ADU permit process in Portola Valley, 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
- Planning & Building Department
Step by step
- 1
Email Planning ADU application and applicable checklist
Email Planning application materials Use applicable Ministerial or Discretionary checklist Town Planning submission
- 2
Town reviews Ministerial or Discretionary ADU submission
Respond to Town route-specific requirements Town review outcome
What you need to submit
- ADU Permit Application and applicable checklist
Project-specific next step
Build your Portola Valley permit report
Choose your ADU type and size to bring the City process, researched permit fees, and early construction budget into one planning report.
Sources for this guide
Additional city reference pages
The reviewed current FY 2026-27 Town schedule establishes the valuation methodology, residential valuation brackets, 55% plan review, staff-rate/recovery rules, and planning deposits, but has no dedicated ADU/JADU Building Permit fee row.
Accessed August 28, 2026
Accessed August 28, 2026
The Town identifies direct County Environmental Health and West Bay Sanitary fee obligations for septic/sewer work and Woodside Fire Protection District requirements, separately from Town fees.
Accessed August 28, 2026