One Obstacle to ADU Construction in California: The Price of Permits

The price of a permit to build an accessory dwelling units in the city of Thousand Oaks in Southern California is prohibitive—putting the permitting fee in opposition to the stated intent of the city's zoning code and state law.

1 minute read

January 30, 2018, 11:00 AM PST

By James Brasuell @CasualBrasuell


California

Niceley / Wikimedia Commons

It's rare that we post a submission from the letters to the editor section of a newspaper's editorial page, but a letter by Trevor Hughes to the Thousand Oaks Acorn is informative of how California's 2016 law, SB 1069, is playing out at the local level.

According to Hughes, AB 1069 paved the way for Thousand Oaks to adopt accessory dwelling unit criteria—a development that he welcomed and hoped to take advantage of at his home as his parents age. However, Hughes reports he was "shocked and appalled to discover that the permitting fees alone in Thousand Oaks are $13,190 to $26,325." According to Hughes, that explains why only 11 property owners have applied for ADUs in Thousand Oaks.

Hughes is responding to a news article by Becca Whitehall that examines the slow response to the new ADU rules in Thousand Oaks without settling on an explanation for why residents haven't sought more permits.

The Thousand Oaks example is not the first reported case of localities struggling to meet the mandates of the state law. Irvin Dawid reported in December 2017 on the example of Santa Rosa. On the other hand, a recent study by the Terner Center for Housing Innovation at the University of California, Berkeley found evidence of rapid growth in ADU permitting in other cities since the adoption of the law. 

Tuesday, January 30, 2018 in Thousand Oaks Acorn

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

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

October 28, 2026 - Zachary Whalen

A car drives through a puddle, making a large splash. Rain pours down.

California plans to bury El Niño’s downpour

If the state plays its cards right, it may be able to store a billion acre-feet of El Niño’s water in aquifers.

October 28, 2026 - Grist

Lake Powell with much of the water evaporated.

Desperate measures: Advocates weigh draining Lake Powell to fill Colorado River

Draining the reservoir could reduce evaporation losses by a couple hundred thousand acre-feet.

October 30, 2026 - Yale Environment 360

People vote in Chicago behind blue privacy screens

Chicago voters approve permanent festival grounds, penalty for vacant property owners

Currently, major summer and fall festivals take over public parks for weeks at a time, drawing criticism from nearby residents

November 5 - Block Club Chicago

Mayor Zohran Mamdani speaks into a microphone. He wears a gray suit.

NYC votes to cut outdoor dining red tape, speed up permitting

New York City also voted to allow the Department of Transportation to begin work on urgent projects before notifying elected officials.

November 5 - The City Reporter

People in Los Angeles going to the polls, following a sign with an "I Voted" design

California appears to reject Prop. 45

The proposition would have expanded the projects that qualify for a streamlined environmental review, effectively paring down the California Environmental Quality Act.

November 5 - Cal Matters