Negligence claims often involve determining whether someone failed to exercise reasonable care under the circumstances. In California, negligence per se allows certain violations of statutes, ordinances, or regulations to establish a presumption that a defendant failed to meet the applicable standard of care.

These claims may arise from traffic accidents, workplace incidents, property hazards, and other situations involving safety-related laws. Courts examine the alleged violation, the purpose of the legal provision, and its connection to the plaintiff’s injuries.

Understanding Negligence Per Se in California

Negligence per se is an evidentiary doctrine that can establish a presumption of negligence when specific statutory conditions are satisfied. California Evidence Code Section 669 identifies the circumstances under which this presumption may apply.

The doctrine does not automatically establish liability whenever someone violates a law. Courts must also consider whether the violation caused the alleged injury and whether the statute was intended to protect against that type of harm.

Identifying the Relevant Legal Violation

Courts begin by examining the statute, ordinance, or regulation allegedly violated by the defendant. The provision must establish a relevant obligation, and the evidence must support a finding that the defendant failed to comply with it.

A violation may involve conduct such as disregarding traffic safety requirements or failing to follow applicable protective regulations. Courts evaluate the specific legal provision rather than assuming that every regulatory violation supports negligence per se.

Examining the Purpose of the Statute

California courts consider whether the injury resulted from the kind of occurrence the law was designed to prevent. This inquiry connects the purpose of the statute to the particular circumstances of the plaintiff’s claim.

Courts also determine whether the injured person belongs to the class of individuals the law was intended to protect. If either requirement is not satisfied, the statutory violation may not support a negligence per se presumption.

Evaluating Causation and Injury

A negligence per se claim requires more than proof that a defendant violated a legal provision. The plaintiff must establish that the violation proximately caused an injury to person or property.

Courts may review accident reports, medical records, witness accounts, and other evidence connecting the alleged violation to the harm. A statutory violation that did not cause the injury generally cannot establish liability through negligence per se.

Considering Excuses for Statutory Violations

California law recognizes circumstances in which a defendant may rebut the presumption of negligence. For example, a defendant may present evidence that compliance was impossible despite reasonable diligence or that compliance would have created a greater risk of harm.

Courts examine whether the explanation qualifies under the applicable legal rules. A defendant’s disagreement with a statutory requirement does not, by itself, excuse a violation.

Determining Liability and Available Damages

When the requirements for negligence per se are satisfied, the doctrine may establish a presumption concerning the defendant’s failure to exercise due care. Courts must still address other necessary elements of the underlying negligence claim.

If liability is established, recoverable damages depend on the injuries and losses supported by the evidence. Courts may also consider comparative fault when the plaintiff’s own conduct contributed to the incident.