The laws prohibiting discrimination in housing include state law, California Government Code §§ 12921, 12926, 12927, 12955, California Civil Code §§ 51, 52, 53 and federal law, 42 U.S.C. § 3601 et seq. California Government Code § 12955 states as follows:
It shall be unlawful:
(a) For the owner of any housing accommodation to discriminate against or harass any person because of the race, color, religion, sex, gender, gender identity, gender expression, sexual orientation, marital status, national origin, ancestry, familial status, source of income, disability, or genetic information of that person.
California Government Code § 12927 states as follows:
As used in this part in connection with housing accommodations, unless a different meaning clearly appears from the context: …
(c) (1) “Discrimination” includes refusal to sell, rent, or lease housing accommodations; includes refusal to negotiate for the sale, rental, or lease of housing accommodations; includes representation that a housing accommodation is not available for inspection, sale, or rental when that housing accommodation is in fact so available;
… includes harassment in connection with those housing accommodations;
… includes the refusal to permit, at the expense of the disabled person, reasonable modifications of existing premises occupied or to be occupied by the disabled person, if the modifications may be necessary to afford the disabled person full enjoyment of the premises, except that, in the case of a rental, the landlord may, where it is reasonable to do so condition permission for a modification on the renter’s agreeing to restore the interior of the premises to the condition that existed before the modification (other than for reasonable wear and tear), and includes refusal to make reasonable accommodations in rules, policies, practices, or services when these accommodations may be necessary to afford a disabled person equal opportunity to use and enjoy a dwelling.
42 U.S.C. § 3604 (United States Code) states:
As made applicable by section 3603 of this title and except as exempted by sections 3603(b) and 3607 of this title, it shall be unlawful—
(a) To refuse to sell or rent after the making of a bona fide offer, or to refuse to negotiate for the sale or rental of, or otherwise make unavailable or deny, a dwelling to any person because of race, color, religion, sex, familial status, or national origin.
(b) To discriminate against any person in the terms, conditions, or privileges of sale or rental of a dwelling, or in the provision of services or facilities in connection therewith, because of race, color, religion, sex, familial status, or national origin.
(c) To make, print, or publish, or cause to be made, printed, or published any notice, statement, or advertisement, with respect to the sale or rental of a dwelling that indicates any preference, limitation, or discrimination based on race, color, religion, sex, handicap, familial status, or national origin, or an intention to make any such preference, limitation, or discrimination.
(d) To represent to any person because of race, color, religion, sex, handicap, familial status, or national origin that any dwelling is not available for inspection, sale, or rental when such dwelling is in fact so available.
(e) For profit, to induce or attempt to induce any person to sell or rent any dwelling by representations regarding the entry or prospective entry into the neighborhood of a person or persons of a particular race, color, religion, sex, handicap, familial status, or national origin.
(f)(1) To discriminate in the sale or rental, or to otherwise make unavailable or deny, a dwelling to any buyer or renter because of a handicap of— …
(2) To discriminate against any person in the terms, conditions, or privileges of sale or rental of a dwelling, or in the provision of services or facilities in connection with such dwelling, because of a handicap of—…
(3) For purposes of this subsection, discrimination includes—
(A) a refusal to permit, at the expense of the handicapped person, reasonable modifications of existing premises occupied or to be occupied by such person if such modifications may be necessary to afford such person full enjoyment of the premises except that, in the case of a rental, the landlord may where it is reasonable to do so condition permission for a modification on the renter agreeing to restore the interior of the premises to the condition that existed before the modification, reasonable wear and tear excepted.
(B) a refusal to make reasonable accommodations in rules, policies, practices, or services, when such accommodations may be necessary to afford such person equal opportunity to use and enjoy a dwelling; …