One Year Into Brazil’s ‘Hostile Architecture’ Ban

A recent law prohibits ‘defensive’ architecture designed to keep people away from buildings or public spaces.

1 minute read

December 31, 2024, 8:00 AM PST

By Diana Ionescu @aworkoffiction


Spikes on building designed to prevent people from sitting.

Ajdin Kamber / Adobe Stock

It’s been one year since Brazil passed a law banning “hostile architecture,” infrastructure designed to prevent people from sitting or lying in public spaces. Hostile architecture is widely used around the world to limit access for people deemed ‘undesirable,’ explains Raphael Tsavkko Garcia explains in Next City.

The decree stipulates measures to curb the use of hostile materials, structures, equipment and construction techniques in open spaces for public use. It also requires urban planning tools and policies, such as zoning regulations and building codes, to help prevent the use of hostile architectural elements.

However, some cities have been slow to implement the law, and experts say hostile architecture or “defensive design” is part of a broader social problem. “Architects Elenara Stein Leitão, Oscar Muller and Vinicius Gonçalves tell Next City that hostile architecture is just one facet of ‘a society that focuses on security, often the fruit of social exclusion, in which it would be possible to differentiate into two strands: the security of those who own property and the expulsion of the undesirables.’”

Monday, December 30, 2024 in Next City

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Cover CM Credits, Earn Certificates, Push Your Career Forward

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

June 11, 2025 - Diana Ionescu

Metrorail train pulling into newly opened subterranean station in Washington, D.C. with crowd on platform taking photos.

Congressman Proposes Bill to Rename DC Metro “Trump Train”

The Make Autorail Great Again Act would withhold federal funding to the system until the Washington Metropolitan Area Transit Authority (WMATA), rebrands as the Washington Metropolitan Authority for Greater Access (WMAGA).

June 2, 2025 - The Hill

Large crowd on street in San Francisco, California during Oktoberfest festival.

The Simple Legislative Tool Transforming Vacant Downtowns

In California, Michigan and Georgia, an easy win is bringing dollars — and delight — back to city centers.

June 2, 2025 - Robbie Silver

Street scene in Kathmandu, Nepal with yellow minibuses and other traffic.

The Small South Asian Republic Going all in on EVs

Thanks to one simple policy change less than five years ago, 65% of new cars in this Himalayan country are now electric.

30 minutes ago - Fast Company

Bike lane in Washington D.C. protected by low concrete barriers.

DC Backpedals on Bike Lane Protection, Swaps Barriers for Paint

Citing aesthetic concerns, the city is removing the concrete barriers and flexposts that once separated Arizona Avenue cyclists from motor vehicles.

2 hours ago - The Washington Post

Bird's eye view of studio apartment design.

In These Cities, Most New Housing is Under 441 Square Feet

With loosened restrictions on “micro-housing,” tiny units now make up as much as 66% of newly constructed housing.

4 hours ago - Smart Cities Dive