California Civil Code Section 3342 makes dog owners strictly liable for bites that occur in public places or when the victim was lawfully on private property. Strict liability means the owner cannot defend by saying they did not know the dog was dangerous, that the dog had never bitten anyone before, or that they took precautions to restrain it. The bite, the lawful presence of the victim, and the ownership of the dog establish liability. No prior history of aggression is required. This is significantly more protective for victims than the one-bite rule that applies in many other states, and it makes California dog bite claims more straightforward to pursue than personal injury claims in most other contexts.

What Lawfully Present Means and Where the Defense Lies

The strict liability statute applies when the victim was in a public place or lawfully on private property at the time of the bite. A person is lawfully on private property when they are there with the owner's express or implied permission, which includes mail carriers, delivery drivers, invited guests, and service workers performing work on the property. A trespasser is not lawfully present and is not protected by the strict liability statute. In practice, this defense is narrower than dog owners expect. A neighbor who entered the yard to retrieve a ball that landed there, a child who wandered through an unfenced yard, and a postal worker who entered through an unlocked gate are all typically lawfully present.

Landlord Liability When the Landlord Knew of the Dog

When the dog's owner is a tenant rather than a property owner, the landlord may also be liable if they knew the dog was dangerous and had the ability to require its removal under the lease. California courts have held that a landlord who was on notice of a tenant's dangerous dog and did not act breaches a duty of reasonable care to other tenants and to lawful visitors. Evidence of landlord notice typically comes from prior incident reports, complaints from other tenants, and any communications between the landlord and the dog-owning tenant about the animal's behavior.

The Damages Case: Physical Injury and Psychological Harm

Dog bite damages include the emergency treatment costs, wound care, reconstructive surgery for significant lacerations, and the cost of any physical therapy for hand or extremity injuries that affect function. Serious bites, particularly those involving the face or requiring multiple surgical procedures, produce permanent scarring that is compensable as a non-economic damage under California law. The psychological consequences of a serious dog attack are also recoverable. Post-traumatic stress responses, phobias, and anxiety that develop after a traumatic attack are clinical conditions treated by licensed mental health professionals, and the cost of that treatment plus the non-economic harm it represents are part of the complete damages case. The California Department of Public Health's dog bite prevention information documents the frequency and injury profile of serious dog bites in California.