The ADU Movement Grows Around the Country

More states and cities are promoting backyard cottages, converted garages, and other add-on units. Are they making an impact?

1 minute read

November 26, 2024, 10:00 AM PST

By Diana Ionescu @aworkoffiction


Rendering of modern black and brown one-story backyard home design

One of the ADU designs pre-approved by Los Angeles. | United Dwelling / United Dwelling 2-Bedroom Backyard Home

The movement to legalize accessory dwelling units (ADUs) in cities and states around the country could have a not-insignificant impact on the housing crisis, writes Ben Ikenson in Yahoo News. “In the last four years, U.S. housing prices have skyrocketed by 47 percent, and longstanding housing shortages culminated in a deficit of more than seven million homes last year, ‘the result of more than a decade of underbuilding relative to population growth,’ according to Realtor.com.”

Now, seven states and more than one hundred local jurisdictions have taken steps to relax regulations around ADUs and promote their construction.

In the first two years after a law supporting ADUs passed in California, close to half of the permits for ADUs were issued in the Los Angeles area. The city has embraced the trend, developing a set of pre-approved plans homeowners can use to cut down on design and permitting costs. “Like its potential uses—multigenerational living, aging-in-place, generating rental income, and more—the housing type comes in various forms. In L.A., garage conversions represent a significant percentage of ADUs, but the state allows for a wide range of ADU possibilities, from fully detached stand-alone structures to junior suites attached to main houses, with separate entrances and kitchenettes.”

Thursday, November 21, 2024 in Yahoo News

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 4, 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

White and yellow DART light rail train in Dallas, Texas with brick building in background.

DARTSpace Platform Streamlines Dallas TOD Application Process

The Dallas transit agency hopes a shorter permitting timeline will boost transit-oriented development around rail stations.

May 28, 2025 - Mass Transit

Rendering of Shirley Chisholm Village four-story housing development with person biking in front.

San Francisco's School District Spent $105M To Build Affordable Housing for Teachers — And That's Just the Beginning

SFUSD joins a growing list of school districts using their land holdings to address housing affordability challenges faced by their own employees.

4 hours ago - Fast Company

Aerial view of Rancho Cucamonga, California with suburban commercial center and large palm trees at sunset with mountains in background.

Car-Centric LA Suburb Looks to a Train-Oriented Future

City leaders in Rancho Cucamonga, the future western terminus of the Brightline West rail line to Las Vegas, want to reimagine the city as a transit-oriented, pedestrian-friendly community.

6 hours ago - Bloomberg CityLab

Ground level view of Alaska Pipeline oil pipeline near Prudhoe Bay, Alaska with bare mountains in background.

New Alaska Bitcoin Mine Would Burn as Much Energy as the State’s Largest Coal Plant

Fueled by “stranded” natural gas, the startup hopes to become the largest in the US, and to make Alaska an industry center.

June 8 - Alaska Beacon

Urban Design for Planners 1: Software Tools

This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.

Planning for Universal Design

Learn the tools for implementing Universal Design in planning regulations.