ADU permit process in Danville, California

Last verified August 29, 2026

Prepared by GetYourPermit editorial teamReport an error

This guide includes the portions of the City permit process that passed our evidence review. Confirm project-specific requirements with the City before submitting.

Where to apply

Department: Building Division / Permit Center
Permit portal: City Online Portal System
Contact: 925-314-3330

Step by step

1
Review zoning and consult Planning
Review Town zoning, setbacks and ADU resources. Optionally discuss attached/detached choice and placement with Planning. Published Town requirements and any pre-application guidance
2
Submit complete Building Permit application
Prepare the Building Permit application, plans and applicable supporting documents. Submit in person or through the Online Permit Center. ADU Building Permit application
3
Ministerial Town and conditional outside-agency review
Respond if reviewers require additional information. Approved plans or request for additional information
4
Pay applicable fees and receive Building Permit
Pay applicable fees and obtain the issued permit from the Permit Center. Issued Building Permit authorizing construction
5
Construct and schedule required inspections
Build according to approved plans. Schedule every required inspection by phone or online portal. Required inspection results
6
Complete inspections and obtain Certificate of Occupancy
Pass required Town inspections and obtain applicable outside-agency approvals. Arrange pickup of the Certificate of Occupancy at the Permit Center. Certificate of Occupancy and authorization to occupy the ADU

What you need to submit

Building Permit Application
Lot survey — only in some cases
Outside Agency Checklist and applicable approvals — only in some cases
Required plans and supporting documents

Project-specific next step

Build your Danville permit report

Choose your ADU type and size to bring the City process, researched permit fees, and early construction budget into one planning report.

Start my permit report

Sources for this guide

Additional city reference pages

CityMaster Fee Schedule for User and Cost Recovery Fees, Fiscal Year 2026/27
The Council-adopted FY2026/27 schedule says Development Services fees are effective August 3, 2026 and provides Building Permit, plan-review, administrative, and valuation rules.
Accessed August 28, 2026
CityPermit Center
The current Permit Center identifies ADUs as a permit type and directs applicants to the Master Fee Schedule for current permit charges.
Accessed August 28, 2026
CityLearn More About ADUs
The current Town ADU page directs applicants to Building submittal requirements and the City’s ADU ordinance.
Accessed August 28, 2026