The Fair Housing Act (FHA) was enacted as Title VIII of the Civil Rights Act of 1968 and has been amended several times, most significantly in 1988 when disability and familial status were added as protected classes. The law applies broadly: advertising, tenant screening, lease terms, maintenance responsiveness, and eviction practices all fall under its scope. A landlord who enforces a stricter credit standard against applicants of one nationality than another, or who tells a family with children that a unit is unavailable when it is not, is in violation regardless of intent. Discriminatory effect matters as much as discriminatory intent under federal interpretation, meaning a policy that appears neutral on its surface can still be unlawful if it disproportionately excludes a protected class without a legitimate business justification.
For property managers, the highest-risk areas are tenant screening criteria and advertising language. Blanket income multiplier rules such as requiring rent-to-income ratios that no reasonable voucher holder could meet, or blanket criminal background bans with no individualized assessment, have drawn HUD enforcement actions in recent years. Advertising that uses language like 'ideal for young professionals' or 'quiet adult community' signals a preference against families with children and can trigger a complaint. On the disability side, landlords are required to grant reasonable accommodations (policy changes, like allowing a service animal in a no-pets building) and reasonable modifications (physical changes to the unit, typically at the tenant's expense in private housing). Refusing a documented request without engaging in an interactive process is a common and costly mistake.
Beyond the federal law, most states and many cities layer on additional protected classes. California, for example, protects source of income, marital status, sexual orientation, and immigration status. New York City adds lawful occupation. Landlords who own properties in multiple jurisdictions must track each local overlay, because the federal floor is not the full picture. The practical standard is to build one consistent, documented screening policy that applies the same criteria to every applicant in the same order, keep records of every denial with the documented reason, and train anyone who interacts with applicants on what they can and cannot say. A single off-script comment in a showing can become the centerpiece of an administrative complaint.
Worked example
A property manager in Denver receives two rental applications for the same two-bedroom unit. Applicant A is a married couple with two children, a credit score of 680, and verified monthly income of $5,400 against a $1,600 rent (3.4x ratio). Applicant B is a single professional with a 710 credit score and income of $6,200 (3.9x ratio). The manager has a written policy requiring a minimum 620 credit score and 3x rent-to-income ratio. Both applicants meet the written criteria. If the manager rejects Applicant A and approves Applicant B without documenting a specific, policy-grounded reason beyond "better fit," they risk a familial status complaint. The documented screening policy must be applied identically: both applicants qualify on the stated criteria, and the manager should offer the unit to whichever complete application arrived first, with that timestamp recorded in the file. If the manager genuinely prefers the higher income, the policy itself must state a higher threshold, and that threshold must be applied to every applicant uniformly.