Walnut Creek
Walnut Creek is a city in Contra Costa County, California, United States, located in the East Bay region of the San Francisco Bay Area, about 16 miles (26 kilometers) east of the city of Oakland. Walnut Creek has a total population of 70,127 per the 2020 census
Walnut Creek ADU Permits and Regulations Resources
ADU’s are discussed in Article 1, starting at Chapter 10-2.3.101
Learn about ADU regulations in Walnut Creek
the average rent for a 2-bedroom apartment in Walnut Creek, CA is $2,815.
This was prepared January 2017 so some content is outdated, but there is helpful info in here regardless.
City Planner
Phone: (925) 256-3558 dutyplanner@walnut-creek.org
When it comes to financing your ADU, our friends at San Mateo Credit Union offer ADU Loans, reach out to one of our home specialists for an introduction!
Regulations
Max ADU Size
Lot under 9,000 sqft: 600 sqft Lot between 9,000 and 1000 sqft: 650 sqft Lot over 10,000 sqft: 800 sqft
Front Setback
45’ Note: Front setbacks vary by zoning, please talk to a home specialist to confirm
Primary Residence Setback
10’
Side and Rear Setback
4’