Disparate Impact

What Is Disparate Impact?

Disparate impact is a way of proving housing discrimination without proving intent. Under the Fair Housing Act, a policy that looks neutral on its face can still be unlawful if it falls more heavily on people because of race, color, religion, sex, disability, familial status, or national origin, and it has no sufficient justification.

It differs from disparate treatment, which means deliberately treating someone differently because of a protected trait. Disparate impact asks what a rule does, not why it was adopted.

How Disparate Impact Works

HUD’s regulation, 24 CFR 100.500, lays out a three-step test:

1. The plaintiff must show that a specific practice caused, or predictably will cause, a discriminatory effect.
2. The defendant can then show that the practice is necessary to achieve a substantial, legitimate, nondiscriminatory interest.
3. The plaintiff can still win by showing that the interest could be served by another practice with a less discriminatory effect.

In Inclusive Communities (2015), the Supreme Court held that disparate-impact claims are cognizable under the Fair Housing Act. It also set limits. A statistical disparity alone is not enough; plaintiffs must point to a policy that caused it. The Court said the doctrine targets “artificial, arbitrary, and unnecessary barriers,” not valid government priorities.

Example

The Court named zoning that unfairly excludes minorities without sufficient justification as the “heartland” of disparate-impact liability. It cited Huntington v. Huntington Branch, NAACP (1988), in which a New York town’s zoning law preventing construction of multifamily rental housing was invalidated.

As a hypothetical, suppose a city bans apartments everywhere except one small district. If renters there are disproportionately from one racial group and the ban keeps them out of the rest of the city, that group could bring a claim. The city would then have to show the ban serves a real, substantial interest that a less exclusionary rule could not meet.

Criticisms and Limitations

Critics argue that disparate-impact liability can penalize lawful business and lending decisions and push decision-makers toward considering race. Supporters say it reaches discrimination that is hard to prove directly, including unconscious bias and policies that entrench segregation.

The federal stance is in flux. HUD first issued its rule in 2013, rewrote it in 2020 in a version a federal court blocked before it took effect, and reinstated the 2013 standard in 2023. In January 2026, HUD proposed deleting 24 CFR 100.500 and leaving the question to the courts. In August 2026, it proposed also removing disparate-impact provisions from its Title VI rules for recipients of HUD funding, with comments due October 9, 2026. Neither change was final as of October 1, 2026. HUD says removing the rule would not change anyone’s rights or obligations. Either way, the 2015 Supreme Court decision remains binding on the courts.