Family Code 3011 California: Best Interest of the Child Factors

Every custody decision in California starts and ends with Family Code Section 3011. It is the single most important statute for any parent in a contested custody case because it tells you exactly what the judge is scoring you on — and what evidence they need to see.

What Section 3011 Requires

Family Code Section 3011 directs the court to consider and give weight to the following factors when determining the best interests of the child:

Factor 1: Health, Safety, and Welfare

This is the court's absolute primary concern. The judge evaluates how each proposed custody arrangement affects the child's physical safety and emotional stability.

What this means in practice: the parent who can show a stable home environment, consistent routines, proximity to the child's school, and involvement in the child's daily life has an advantage. Stability matters — a parent who has moved three times in two years or has rotating partners in the home faces scrutiny.

Factor 2: History of Abuse

The court must evaluate any history of physical or emotional abuse by a parent or household member against the child, a sibling, the other parent, or a current spouse or partner.

This factor casts a wide net. Abuse does not have to be directed at the child to count — domestic violence between the parents is relevant. However, to prevent unsubstantiated claims from skewing outcomes, the court may require independent corroboration: police reports, Child Protective Services records, reports from medical facilities, or declarations from social welfare agencies.

A finding of domestic violence triggers the separate — and much more powerful — presumption under Family Code Section 3044.

Factor 3: Substance Abuse

The court considers any habitual or regular use of illegal controlled substances, or habitual abuse of alcohol or prescribed medications, by either parent.

Like abuse allegations, substance abuse claims require corroboration. The court looks for clinical assessments, drug test results, DUI convictions, or treatment records. Unsubstantiated allegations without supporting evidence carry little weight and can backfire — judges view unsupported claims as a sign of bad-faith litigation tactics.

Factor 4: Contact and Stability

The court evaluates the nature and amount of contact the child has with each parent, and emphasizes the importance of continuity in the child's relationships and connections to school, home, and community.

This factor favors the parent who has been the child's primary day-to-day caregiver and the parent who has deeper roots in the child's current neighborhood. If one parent is proposing to relocate and the other is staying in the child's current school district, Factor 4 weighs against the move.

It also works against the parent who voluntarily reduces their custody time. If you stop exercising your visitation — even because your child says they do not want to come — the court reads that as reduced contact, and the timeshare calculation reflects it.

Factor 5: The Child's Preference

Under Family Code Section 3042, if a child is of "sufficient age and capacity to reason" to form an intelligent preference, the court must consider the child's wishes. There is no specific minimum age, but children aged 14 and older have a statutory right to address the court directly unless the judge determines it would harm the child.

For younger children, judges may receive the child's preferences through a CCRC counselor's report, a custody evaluator, or minor's counsel (an attorney appointed to represent the child's interests under Family Code Section 3150).

The child's preference is never the sole determining factor. A teenager who says they want to live with the permissive parent who does not enforce homework or curfew may not get that wish if the court concludes the other arrangement better serves the child's health and welfare.

How Judges Actually Weigh These Factors

Section 3011 does not assign point values. Judges have broad discretion in how they balance the five factors against each other. But in practice, the hierarchy is consistent:

1. Safety comes first — any credible evidence of abuse or substance issues overrides almost everything else.
2. Stability is the tiebreaker — when both parents are fit and safe, the parent who provides more consistent structure, involvement, and community connections tends to prevail.
3. The child's voice gains weight with age — a 16-year-old's preference is harder to override than a 7-year-old's.

Using Section 3011 in Your Case

Whether you are preparing for CCRC mediation, a custody evaluation, or an evidentiary hearing, Section 3011 is your preparation checklist. For each factor, ask yourself:

• What evidence do I have that supports my proposal?
• What documentation exists (school records, medical logs, communication records)?
• How does my proposed schedule serve the child's health, safety, and routine better than the alternative?

The California Child Custody & Parenting Plan Guide includes a best-interests preparation worksheet organized around each Section 3011 factor — helping you build a documented, child-centered case before your first mediation session or court appearance.

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