Fair housing is legally enforced at the federal, state, and local levels. Protects prospects and tenants against housing discrimination in rent or sale based on: Race, color, religion, national origin, sex, familial status, and disability. These groups of people are known as protected classes. Many states also add sexual orientation and other protected classes 4. Housing intended for those age 55 or older. At least 80% of occupied units have one person age 55 or older living in. It is illegal to discriminate against any person because of race, color, religion, sex, handicap, familial status, or national origin. In the sale or rental of housing or residential lots. In the provision of real estate brokerage services. In the advertising the sale or rental of housing. Owner-occupied buildings with no more than four units (residental) Single-family housing sold or rented without the use of a real estate professional. Housing operated by organizations and private clubs that limit occupancy to members.