Walnut Creek ADU Permits and Regulations
As of January 1, 2020 the city of Walnut Creek updated their ADU zoning to comply with the state mandate and accommodate ADU’s. Since then, there’s been high demand from Walnut Creek homeowners looking to maximize their property.
Curious about building an ADU in Walnut Creek?
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Walnut Creek ADU Resources
City Code of Ordinances
ADU’s are discussed in Article 1, starting at Chapter 10-2.3.101
Walnut Creek’s Interim ADU regulations
These were effective starting December 17th
Rental rate trends in San Jose
The average Walnut Creek rent is $2,295, up 14% from last year
Walnut Creek’s ADU Guidebook
This was prepared January 2017 so some content is outdated, but there is helpful info in here regardless.
City Planner Info
Phone: (925) 256-3558
dutyplanner@walnut-creek.org
Financing Options
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’
Additional setback requirements may apply under the Building and Fire Codes or as a result of “no-build” easements or require compliance with existing easement restrictions.
Events & News
We are here to help you understand everything we’ve learned from ADU building
