Child Support in Roseville and Placer County, California

Placer County anchors part of the Sacramento region, serving families in Roseville, Rocklin, and Lincoln. Child support cases are handled by the Superior Court of California, County of Placer and the county's Local Child Support Agency.

The state uses a single uniform guideline (Family Code section 4055) to calculate support. It looks mainly at both parents' net disposable incomes and the timeshare, the percentage of time the child is with each parent. Placer County uses that same presumptively correct formula.

There are two paths to a support order. One parent can file a Request for Order (Form FL-300) along with an Income and Expense Declaration (Form FL-150) inside a divorce, parentage, or custody case, or the Local Child Support Agency (part of the California Department of Child Support Services) can open a case to set up and enforce support. Only the local logistics differ from county to county.

Because the number turns on income and timeshare, estimating early helps. Our free California child support calculator gives you a starting figure, and parents who agree can submit a written stipulation for a judge to sign.

How child support is calculated in California

California sets child support with a statewide uniform guideline (Family Code section 4055) that applies the same way in Placer County as everywhere else. The formula is based mainly on two things:

1. Both parents' net disposable incomes.
2. The percentage of time the child spends with each parent (the timeshare).

The guideline amount is presumed to be correct, and courts use a calculator to run the numbers. Because the result depends on accurate income, the Income and Expense Declaration (Form FL-150) you file is what drives your number.

Where child support cases are handled in Placer County

Child support in Placer County is handled through the Superior Court of California, County of Placer, and the county's Local Child Support Agency, which is part of the California Department of Child Support Services. There are two common paths:

1. Either parent files a Request for Order (Form FL-300) with an Income and Expense Declaration (Form FL-150) inside a divorce, parentage, or custody case.
2. The Local Child Support Agency opens a case to establish, collect, and enforce support, often at no cost to the parents.

Because courthouse and local agency office details change over time, confirm current details using the official California Courts court finder:

Find the Placer County Superior Court (official California Courts finder)

Local notes for Placer County

In Placer County, family law matters run through the Superior Court and the county's Local Child Support Agency handles agency cases. Use the official California Courts court finder to confirm the right courthouse, and look up the agency through the California Department of Child Support Services, before filing.

The county's self-help center helps parents who represent themselves complete Form FL-150 and understand court procedure, but staff cannot give legal advice about your specific case. Because the guideline result is driven by the income you report, filling out the Income and Expense Declaration accurately is the most important step.

Child support in California generally continues until the child turns 18, or 19 if the child is still a full-time high school student living at home and not self-supporting. Either parent can ask the court to modify support when income or the parenting timeshare changes meaningfully.

Official child support resources in Placer County

Placer County Superior Court's family law self-help services are based in Roseville rather than in the county seat of Auburn: the Self-Help Center and Family Law Facilitator's Office operate out of the Howard G. Gibson Courthouse in the Bill Santucci Justice Center. The Placer County Law Library in Auburn holds legal self-help materials as a separate resource, but self-help appointments themselves are handled at the Roseville courthouse.

Placer County's Child Support Services, the county's local child support agency, runs its main office out of Rocklin, with a second office serving the Tahoe basin.

Under the court's Local Rule 10.27, electronic filing is mandatory in civil and family law cases for attorneys and represented parties, according to the court's own e-filing FAQ. Self-represented litigants are exempt from that mandate and may still file on paper.

• Placer County Superior Court: Self-Help
• Placer County Superior Court: eFiling
• Placer County Child Support Services

Local details reviewed July 2026. Offices and locations can change, so confirm with the official sites above before you file.

Placer County Child Support FAQs