California Code, Penal Code - PEN § 25605

(a) Section 25400and Chapter 6 (commencing with Section 26350) of Division 5 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 Chapter 2 (commencing with Section 29800) or Chapter 3 (commencing with Section 29900) of Division 9 of this title, 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 handgun.

(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 Chapter 2 (commencing with Section 29800) or Chapter 3 (commencing with Section 29900) of Division 9 of this title, or Section 8100 or 8103 of the Welfare and Institutions Code, to purchase, own, possess, keep, or carry, either openly or concealed, a handgun 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.

(c) Nothing in this section shall be construed as affecting the application of Sections 25850 to 26055, inclusive.