Here's some info-
12026. (a) Section 12025 shall not apply to or affect any citizen of the United States or legal resident over the age of 18 years who resides or is temporarily within this state, and who is not within the excepted classes prescribed by Section 12021 or 12021.1 of this code or Section 8100 or 8103 of the Welfare and Institutions Code, who carries, either openly or concealed, anywhere within the citizen's or legal resident's place of residence, place of business, or on private property owned or lawfully possessed by the citizen or legal resident any pistol, revolver, or other firearm capable of being concealed upon the person. (b) No permit or license to purchase, own, possess, keep, or carry, either openly or concealed, shall be required of any citizen of the United States or legal resident over the age of 18 years who resides or is temporarily within this state, and who is not within the excepted classes prescribed by Section 12021 or 12021.1 of this code or Section 8100 or 8103 of the Welfare and Institutions Code, to purchase, own, possess, keep, or carry, either openly or concealed, a pistol, revolver, or other firearm capable of being concealed upon the person within the citizen's or legal resident's place of residence, place of business, or on private property owned or lawfully possessed by the citizen or legal resident.
Source(s):
Cal. Penal Code §12020 et. seq.