Exclusionary Zoning

What Is Exclusionary Zoning?

Exclusionary zoning is a label for local land-use rules that prevent lower-cost homes from being built in a community. The rules rarely say so outright. Instead, they set requirements that only expensive housing can meet. Common examples include:

• Banning apartments, duplexes, or townhouses in most residential areas
• Requiring large minimum lot sizes or minimum home sizes
• Prohibiting or restricting manufactured homes
• Setting low density caps, strict height limits, or heavy parking requirements

A 2021 HUD report observed that restrictions on apartments, manufactured housing, and other low-cost housing types are nearly universal across the country.

How Exclusionary Zoning Works

Zoning decides what can be built where. When most residential land allows only one detached house per large lot, the price of entry to a neighborhood becomes the price of that land plus a house. Households that could afford an apartment or a small home on a small lot are effectively shut out. Research published in HUD’s Cityscape journal describes these rules as widely recognized contributors to housing supply constraints and high housing costs.

The legal foundation dates to Village of Euclid v. Ambler Realty Co. (1926). The Supreme Court upheld zoning as a valid use of local police power and accepted the view that apartment buildings could harm neighborhoods of detached houses. Economists such as William Fischel have argued that homeowners, seeking to protect what is usually their largest asset, push local governments toward rules that limit new development.

Exclusionary Zoning and Fair Housing

Exclusionary zoning raises civil rights questions as well as cost questions. In Texas Department of Housing and Community Affairs v. Inclusive Communities Project (2015), the Supreme Court said that suits targeting zoning laws that unfairly exclude minorities without sufficient justification lie at the “heartland” of disparate-impact liability under the Fair Housing Act. It cited earlier cases that struck down local bans on new multifamily housing.

That ruling still stands, but HUD’s own regulations are in flux. In January 2026, HUD proposed removing its own disparate-impact regulations and leaving the question to the courts. The rule was still at the proposal stage in August 2026, when HUD reopened public comment through October 9, 2026.

States have responded too. New Jersey’s Mount Laurel court decisions, beginning in 1975, required towns to make room for low- and moderate-income housing and later gave builders a legal remedy against exclusionary ordinances. More recently, Oregon has required many of its cities to allow duplexes and other “missing middle” homes on lots zoned for single-family houses.

Defenders of local density limits, echoing the reasoning in Euclid, point to traffic, noise, and the character of residential neighborhoods. Critics counter that the costs fall on renters, workers, and families priced out. For the broader policy debate, see zoning reform and the YIMBY movement.