San Diego to Rescind Multi-Unit ADU Rule

The city wants to close a loophole that allowed developers to build apartment buildings on single-family lots as ADUs.

1 minute read

March 9, 2025, 9:00 AM PDT

By Diana Ionescu @aworkoffiction


Aerial view of single-family homes with swimming pools in San Diego, California.

Justin / Adobe Stock

San Diego is reining in its accessory dwelling unit (ADU) regulations after a series of complaints from residents about the size of new buildings, reports Andrew Keatts in Axios.

The city’s ADU bonus program allows property owners that include income-restricted units to build additional ADUs, effectively letting developers build full apartment buildings on single-family lots. “The council voted 6-3 to direct city planners to return within 90 days with a repeal of the program in single-family zones that tend to have the largest lot sizes, which made them susceptible to ‘outlier’ projects that generated the most opposition.” The council also directed city staff to come up with reforms to the ADU program that could include infrastructure fees.

Keatts points out that the opposition in this case didn’t come from wealthy white homeowners; some residents worry that the movement will perpetuate inequities and displace longtime community members. “Opposition Tuesday came specifically from residents of District 4, the city's historically black community that has been hit especially hard with bonus ADU projects because many of its single-family neighborhoods have large lot sizes,” Keatts notes. 

Tuesday, March 4, 2025 in Axios

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

Get top-rated, practical training

Wastewater pouring out from a pipe.

Alabama: Trump Terminates Settlements for Black Communities Harmed By Raw Sewage

Trump deemed the landmark civil rights agreement “illegal DEI and environmental justice policy.”

April 13, 2025 - Inside Climate News

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.

April 16, 2025 - Diana Ionescu

Blue and white Seattle Link light rail train exiting concrete Downtown Bellevue Tunnel in Bellevue, WA.

Why Should We Subsidize Public Transportation?

Many public transit agencies face financial stress due to rising costs, declining fare revenue, and declining subsidies. Transit advocates must provide a strong business case for increasing public transit funding.

April 7, 2025 - Todd Litman

Two people on bikes in red painted bike lane with bus in traffic lane next to them.

Understanding Road Diets

An explainer from Momentum highlights the advantages of reducing vehicle lanes in favor of more bike, transit, and pedestrian infrastructure.

3 hours ago - Momentum Magazine

Aerial view of large warehouses across from development of suburban single-family homes in Jurupa, California with desert mountains in background.

New California Law Regulates Warehouse Pollution

A new law tightens building and emissions regulations for large distribution warehouses to mitigate air pollution and traffic in surrounding communities.

4 hours ago - Black Voice News

Purple Phoenix light rail train connected to overhead wires at sunset.

Phoenix Announces Opening Date for Light Rail Extension

The South Central extension will connect South Phoenix to downtown and other major hubs starting on June 7.

5 hours ago - Arizona Republic