ADU Construction Still Difficult in California

Accessory dwelling units should be easier to build in California, but the process is still slow and complicated in many cities, say housing advocates.

1 minute read

January 22, 2019, 11:00 AM PST

By Camille Fink


Accessory Dwelling Unit

Brett VA / Flickr

California state legislation easing the red tape and lowering the costs of building accessory dwelling units was supposed to spur construction and help with the state’s affordable housing crisis. But, many local municipalities have been slow to get ADU developments moving along, reports Louis Hansen:

Many more residents are requesting applications for ADUs than actually getting construction permits to build, [David] Garcia said. Homeowners often still find the process daunting and filled with unexpected costs. They report getting conflicting guidance from local planners and being hit with high fees for local services and schools.

Housing advocates and developers want cities to do more to help homeowners who want to build the units. The California Renters Legal Advocacy and Education Fund has filed a lawsuit against San Francisco alleging that zoning ordinances prohibit ADUs on most properties in the city and the discretionary review process can hold up projects indefinitely.

While some cities are resisting the ADU changes, Hansen writes that others are pushing forward. For example, San Jose eased zoning restrictions last year, and ADU construction is now permitted on many more lots in the city. 

Thursday, January 17, 2019 in The Mercury 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 11, 2025 - Diana Ionescu

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.

June 8, 2025 - Fast Company

Yellow single-seat Japanese electric vehicle drivign down road.

The Tiny, Adorable $7,000 Car Turning Japan Onto EVs

The single seat Mibot charges from a regular plug as quickly as an iPad, and is about half the price of an average EV.

June 6, 2025 - PC Magazine

People riding bicycles on separated bike trail.

With Protected Lanes, 460% More People Commute by Bike

For those needing more ammo, more data proving what we already knew is here.

1 hour ago - UNM News

Bird's eye view of half-circle suburban street with large homes.

In More Metros Than You’d Think, Suburbs are Now More Expensive Than the City

If you're moving to the burbs to save on square footage, data shows you should think again.

3 hours ago - Investopedia

Color-coded map of labor & delivery departments and losses in United States.

The States Losing Rural Delivery Rooms at an Alarming Pace

In some states, as few as 9% of rural hospitals still deliver babies. As a result, rising pre-term births, no adequate pre-term care and "harrowing" close calls are a growing reality.

June 15 - Maine Morning Star