parenting functions as defined in RCW 26.09.004.

The petition is filed in Superior Court, typically in the county where the child lives. The filing fee is $364 (waivable under GR 34 for low-income petitioners). The court schedules a hearing, and the petitioner must serve the parents and other required persons under RCW 11.130.195. A fit parent's constitutional right to raise their child still frames the case. Showing that the child would be "better off" with the grandparent is not enough.

The Practical Reality for Grandparents

The legal standard creates a gap between what grandparents feel is right and what the court can do. A grandparent who has been providing daily care while the parent works long hours may feel — reasonably — that they are the child's primary attachment figure. But if the parent is fit, employed, and providing a safe home, the court will not transfer custody simply because the grandparent has more time or a stronger bond.

The circumstances where grandparent custody petitions succeed typically involve:

• Parental absence — both parents are incarcerated, have abandoned the child, or are otherwise physically unable to provide care
• Substance abuse — active, documented drug or alcohol addiction that prevents safe parenting
• Abuse or neglect — substantiated CPS findings or documented patterns of harm
• Parental consent — the parent voluntarily agrees to the custody arrangement (this simplifies the legal process considerably)
• The child has been living with the grandparent for an extended period and returning to the parent would cause significant disruption

Grandparent Visitation vs. Grandparent Custody

These are different legal mechanisms. Visitation allows a grandparent to have scheduled time with the child while the parent retains full custody. Custody transfers the child's primary residence to the grandparent.

Washington's current nonparent visitation statute is chapter 26.11 RCW (it replaced former RCW 26.09.240, which was repealed in 2018). A relative who is not a parent may petition for visitation only if:

• The petitioner has an ongoing and substantial relationship with the child — generally at least two years of substantial continuity, or half the child's life if the child is under two
• The petitioner is a relative of the child
• The child is likely to suffer harm or a substantial risk of harm if visitation is denied

A petitioner may file only once. The court cannot enter temporary visitation orders. After Troxel, a fit parent's decision to deny visitation is presumed to be in the child's best interests and not to create a likelihood of harm. The petitioner must rebut that presumption by clear and convincing evidence that the child would likely suffer harm or a substantial risk of harm without visitation, and then prove by clear and convincing evidence that visitation is in the child's best interest.

Kinship Care and De Facto Parentage

Two additional legal frameworks may apply depending on the grandparent's situation:

Kinship care occurs when DCYF (the Department of Children, Youth, and Families) places a child with a relative — including a grandparent — as an alternative to foster care. Kinship caregivers may receive financial assistance and support services through the state. This is an administrative placement, not a court-ordered custody arrangement, and the parent may still be working toward reunification.

De facto parentage under RCW 26.26A.440 allows a person who has functioned as a child's parent — with the parent's knowledge and consent — to petition for legal recognition as a parent. If a grandparent has been the child's primary caregiver for a substantial period, living in the same home, providing daily care, and holding themselves out as a parent figure, they may qualify for de facto parent status. This is a higher legal status than third-party custody and carries the full rights and obligations of parenthood.

The de facto parentage standard is demanding. The petitioner must show that they resided with the child, that the parent encouraged and accepted the parenting role, and that the petitioner bonded with the child in a parental capacity. Occasional caregiving or weekend visits do not qualify.

What Grandparents Should Document

If you are considering a custody petition, start building a record now:

• Daily caregiving logs — when you provide meals, transportation to school, help with homework, attend medical appointments, or handle bedtime routines
• Financial contributions — receipts for clothing, school supplies, medical expenses, and other child-related costs you have paid
• Communication records — text messages, emails, or co-parenting app logs showing the parent's awareness and acceptance of your caregiving role
• Third-party observations — teachers, pediatricians, and counselors who can confirm your regular involvement in the child's life
• CPS records — if applicable, any documentation of investigations or substantiated findings against the parent

How the Guide Helps

The Washington Child Custody & Parenting Plan Guide covers the parenting plan framework that applies to all custody arrangements in Washington — including third-party custody. It includes caregiving documentation worksheets, a hearing preparation checklist, and a walkthrough of the best-interests factors under RCW 26.09.187 that courts apply when evaluating custody petitions from non-parents.

See more Washington guides →