Child Custody in Washington

Overview of Washington Custody Law

Washington state does not use the term “custody” in its family law statutes. Instead, Washington uses the concept of a parenting plan, which replaces the traditional custody order. The parenting plan governs decision-making authority, the residential schedule, and dispute resolution procedures for parents after separation or divorce. This approach is codified in RCW 26.09.187 and related sections of the Revised Code of Washington.

Every custody case in Washington must result in a parenting plan, whether agreed upon by the parents or imposed by the court. The parenting plan framework is designed to encourage parents to focus on specific arrangements for their children rather than framing the process as a win-or-lose custody battle.

The Parenting Plan

A Washington parenting plan is a comprehensive document that addresses three key areas:

• Decision-Making Authority — The plan designates which parent has the authority to make major decisions regarding the child’s education, health care, and religious upbringing. Decision-making may be shared between parents or allocated to one parent.
• Residential Schedule — The plan establishes where the child will reside on a day-to-day basis, including weekdays, weekends, holidays, school breaks, and summer. The schedule specifies the child’s “primary residence” and outlines the other parent’s residential time.
• Dispute Resolution — The plan must include a method for resolving future disagreements, such as mediation or arbitration, before either parent may return to court.

For a broader explanation of custody frameworks, see our guide on child custody laws explained.

Best Interests Factors

Under RCW 26.09.187, Washington courts consider the following factors when establishing a parenting plan:

• The relative strength, nature, and stability of the child’s relationship with each parent
• The agreements of the parties, if they were entered into knowingly and voluntarily
• Each parent’s past and potential for future performance of parenting functions
• The child’s emotional needs and developmental level
• The child’s relationship with siblings and any other significant adults
• The wishes of the parents and the wishes of a child who is sufficiently mature to express reasoned and independent preferences
• Each parent’s employment schedule
• The nature and quality of each parent’s home environment

The court is also required to consider factors that may limit a parent’s residential time, including a history of domestic violence, neglect, sexual or physical abuse, or substance abuse.

Custody Presumptions

Washington does not use a presumption in favor of joint custody or sole custody. Because the state uses the parenting plan model, the court crafts each plan based on the specific circumstances of the family. However, Washington law does include mandatory limitations on a parent’s decision-making and residential time when there is a finding of domestic violence, sexual abuse, neglect, or a history of substance abuse that interferes with parenting. These limitations are set out in RCW 26.09.191.

Child’s Preference

Washington does not set a specific age at which a child may express a preference about their residential schedule. The statute allows courts to consider “the wishes of a child who is sufficiently mature to express reasoned and independent preferences.” In practice, courts give increasing weight to a child’s stated wishes as the child matures, but the child’s preference is never the sole determining factor. The court assesses whether the child’s opinion reflects genuine reasoning or parental influence. For more on how courts weigh these considerations, see our guide on how child custody is determined.

Mandatory Mediation

Mediation is mandatory in most Washington counties before a contested parenting plan case can proceed to trial. Many counties require parents to attend at least one mediation session. The goal is to help parents reach an agreement on the parenting plan without the need for judicial intervention. Mediation is typically waived in cases involving domestic violence or when there is a significant power imbalance between the parties. If mediation does not result in an agreement, the case proceeds to trial, where the court will impose a parenting plan.

Relocation Rules

Washington has a detailed relocation statute under RCW 26.09.405 through 26.09.560. A parent who intends to relocate with the child must provide written notice to the other parent at least 60 days before the intended move (or within 5 days of learning of the need to relocate, if the situation arises suddenly). The notice must include the intended new address, the reason for the move, and a proposed revised residential schedule.

The non-relocating parent may object by filing a motion within 30 days of receiving notice. The court then evaluates the request under 11 statutory factors, including the quality of life in the new location, the child’s relationship with each parent, the reason for the move, and the feasibility of preserving the relationship with the non-relocating parent. There is a rebuttable presumption that relocation will be permitted if the relocating parent is acting in good faith and the relocation is for a legitimate purpose.

Modification of Parenting Plans

To modify an existing parenting plan in Washington, the parent seeking the change must demonstrate a substantial change in circumstances under RCW 26.09.260. The court then evaluates whether the proposed modification serves the child’s best interests. Within the first two years after the parenting plan is established, modification is more difficult — the requesting parent must show that the child’s present environment is detrimental to the child’s physical, mental, or emotional health.

After the two-year period, the standard relaxes to the general substantial change in circumstances test.

When to Seek Legal Help

Washington’s parenting plan framework is more detailed and structured than custody systems in many other states. The mandatory plan requirements, mediation expectations, and specific relocation procedures mean that understanding the process early can help you prepare effectively. If you are navigating a parenting plan dispute, a relocation situation, or a modification request, consider scheduling a free consultation to discuss your options with a qualified professional.