The Washington Court of Appeals has upheld a trial court's decision regarding a parenting plan in the case of Karena L. McKenzie v. Scott McKenzie, docket number 61890-7. The ruling affects the couple's child, ZM, and clarifies the standards for modifying parenting plans in Washington state.

In this case, the parents, Karena and Scott McKenzie, dissolved their marriage in 2021 and agreed to a parenting plan that allowed for equal time with their child, ZM, who was five years old at the time. The plan included provisions for joint decision-making regarding ZM's education and healthcare, along with mediation for resolving disputes. However, in 2025, Karena's work schedule changed, leading to increased time for ZM in before- and after-school care. Concerned about the impact of this change, Scott petitioned the court to modify the parenting plan to make him the primary residential parent.

Scott's petition aimed to reduce Karena's residential time with ZM to every other weekend, arguing that the increased time in care was detrimental to ZM's well-being. However, the trial court found no adequate cause to warrant a full hearing on Scott's petition and dismissed it. The court emphasized that changing a parenting plan requires a high threshold of proof, and disputes over childcare arrangements do not automatically indicate that a child's living situation is harmful.

The court highlighted that the trial court had previously approved a parenting plan in May 2021, which provided for an equal split of residential time. Under this plan, ZM would spend one week with each parent, with additional visits on Tuesdays during the off week. The trial court noted that while ZM was experiencing stress, it was unclear whether this was due to her time in childcare or other factors, such as a lingering sports injury.

In his petition, Scott argued that ZM's emotional distress was linked to her increased time in before- and after-school care. However, the trial court found that Scott did not provide sufficient evidence to support his claims. The court pointed out that Scott's assertions were largely based on his observations and opinions rather than concrete evidence showing that ZM's environment with Karena was detrimental to her health.

The court ruled, "The circumstances for changing a parenting plan are very limited" and that the petitioner must demonstrate that the current living situation is harmful to the child’s physical, mental, or emotional health. The trial court concluded that Scott's claims did not meet the necessary burden of proof to advance to a full hearing.

Moving forward, this ruling reinforces the principle that modifying a parenting plan is a significant legal step that requires strong evidence of a substantial change in circumstances. The court's decision indicates that mere disagreements over childcare arrangements do not suffice to justify a change in custody or residential time.

This ruling could impact future custody disputes in Washington state, as it sets a precedent for the level of evidence required to modify existing parenting plans. Parents seeking to change custody arrangements must be prepared to provide compelling evidence that demonstrates a significant change in circumstances affecting the child's well-being.

As for the next steps, Scott McKenzie has the option to appeal the decision, although the court's ruling emphasizes the high bar for modification of parenting plans. There are no related cases pending that could influence this decision.