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Child Custody Disputes: How Courts Decide Parenting Arrangements

Hallack Law, PLLC Sept. 19, 2025

Upset child with parents arguing in the backgroundChild custody disputes are among the most emotionally charged and complicated issues addressed by family courts. In Washington State, the legal system prioritizes the best interests of the child when determining parenting arrangements, striving to create stable, nurturing environments while balancing parental rights and responsibilities. 

The section below explores the legal structure, processes, and factors that Washington courts consider when resolving child custody disputes, offering a comprehensive overview of how parenting plans are crafted and enforced. 

Hallack Law, PLLC, in Seattle, Washington, can help you understand the statutory guidelines, judicial considerations, types of custody, and dispute resolution methods for parents managing these proceedings. Contact me, attorney Jen Hallack, for assistance today. 

Child Custody Laws in Washington

Washington State’s approach to child custody is governed by the Revised Code of Washington (RCW), specifically Title 26, which addresses domestic relations. The term “custody” has largely been replaced with “parenting arrangements” to reflect a focus on cooperative parenting rather than adversarial possession of a child. 

The cornerstone of these laws is RCW 26.09, the Parenting Act, which emphasizes creating a parenting plan that serves the child’s best interests.

A parenting plan is a court-approved document outlining each parent’s responsibilities, including residential schedules, decision-making authority, and dispute resolution mechanisms.

Washington courts aim to promote shared parenting when feasible, encouraging both parents to maintain meaningful relationships with their child unless specific circumstances, such as abuse or neglect, justify restrictions.

Types of Custody Arrangements

Washington doesn't use the terms “legal custody” or “physical custody” explicitly but instead focuses on residential schedules and decision-making authority. Parenting arrangements can be categorized as follows:

  • Joint parenting arrangements: Both parents share significant residential time and decision-making responsibilities. This arrangement is favored when parents can cooperate effectively and live in proximity, allowing the child to maintain strong relationships with both.

  • Primary residential parent: One parent is designated as the primary caregiver, with the child residing with them most of the time. The other parent typically has visitation rights or a limited residential schedule.

  • Sole decision-making authority: In cases where cooperation is unfeasible—due to conflict, distance, or other factors—one parent may be granted sole authority over major decisions, such as education, healthcare, or religious upbringing.

  • Restricted contact: If a parent poses a risk to the child’s well-being (e.g., due to substance abuse, domestic violence, or criminal behavior), the court may limit or supervise their contact.

The court’s goal is to tailor the parenting plan to the family’s unique circumstances, prioritizing the child’s physical, emotional, and developmental needs.

The Best Interests of the Child Standard

At the heart of every custody decision in Washington is the “best interests of the child” standard, codified in RCW 26.09.187. This principle guides judges in evaluating factors to determine the most suitable parenting arrangement. The statute lists seven specific factors, which are considered in the following order of priority:

  1. The strength of each parent’s relationship with the child: Courts assess which parent has historically been the primary caregiver and the nature of each parent’s bond with the child. For example, a parent who has consistently attended school events, medical appointments, or extracurricular activities may be viewed as having a stronger relationship.

  2. Each parent’s ability to perform parenting functions: This includes providing for the child’s basic needs, such as food, shelter, and emotional support, as well as fostering the child’s development.

  3. The child’s relationships with siblings and other significant adults: Courts consider the importance of maintaining continuity in the child’s relationships with siblings, grandparents, or other influential figures.

  4. The child’s involvement in community and school: Stability in the child’s school, extracurricular activities, and community ties is prioritized to minimize disruption.

  5. Each parent’s employment schedule: The court evaluates how each parent’s work commitments affect their availability to care for the child.

  6. The child’s wishes, if mature enough: Courts may consider the preferences of older children, typically over 12, if they demonstrate sufficient maturity and reasoning.

  7. Any history of domestic violence or abuse: A parent’s history of domestic violence, substance abuse, or neglect can significantly limit their residential time or decision-making authority.

These factors aren't exhaustive, and courts have discretion to consider additional circumstances, such as mental health, financial stability, or cultural considerations, to assure the child’s well-being.

Parenting Plans

A parenting plan is the blueprint for post-separation parenting in Washington. It must address three key components:

  • Residential schedule: This outlines where the child will live on specific days, including weekdays, weekends, holidays, and vacations. Schedules can range from equal time (e.g., a 50/50 split) to one parent having primary residential time with designated visitation periods for the other.

  • Decision-making authority: The plan specifies which parent makes decisions about major issues, such as education, healthcare, and religion. Joint decision-making is preferred unless impractical due to conflict or other barriers.

  • Dispute resolution process: The plan includes a mechanism for resolving future disagreements, such as mediation or arbitration, to avoid returning to court.

Parenting plans must be proposed by both parents, either jointly or individually, during divorce or separation proceedings. If parents can’t agree, the court will impose a plan based on evidence presented during hearings or trials.

The Court Process in Custody Disputes

When parents can’t reach a mutual agreement on a parenting plan, the court intervenes to resolve the dispute. Contact attorney Jen Hallack at Hallack Law, PLLC, for assistance through this process today. 

The process typically involves the following steps:

1. Filing a Petition

Custody disputes arise in the context of divorce, legal separation, or parentage actions (for unmarried parents). One parent files a petition with the superior court in the county where the child resides, requesting the establishment or modification of a parenting plan.

2. Temporary Orders

To address immediate needs, courts may issue temporary parenting orders while the case is pending. These orders establish a temporary residential schedule and decision-making structure until a final plan is determined.

3. Mediation and Alternative Dispute Resolution

Washington courts encourage parents to resolve disputes through mediation, a process where a neutral third party helps parents negotiate a mutually acceptable parenting plan. Mediation is mandatory in many counties unless domestic violence or other exemptions apply. Other methods, such as collaborative law or arbitration, may also be used.

4. Appointment of a Guardian ad Litem (GAL)

In contentious cases, the court may appoint a Guardian ad Litem or a Court Appointed Special Advocate (CASA) to represent the child’s interests. The GAL investigates the family’s circumstances, interviews parents and the child, and submits a report with recommendations to the court.

5. Hearings or Trial

If mediation fails, the case proceeds to a hearing or trial. Both parents present evidence, including testimony, documents, and authority opinions (e.g., from psychologists or social workers). The judge evaluates the evidence in light of the best interests standard and issues a final parenting plan.

6. Post-Judgment Modifications

Parenting plans aren't set in stone. Either parent can request a modification if there's a substantial change in circumstances, such as relocation, remarriage, or a change in the child’s needs. Minor adjustments may be made through agreement or mediation, while major changes require court approval.

Factors Influencing Court Decisions

Beyond the statutory factors, Washington courts consider practical and case-specific elements when crafting parenting plans for child custody. These include:

Parental Cooperation

Courts favor arrangements that promote cooperative parenting. Parents who demonstrate willingness to communicate and prioritize the child’s needs are more likely to receive favorable consideration. Conversely, a parent who engages in alienating behaviors—such as disparaging the other parent or interfering with their time—may face restrictions.

Domestic Violence and Safety Concerns

A history of domestic violence is a critical factor. RCW 26.09.191 allows courts to impose restrictions, such as supervised visitation or no contact, if a parent has committed domestic violence, child abuse, or neglect. The court may require the parent to complete treatment or counseling before restoring full access.

Parental Relocation

If a parent wishes to move with the child, they must comply with Washington’s relocation statute (RCW 26.09.430–560). The relocating parent must provide notice, and the court evaluates whether the move serves the child’s best interests, considering factors like the reasons for relocation and its impact on the child’s relationships.

Special Needs of the Child

Children with physical, emotional, or developmental needs may require tailored arrangements. For example, a child with autism may benefit from a consistent routine, influencing the residential schedule.

Cultural and Religious Considerations

Courts may account for cultural or religious practices that shape the child’s upbringing, such as dietary restrictions or participation in religious ceremonies, provided they align with the child’s best interests.

Contact a Family Law Attorney Today

Child custody disputes in Washington are resolved through a structured yet flexible process centered on the best interests of the child. By emphasizing cooperative parenting, prioritizing safety, and tailoring arrangements to the child’s needs, courts aim to create stable and supportive environments. 

While the process can be emotionally and financially taxing, parents who approach disputes with preparation, cooperation, and a child-focused mindset are better positioned to achieve favorable outcomes. Understanding the legal structure, engaging in mediation, and seeking professional guidance are critical steps in managing this complicated terrain. 

Contact me for legal assistance today. I serve residents throughout King County, Washington, including Bellevue, Renton, Kent, Auburn, Enumclaw, Issaquah, Snoqualmie, North Bend, Kirkland, Redmond, Woodinville, and Skykomish.