Here is section 805 of the Fair Housing Act.
(a) In general. It shall be unlawful for any person or other entity whose business includes engaging in residential real estate-related transactions to discriminate against any person in making available such a transaction, or in the terms or conditions of such a transaction, because of race, color, religion, sex, handicap, familial status, or national origin.
(b) Definition. As used in this section, the term "residential real estate-related transaction" means any of the following:
(1) The making or purchasing of loans or providing other financial assistance-
(A) for purchasing, constructing, improving, repairing, or maintaining a dwelling; or
(B) secured by residential real estate.
(2) The selling, brokering, or appraising of residential real property.
(c) Appraisal exemption. Nothing in this subchapter prohibits a person engaged in the business of furnishing appraisals of real property to take into consideration factors other than race, color, religion, national origin, sex, handicap, or familial status.
Section 802 defines "handicap" as follows:
(h) "Handicap" means, with respect to a person-
(1) a physical or mental impairment which substantially limits one or more of such person's major life activities,
(2) a record of having such an impairment, or
(3) being regarded as having such an impairment, but such term does not include current, illegal use of or addiction to a controlled substance (as defined in section 802 of title 21).
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Opinions expressed are my own and not necessarily those of my employer. They are not legal advice.