Legal research for California law firms - Los Angeles, San Francisco, San Diego and Sacramento

Short answer: In California, every published Court of Appeal decision binds every superior court in the state, whichever district it came from. Unpublished opinions generally can't be cited at all. So the research job is to find published decisions with facts like yours, from the Supreme Court of California or any Court of Appeal district, and to read the code section they apply.

California courts by region

Above them all in the state system is the Supreme Court of California. Federal appeals from every California district go to the Ninth Circuit.

Trial courts are the superior courts, one in each of California's 58 counties.

Two rules that shape California research

1. Published Court of Appeal decisions bind every superior court. Under Auto Equity Sales, Inc. v. Superior Court (1962) 57 Cal.2d 450, a superior court must follow published appellate decisions. A Los Angeles judge is bound by a published First District case just as much as by a Second District case. When published decisions conflict, the trial court may choose between them, so finding the split is part of the job.

2. Unpublished opinions are off limits. California Rules of Court, rule 8.1115(a) says an unpublished Court of Appeal or superior court appellate division opinion must not be cited or relied on by a court or a party, with narrow exceptions in rule 8.1115(b) (for example, law of the case or res judicata). Make sure every decision you rely on is published, and check whether review was granted, because that can affect a published opinion's status.

California citation formats

California courts accept the California Style Manual as well as Bluebook-style citations:

• Cal.5th - Supreme Court of California
• Cal.App.5th - published Court of Appeal decisions
• Cal.Rptr.3d - West's California Reporter, which covers both

In California style, the year goes in parentheses after the case name: Auto Equity Sales, Inc. v. Superior Court (1962) 57 Cal.2d 450.

The 29 codes

California's statutes are organized into 29 codes - the Civil Code, Code of Civil Procedure, Evidence Code, Government Code, Labor Code, Penal Code, Vehicle Code and more. The official text is on the Legislature's site, leginfo.legislature.ca.gov.

LegiMatch's statute finder includes the official text of the California codes alongside the U.S. Code, and shows the decisions that cite each section. It's free in every account.

A fact-first workflow for California matters

California employment, premises, consumer and landlord-tenant cases often turn on details: how long a hazard was present, what the employer knew, what notice the tenant received. A fact-first search fits that:

1. Describe the facts in plain English. Example: "Our client, a warehouse worker in Riverside, reported unpaid overtime to her manager and was taken off the schedule two weeks later. The employer says it was a seasonal slowdown."
2. Limit to California, and decide whether federal decisions applying California law help.
3. Keep only published decisions for anything you'll cite.
4. Check treatment and whether review was granted.
5. Read the code sections at issue (here, provisions of the Labor Code) as in force on the relevant date.

LegiMatch returns up to 100 similar decisions for each matter, ranked by a match score that shows how much facts, legal issues, statutes, jurisdiction and recency contributed. Every result is a real decision linked to the court's text. It supports your research; it doesn't replace your judgment or give legal advice.

Frequently asked questions

Is a published decision from another appellate district binding in Los Angeles?

Yes. A published Court of Appeal decision from any district binds all superior courts, including Los Angeles Superior Court. If published decisions conflict, the trial court can choose which to follow.

Can I cite an unpublished California opinion as persuasive authority?

Generally no. Rule 8.1115(a) bars citing unpublished California opinions, apart from the narrow exceptions in rule 8.1115(b). Unpublished federal decisions are governed by different rules.

Which federal court covers Orange County?

The Central District of California, which has a courthouse in Santa Ana.

Where can I read the California codes for free?

On the Legislature's official site, leginfo.legislature.ca.gov, and in LegiMatch's free statute finder.

Sources

• Auto Equity Sales, Inc. v. Superior Court (1962) 57 Cal.2d 450
• California Rules of Court, rule 8.1115
• Judicial Council of California, Courts of Appeal (courts.ca.gov)
• California Legislative Information (leginfo.legislature.ca.gov)
• United States Courts, court locator (uscourts.gov)