Self-Defense:
Castle Doctrine in California

California's Castle Doctrine is codified in Penal Code Section 198.5 ^[1]. The statute provides that any person using force intended or likely to cause death or great bodily injury within their own residence against another person who is not a member of the household and who unlawfully and forcibly enters or has unlawfully and forcibly entered the residence is presumed to have held a reasonable fear of imminent peril of death or great bodily injury. This presumption is significant because it shifts the burden in a self-defense case.

The Presumption of Reasonable Fear

Section 198.5 creates a rebuttable presumption that the resident's fear was reasonable. This means that if someone breaks into your home and you use deadly force, the prosecution must overcome the presumption that you acted reasonably. The presumption applies only when the intruder has "unlawfully and forcibly" entered. It does not apply to persons who enter through an unlocked door without force or persons who are lawful occupants or members of the household. An initial aggressor's right to self-defense is subject to withdrawal requirements and an exception for sudden escalation from nondeadly to deadly force that prevents withdrawal.

No Duty to Retreat in the Home

California law does not impose a duty to retreat within your own home. Under the Castle Doctrine, you may stand your ground inside your residence against an unlawful intruder. CALCRIM 505 (the jury instruction for justifiable homicide in self-defense) ^[2] instructs jurors that a defendant is not required to retreat and has the right to stand their ground and defend themselves if reasonably necessary.

No Duty to Retreat Outside the Home

CALCRIM 505 states that a defendant is not required to retreat in lawful self-defense, including outside the home. CALCRIM 506 gives the no-retreat instruction for defense of people in the home. CALCRIM 505 explicitly states that a defendant "is not required to retreat" and "is entitled to stand his or her ground and defend himself or herself and, if reasonably necessary, to pursue an assailant until the danger of death or great bodily injury has passed. This is so even if safety could have been achieved by retreating." ^[2] CALCRIM 506 likewise states that a defendant is not required to retreat when defending a person in the home ^[3].

CALCRIM 505 directs jurors to consider the circumstances known to the defendant when assessing whether the belief in imminent danger was reasonable. The instruction states that a defendant may stand their ground even if safety could have been achieved by retreating.

Scope of "Residence"

Section 198.5 applies within the person's residence. For a hotel room or other temporary dwelling, the question is whether the person is a resident with a reasonable expectation of protection against unwanted intruders and whether the other statutory conditions are met. It generally does not extend to the yard, driveway, detached garage, or other areas outside the structure of the home itself. The exact boundaries can be fact-specific and subject to jury determination.

Proportionality

Even under the Castle Doctrine, the force used must be proportional to the threat. Deadly force may be justified when you reasonably believe you or someone else faces imminent danger of death or great bodily injury, reasonably believe immediate deadly force is necessary, and use no more force than reasonably necessary. The right to use force continues only as long as the danger exists or reasonably appears to exist. When an attacker withdraws or no longer appears capable of inflicting injury, the right to use force ends.

Key Limitations

- The presumption does not apply against household members or persons with a right to be present
- The entry must be both "unlawful" and "forcible" to trigger the presumption
- Self-defense generally requires an initial aggressor to stop fighting and communicate withdrawal, with an exception for sudden escalation from nondeadly to deadly force that prevents withdrawal
- The doctrine does not provide immunity from prosecution; it provides a presumption that can be used as a defense