California Cities Going the Extra Mile to Support ADU Construction

A few jurisdictions have gone beyond conformity with state law to encourage the construction of accessory dwelling units in the state of California, like in San Diego.

2 minute read

August 17, 2020, 8:00 AM PDT

By James Brasuell @CasualBrasuell


Accessory Dwelling Unit

Nicolás Boullosa / Flickr

Cinnamon Janzer reports on San Diego County's approach to Accessory Dwelling Units, deployed last fall to further support ADU development beyond the allowances made by state law, by "offering free, pre-approved ADU floor plans and waiving $15,000 in permit and development fees to reduce the costs associated with construction."

Janzer quotes Gary Geiler, the development services director for the city of San Diego, to explain what the city is doing to support ADU construction in a city with notoriously high housing prices, much like the rest of the cities in the state. 

“We’ve had companion unit regulations on the books since the 90s,” Geiler says, “but they were more design-oriented and required conditional use permits. We didn’t get a lot of applications, maybe 10 in a year.” These days, those numbers are way up. “In 2017… we got an increase of over 100 applications that first year, so we said, ‘OK, we’re onto something here.’” The city has since done away with even more fees. “The applications increased even further,” Geiler says. “We had probably over 300 applications in 2018 and over 600 in 2019. So far we have about 200 new units this year and about 1,000 units applied for.”

Janzer also speaks with Caitlin Bigelow, a resident of the nearby city of La Mesa, who started the company Maxable to offer ADU consulting and services to Californians, who finds room for improvements for both the city and the county's efforts, finding fault especially with the pre-approved floor plans, and points to the example of San Jose for a model for improvement. 

"She’d like to see San Diego take an approach more like San Jose’s where the city opened up the plan design process to local design professionals and created something of a library of plan choices that offer more variety to meet the needs of different homeowners," reports Janzer.

Tuesday, August 4, 2020 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

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

High-rise apartment buildings in Waikiki, Hawaii with steep green mountains in background.

Study: Maui’s Plan to Convert Vacation Rentals to Long-Term Housing Could Cause Nearly $1 Billion Economic Loss

The plan would reduce visitor accommodation by 25% resulting in 1,900 jobs lost.

April 6, 2025 - Honolulu Civil Beat

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 10, 2025 - Diana Ionescu

Converted garage to housing unit in London, UK.

Grand Rapids Mayor Proposes Garage Conversion Plan

The mayor says allowing homeowners to convert garages to dwelling units could alleviate the city’s housing shortage.

1 hour ago - Fox 17

Curb cut at corner of sidewalk with yellow panel with bumps to indicate wheelchair ramp.

Baltimore Ordered to Improve Sidewalk Accessibility

The city is one of many to face lawsuits for failing to comply with the Americans with Disabilities Act.

2 hours ago - Smart Cities Dive

Aerial view of Brampton, Ontario, Canada.

This Toronto Suburb Has More Bus Riders Than Columbus, Ohio

Brampton, Ontario used gradual improvements in service to prove that if you build it, they will ride.

3 hours ago - Bloomberg CityLab