Mediation for Custody Modification in California: How the Process Works

If you and the other parent want to change an existing custody order in California, mediation can help you work out a new parenting plan together. When a change is contested in court, the court must send the disputed issues to its own custody mediation. Either way, a new agreement changes nothing legally until a judge approves it as a court order.

Most people facing this question already have a custody order or parenting plan that once fit their family and no longer does. A child has grown older, a parent's work schedule has shifted, a move is on the table, or the weekly handoffs simply stopped working. You may be hoping to sort it out with the other parent without a hearing, or the court may already have told you that mediation comes first. Either way, the open questions tend to be the same: what the law requires to change the order, which kind of mediation applies, and what happens to an agreement once you reach one.

This article walks through those questions for parents in San Diego County and, through online mediation, parents anywhere in California. In plain terms, a custody modification is a new court order that replaces some or all of the custody and visitation terms in the old one.

What a Custody Modification Requires Under California Law

Family Code section 3022 gives the court ongoing authority over custody. The court may, "during the pendency of a proceeding or at any time thereafter, make an order for the custody of a child during minority that seems necessary or proper." That is why a custody order is never truly final while a child is a minor. It can be revisited.

To change an existing order, a parent generally has to show two things. The first is a significant change of circumstances since the last order. The second is that the change would serve the child's best interest. When both parents agree on the change, the court still looks at the child's best interest before signing a new order.

For joint custody orders, Family Code section 3087 says the order "may be modified or terminated upon the petition of one or both parents or on the court's own motion if it is shown that the best interest of the child requires modification or termination of the order." If either parent opposes the modification or termination order, the court must state in its decision the reasons for modifying or terminating the joint custody order. Family Code section 3088 separately allows an existing custody order to be changed to joint custody, subject to jurisdictional rules.

The "best interest of the child" is the legal standard behind every custody decision. Family Code section 3011 lists factors the court must consider, alongside any others it finds relevant, including:

• the health, safety and welfare of the child;
• any history of abuse by a parent or other person seeking custody;
• the nature and amount of contact with both parents; and
• habitual or continual illegal use of controlled substances, or habitual or continual abuse of alcohol or prescribed controlled substances, by either parent.

That list is partial; the section goes on to address other matters. Family Code section 3040 then sets an order of preference for custody, starting with both parents jointly or either parent, according to the child's best interest, though it creates no preference or presumption for joint or sole custody.

A parenting plan is the written set of custody and visitation terms, whether the parents drafted it together or the court ordered it. The step that trips up many parents is this: once a parenting plan is a court order, a new handshake agreement, text exchange or signed note does not change it. Only a new court order does. Both parents take part in that process, and neither one can rewrite the order alone.

When California Courts Require Mediation Before a Custody Hearing

Family Code section 3170(a) is direct: when it appears on the face of a petition, application or other pleading to obtain or modify a custody or visitation order that custody, visitation or both are contested, "the court shall set the contested issues for mediation." In that setting, mediation is not optional. Family Code section 3160 requires each superior court to make a mediator available, so the service is part of the court itself.

In San Diego County, family law cases are heard by the Superior Court of California, County of San Diego, and this court process is child custody recommending counseling through the court's Family Court Services. Under Family Code section 3183(a), except as provided in section 3188, the mediator may, consistent with local court rules, submit a recommendation to the court about custody or visitation. That is allowed only if the mediator has first given the recommendation in writing to the parties and their attorneys, including counsel for any minor children, before the hearing. A mediator with that authority is called a child custody recommending counselor; Family Court Services calls this person the Family Court Counselor.

According to the San Diego Superior Court, if the parents do not reach agreement, the counselor makes a recommendation and the court hearing goes forward. Section 3183 also lets the mediator recommend an investigation or other services when there is no agreement, and in appropriate cases recommend restraining orders to protect the child's well-being. The counselor's recommendation can carry real weight, but the judge makes the decision.

Domestic violence cases follow a different path. Under Family Code section 3170(b), they "shall be handled by Family Court Services in accordance with a separate written protocol approved by the Judicial Council."

Confidentiality works differently here, too. Evidence Code section 1117(b) says the Evidence Code's mediation confidentiality chapter does not apply to the court's custody mediation. Instead, Family Code section 3177 provides that these proceedings "shall be held in private and shall be confidential." More on how this court process compares is in our guide to child custody mediation.

This court process is separate from private mediation. Simple Divorce Mediation is a private practice and is not connected to the court, Family Court Services or any government program.

How Private Mediation Works in a Custody Modification

Evidence Code section 1115(a) defines mediation as "a process in which a neutral person or persons facilitate communication between the disputants to assist them in reaching a mutually acceptable agreement." A mediator, under section 1115(b), is "a neutral person who conducts a mediation." For two parents, that means someone who helps you talk through the parenting plan so you can reach terms you both accept.

The mediator does not represent either parent, advocate for either parent or act as either parent's lawyer. The mediator does not decide anything. Any agreement is one the two of you choose. Either parent may have an attorney of their own, and some parents do.

Private mediation is confidential under Evidence Code section 1119, except as the Evidence Code's mediation chapter otherwise provides. Generally, anything said and any writing prepared for or during a mediation or mediation consultation is not admissible or subject to discovery in a civil action or similar proceeding, and communications between participants "shall remain confidential."

That protection is not absolute. Under Evidence Code section 1123, a written settlement agreement prepared in mediation and signed by the settling parties can be admitted or disclosed if any of these apply: it says it is admissible or subject to disclosure; it says it is enforceable or binding; all parties expressly agree to its disclosure, in writing or orally as section 1118 allows; or it is used to show fraud, duress or illegality relevant to an issue in dispute. A parenting agreement meant to become a court order is usually written to be enforceable.

Remember the carve-out from the previous section: these Evidence Code rules do not reach the court's custody mediation, which has its own confidentiality rule. Our comparison of private and court mediation walks through the differences side by side.

Under Evidence Code section 1129, except in a class or representative action, an attorney representing a parent in mediation must, as soon as reasonably possible before the client agrees to participate, give that client a printed disclosure of the confidentiality restrictions and obtain a signed acknowledgment. If the attorney is retained later, the disclosure is due as soon as reasonably possible after the attorney is retained.

Finally, Evidence Code section 1115(c) defines a mediation consultation as a communication between a person and a mediator "for the purpose of initiating, considering, or reconvening a mediation or retaining the mediator."

What Parents Can and Cannot Resolve Through Mediation

If you are in immediate danger, call 911. Where there has been domestic violence, coercion or a protective order, safety comes first, and no one is encouraged to mediate with the other parent. As noted above, the court handles domestic violence cases under its own separate protocol.

For parents for whom it is safe, mediation can cover the core of a parenting plan. That includes legal custody, which is the authority to make decisions about a child's health, education and welfare, and physical custody, which is where the child lives. It also includes the visitation schedule: weekdays, weekends, holidays, school breaks and how exchanges happen. Our page on parenting plan mediation covers these terms in more detail.

A mediated agreement on custody and visitation becomes enforceable only when it is submitted to the court and entered as an order. Until then, the existing order still governs.

Child support often shifts when the parenting schedule changes. Parents may agree on an amount, but under Family Code section 4065(a) any stipulated amount is subject to the court's approval. The court will not approve an amount below the guideline formula unless the parents declare all of the following: they are fully informed of their rights concerning child support; the order is agreed to without coercion or duress; the agreement is in the best interests of the children; the children's needs will be adequately met by the agreed amount; and the right to support has not been assigned to the county and no public assistance application is pending. Parents cannot simply agree to any number. Our page on child support mediation explains this further.

Mediation also does not remove any financial disclosure that the law or the court requires. Whatever information the court needs to review support still has to be provided.

Mediation may not be right for every family. Where it is safe and both parents can take part freely, it may make a modification less adversarial, depending on the parents and the issues.

The Role of the Child's Best Interest in a Modification Agreement

Agreement between parents is the starting point, not the finish line. Any proposed modification, whether it comes out of private mediation, court mediation or a hearing, has to serve the child's best interest under Family Code section 3011, including the factors listed earlier. The court reviews a proposed agreement; it is not approved automatically.

Family Code section 3020 sets the policy context. The Legislature has declared that the health, safety and welfare of children is the court's primary concern in custody and visitation orders. It has also declared a public policy "to ensure that children have frequent and continuing contact with both parents" after separation, and to encourage parents to share the rights and responsibilities of raising children, except when that contact would not be in the child's best interest. When those two policies conflict, section 3020(c) says the order must protect the child's health, safety and welfare and the safety of all family members. Section 3020(d) adds that a parent's sex, gender identity, gender expression or sexual orientation is not considered.

In mediation, this tends to shape the conversation in a useful way. If you and the other parent are working through a new schedule, you are not only trading days on a calendar. You are building something a judge can look at and see a plan that works for your child. Agreements that explain how the child's school, health and relationships with both parents are accounted for are easier for a court to understand.

What to Expect When You Begin the Modification Process

A modification usually starts when one or both parents decide the current order no longer fits. From there, a parent may file a request with the court, or both parents may first try to reach an agreement through private mediation before anything is filed. Where a case is filed and which rules apply depend on the family's circumstances, such as where the parents and child live.

If a request is filed and custody or visitation is contested, Family Code section 3170 requires the court to set those issues for mediation. In San Diego County, that is child custody recommending counseling with Family Court Services; where domestic violence is a factor, Family Court Services follows its separate protocol under section 3170(b). The California Courts Self-Help Guide explains the court side of custody and visitation in general terms.

When parents reach agreement, whether before filing or during the case, the terms are typically put in writing and submitted to the court so a judge can enter a new order. Our overview of the San Diego divorce mediation process describes how private mediation fits alongside the court case more broadly.

For parents outside San Diego County, online mediation makes private mediation available anywhere in California, while any court steps happen in the superior court where the case is filed.

If You'd Like to Talk Through a Change to Your Parenting Plan

Changing a custody order sits at the meeting point of two processes: the agreement you and the other parent might reach, and the court order that has to follow it. Useful questions to talk through include what has changed since the last order, which parts of the parenting plan you both see differently, whether child support will need to be revisited, and how a proposed schedule reflects your child's best interest. If safety is a concern in your family, safety comes first, and the place to start is 911 or the court, not mediation.

To talk with the practice about a custody modification, call Simple Divorce Mediation at 858-330-1378 for a joint mediation consultation.

About this article. Reviewed by Amy J. Lass, CA Bar No. 246779. Last updated 2026-10-08.